/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/chl/chromosome-opt-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:48:58,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:48:58,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:48:58,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:48:59,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 21:48:59,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 21:48:59,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 21:48:59,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 21:48:59,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 21:48:59,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 21:48:59,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 21:48:59,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 21:48:59,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 21:48:59,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 21:48:59,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 21:48:59,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 21:48:59,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 21:48:59,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:48:59,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:48:59,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:48:59,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:48:59,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:48:59,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:48:59,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:48:59,070 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:48:59,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:48:59,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:48:59,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:48:59,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:48:59,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:48:59,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:48:59,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:48:59,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:48:59,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:48:59,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:48:59,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:48:59,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:48:59,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:48:59,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:48:59,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:48:59,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:48:59,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:48:59,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:48:59,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:48:59,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:48:59,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:48:59,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:48:59,073 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:48:59,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:48:59,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:48:59,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:48:59,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:48:59,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:48:59,342 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:48:59,343 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:48:59,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl [2021-03-10 21:48:59,344 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2021-03-10 21:48:59,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:48:59,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:48:59,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:48:59,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:48:59,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:48:59,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:48:59,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:48:59,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:48:59,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:48:59,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... [2021-03-10 21:48:59,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:48:59,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:48:59,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:48:59,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:48:59,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:48:59,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:48:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:48:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:48:59,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:48:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:48:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:48:59,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:48:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:48:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:48:59,473 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:48:59,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:48:59,751 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:48:59,752 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:48:59 BoogieIcfgContainer [2021-03-10 21:48:59,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:48:59,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:48:59,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:48:59,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:48:59,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:48:59" (1/2) ... [2021-03-10 21:48:59,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ce6bb0 and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:48:59, skipping insertion in model container [2021-03-10 21:48:59,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:48:59" (2/2) ... [2021-03-10 21:48:59,757 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2021-03-10 21:48:59,761 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:48:59,761 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:48:59,764 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:48:59,764 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:48:59,781 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:48:59,792 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:48:59,817 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:48:59,817 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:48:59,817 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:48:59,817 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:48:59,817 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:48:59,818 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:48:59,818 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:48:59,818 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:48:59,825 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-03-10 21:48:59,835 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 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) [2021-03-10 21:48:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 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) [2021-03-10 21:48:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:48:59,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:59,840 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:59,841 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:59,844 INFO L82 PathProgramCache]: Analyzing trace with hash -715556201, now seen corresponding path program 1 times [2021-03-10 21:48:59,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:59,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134136849] [2021-03-10 21:48:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:59,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134136849] [2021-03-10 21:48:59,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:48:59,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:48:59,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481003643] [2021-03-10 21:48:59,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:48:59,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:00,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:00,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:00,003 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 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) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:00,046 INFO L93 Difference]: Finished difference Result 46 states and 83 transitions. [2021-03-10 21:49:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:49:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:00,052 INFO L225 Difference]: With dead ends: 46 [2021-03-10 21:49:00,052 INFO L226 Difference]: Without dead ends: 44 [2021-03-10 21:49:00,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-03-10 21:49:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-03-10 21:49:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-03-10 21:49:00,073 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-03-10 21:49:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:00,073 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-03-10 21:49:00,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-03-10 21:49:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:49:00,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:00,074 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:00,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:49:00,074 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1713984121, now seen corresponding path program 2 times [2021-03-10 21:49:00,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:00,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317582689] [2021-03-10 21:49:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317582689] [2021-03-10 21:49:00,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:00,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:49:00,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281566775] [2021-03-10 21:49:00,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:49:00,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:00,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:00,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:00,107 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:00,119 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-03-10 21:49:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:00,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:49:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:00,120 INFO L225 Difference]: With dead ends: 48 [2021-03-10 21:49:00,120 INFO L226 Difference]: Without dead ends: 48 [2021-03-10 21:49:00,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-03-10 21:49:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-03-10 21:49:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-03-10 21:49:00,124 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-03-10 21:49:00,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:00,124 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-03-10 21:49:00,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-03-10 21:49:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:49:00,125 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:00,125 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:00,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:49:00,125 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash -434812415, now seen corresponding path program 3 times [2021-03-10 21:49:00,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:00,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745607709] [2021-03-10 21:49:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745607709] [2021-03-10 21:49:00,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:00,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:49:00,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193831157] [2021-03-10 21:49:00,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:49:00,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:00,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:00,147 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:00,162 INFO L93 Difference]: Finished difference Result 37 states and 70 transitions. [2021-03-10 21:49:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:49:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:00,162 INFO L225 Difference]: With dead ends: 37 [2021-03-10 21:49:00,163 INFO L226 Difference]: Without dead ends: 37 [2021-03-10 21:49:00,163 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-03-10 21:49:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-03-10 21:49:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-03-10 21:49:00,171 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-03-10 21:49:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:00,171 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-03-10 21:49:00,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-03-10 21:49:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:49:00,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:00,172 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:00,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:49:00,172 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash -341754080, now seen corresponding path program 1 times [2021-03-10 21:49:00,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:00,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454365807] [2021-03-10 21:49:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:00,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454365807] [2021-03-10 21:49:00,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:00,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:49:00,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885879062] [2021-03-10 21:49:00,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:49:00,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:00,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:00,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:00,203 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:00,217 INFO L93 Difference]: Finished difference Result 37 states and 70 transitions. [2021-03-10 21:49:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:49:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:00,218 INFO L225 Difference]: With dead ends: 37 [2021-03-10 21:49:00,218 INFO L226 Difference]: Without dead ends: 37 [2021-03-10 21:49:00,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:00,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-03-10 21:49:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-03-10 21:49:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-03-10 21:49:00,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-03-10 21:49:00,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:00,222 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-03-10 21:49:00,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-03-10 21:49:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:49:00,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:00,222 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:00,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:49:00,223 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:00,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:00,223 INFO L82 PathProgramCache]: Analyzing trace with hash 434832868, now seen corresponding path program 2 times [2021-03-10 21:49:00,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:00,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158523232] [2021-03-10 21:49:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:00,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158523232] [2021-03-10 21:49:00,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:00,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:49:00,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167845244] [2021-03-10 21:49:00,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:49:00,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:00,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:00,257 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:00,268 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-03-10 21:49:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:49:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:00,269 INFO L225 Difference]: With dead ends: 63 [2021-03-10 21:49:00,269 INFO L226 Difference]: Without dead ends: 63 [2021-03-10 21:49:00,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-10 21:49:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-03-10 21:49:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 76 transitions. [2021-03-10 21:49:00,273 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 76 transitions. Word has length 13 [2021-03-10 21:49:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:00,273 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 76 transitions. [2021-03-10 21:49:00,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 76 transitions. [2021-03-10 21:49:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:49:00,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:00,274 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:00,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:49:00,274 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:00,274 INFO L82 PathProgramCache]: Analyzing trace with hash 373288736, now seen corresponding path program 3 times [2021-03-10 21:49:00,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:00,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990991940] [2021-03-10 21:49:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:00,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990991940] [2021-03-10 21:49:00,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:49:00,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:49:00,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671648352] [2021-03-10 21:49:00,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:49:00,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:49:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:49:00,301 INFO L87 Difference]: Start difference. First operand 39 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:00,322 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2021-03-10 21:49:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:49:00,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:49:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:00,323 INFO L225 Difference]: With dead ends: 44 [2021-03-10 21:49:00,323 INFO L226 Difference]: Without dead ends: 39 [2021-03-10 21:49:00,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:49:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-03-10 21:49:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-03-10 21:49:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-03-10 21:49:00,326 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-03-10 21:49:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:00,326 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-03-10 21:49:00,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-03-10 21:49:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:00,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:00,327 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:00,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:49:00,327 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:00,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1182521280, now seen corresponding path program 1 times [2021-03-10 21:49:00,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:00,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441872769] [2021-03-10 21:49:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:00,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441872769] [2021-03-10 21:49:00,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970614065] [2021-03-10 21:49:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:49:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:01,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:01,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 21:49:01,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263318300] [2021-03-10 21:49:01,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:49:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:01,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:49:01,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:49:01,067 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:01,298 INFO L93 Difference]: Finished difference Result 71 states and 127 transitions. [2021-03-10 21:49:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:01,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:01,300 INFO L225 Difference]: With dead ends: 71 [2021-03-10 21:49:01,300 INFO L226 Difference]: Without dead ends: 58 [2021-03-10 21:49:01,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-03-10 21:49:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-03-10 21:49:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-03-10 21:49:01,309 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-03-10 21:49:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:01,309 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-03-10 21:49:01,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-03-10 21:49:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:01,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:01,312 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:01,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 21:49:01,529 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:01,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1118784670, now seen corresponding path program 2 times [2021-03-10 21:49:01,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:01,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522100398] [2021-03-10 21:49:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522100398] [2021-03-10 21:49:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077488569] [2021-03-10 21:49:01,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:01,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:01,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:01,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:49:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:02,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:02,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:49:02,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938905907] [2021-03-10 21:49:02,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:49:02,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:02,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:49:02,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:02,133 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:02,411 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-03-10 21:49:02,721 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-03-10 21:49:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:03,334 INFO L93 Difference]: Finished difference Result 116 states and 221 transitions. [2021-03-10 21:49:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:49:03,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:03,335 INFO L225 Difference]: With dead ends: 116 [2021-03-10 21:49:03,335 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:49:03,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1325.4ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:49:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 45. [2021-03-10 21:49:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2021-03-10 21:49:03,338 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 14 [2021-03-10 21:49:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:03,338 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2021-03-10 21:49:03,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2021-03-10 21:49:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:03,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:03,338 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:03,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 21:49:03,547 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:03,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1841591296, now seen corresponding path program 3 times [2021-03-10 21:49:03,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:03,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107670842] [2021-03-10 21:49:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:03,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107670842] [2021-03-10 21:49:03,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192725150] [2021-03-10 21:49:03,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:49:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:03,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:04,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:04,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:49:04,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756208425] [2021-03-10 21:49:04,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:49:04,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:49:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:04,052 INFO L87 Difference]: Start difference. First operand 45 states and 88 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:04,740 INFO L93 Difference]: Finished difference Result 100 states and 180 transitions. [2021-03-10 21:49:04,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:49:04,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:04,741 INFO L225 Difference]: With dead ends: 100 [2021-03-10 21:49:04,741 INFO L226 Difference]: Without dead ends: 74 [2021-03-10 21:49:04,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 856.0ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:49:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-03-10 21:49:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2021-03-10 21:49:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 94 transitions. [2021-03-10 21:49:04,745 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 94 transitions. Word has length 14 [2021-03-10 21:49:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:04,745 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 94 transitions. [2021-03-10 21:49:04,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 94 transitions. [2021-03-10 21:49:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:04,746 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:04,746 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:04,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 21:49:04,959 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash 531039348, now seen corresponding path program 4 times [2021-03-10 21:49:04,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:04,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441957626] [2021-03-10 21:49:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:05,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441957626] [2021-03-10 21:49:05,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088385511] [2021-03-10 21:49:05,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:05,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:05,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:05,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:49:05,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:05,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:05,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:49:05,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930411022] [2021-03-10 21:49:05,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:49:05,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:05,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:49:05,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:05,420 INFO L87 Difference]: Start difference. First operand 47 states and 94 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:05,761 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2021-03-10 21:49:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:05,762 INFO L225 Difference]: With dead ends: 71 [2021-03-10 21:49:05,762 INFO L226 Difference]: Without dead ends: 60 [2021-03-10 21:49:05,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 553.5ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-03-10 21:49:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-03-10 21:49:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 48 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 98 transitions. [2021-03-10 21:49:05,765 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 98 transitions. Word has length 14 [2021-03-10 21:49:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:05,765 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 98 transitions. [2021-03-10 21:49:05,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 98 transitions. [2021-03-10 21:49:05,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:05,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:05,766 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:05,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:49:05,972 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1865630678, now seen corresponding path program 5 times [2021-03-10 21:49:05,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:05,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021650569] [2021-03-10 21:49:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:06,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021650569] [2021-03-10 21:49:06,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679426256] [2021-03-10 21:49:06,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:06,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:06,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:06,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:06,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:06,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:49:06,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017112746] [2021-03-10 21:49:06,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:49:06,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:06,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:49:06,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:06,409 INFO L87 Difference]: Start difference. First operand 49 states and 98 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:06,696 INFO L93 Difference]: Finished difference Result 100 states and 180 transitions. [2021-03-10 21:49:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:06,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:06,697 INFO L225 Difference]: With dead ends: 100 [2021-03-10 21:49:06,697 INFO L226 Difference]: Without dead ends: 74 [2021-03-10 21:49:06,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:49:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-03-10 21:49:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2021-03-10 21:49:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 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) [2021-03-10 21:49:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 101 transitions. [2021-03-10 21:49:06,700 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 101 transitions. Word has length 14 [2021-03-10 21:49:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:06,700 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 101 transitions. [2021-03-10 21:49:06,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 101 transitions. [2021-03-10 21:49:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:06,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:06,700 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:06,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 21:49:06,907 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:06,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1327775100, now seen corresponding path program 6 times [2021-03-10 21:49:06,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:06,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032454844] [2021-03-10 21:49:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:07,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032454844] [2021-03-10 21:49:07,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693778300] [2021-03-10 21:49:07,046 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 [2021-03-10 21:49:07,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:07,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:49:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:07,216 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:49:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:07,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:07,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:49:07,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991988838] [2021-03-10 21:49:07,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:49:07,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:07,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:49:07,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:07,334 INFO L87 Difference]: Start difference. First operand 50 states and 101 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:07,945 INFO L93 Difference]: Finished difference Result 121 states and 225 transitions. [2021-03-10 21:49:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:49:07,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:07,946 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:49:07,946 INFO L226 Difference]: Without dead ends: 97 [2021-03-10 21:49:07,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:49:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-03-10 21:49:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 53. [2021-03-10 21:49:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 111 transitions. [2021-03-10 21:49:07,948 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 111 transitions. Word has length 14 [2021-03-10 21:49:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:07,949 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 111 transitions. [2021-03-10 21:49:07,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 111 transitions. [2021-03-10 21:49:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:07,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:07,949 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:08,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:08,163 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:08,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1804086546, now seen corresponding path program 7 times [2021-03-10 21:49:08,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:08,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037064490] [2021-03-10 21:49:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:08,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037064490] [2021-03-10 21:49:08,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827624529] [2021-03-10 21:49:08,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:08,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:49:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:08,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:08,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:49:08,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060664364] [2021-03-10 21:49:08,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:49:08,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:08,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:49:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:08,481 INFO L87 Difference]: Start difference. First operand 53 states and 111 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:08,836 INFO L93 Difference]: Finished difference Result 83 states and 155 transitions. [2021-03-10 21:49:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:08,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:08,837 INFO L225 Difference]: With dead ends: 83 [2021-03-10 21:49:08,837 INFO L226 Difference]: Without dead ends: 70 [2021-03-10 21:49:08,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:49:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-03-10 21:49:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-03-10 21:49:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 110 transitions. [2021-03-10 21:49:08,839 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 110 transitions. Word has length 14 [2021-03-10 21:49:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:08,839 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 110 transitions. [2021-03-10 21:49:08,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 110 transitions. [2021-03-10 21:49:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:08,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:08,840 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:09,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:49:09,049 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1416837628, now seen corresponding path program 8 times [2021-03-10 21:49:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:09,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658605320] [2021-03-10 21:49:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:09,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658605320] [2021-03-10 21:49:09,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575698304] [2021-03-10 21:49:09,248 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 [2021-03-10 21:49:09,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:09,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:09,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:09,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:09,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 21:49:09,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896373751] [2021-03-10 21:49:09,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:49:09,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:09,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:49:09,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:09,492 INFO L87 Difference]: Start difference. First operand 53 states and 110 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:09,842 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-03-10 21:49:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:09,843 INFO L225 Difference]: With dead ends: 84 [2021-03-10 21:49:09,843 INFO L226 Difference]: Without dead ends: 73 [2021-03-10 21:49:09,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:49:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-03-10 21:49:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2021-03-10 21:49:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 53 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) [2021-03-10 21:49:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 112 transitions. [2021-03-10 21:49:09,845 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 112 transitions. Word has length 14 [2021-03-10 21:49:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:09,846 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 112 transitions. [2021-03-10 21:49:09,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 112 transitions. [2021-03-10 21:49:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:09,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:09,846 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:10,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 21:49:10,055 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:10,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1543538338, now seen corresponding path program 9 times [2021-03-10 21:49:10,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:10,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343223669] [2021-03-10 21:49:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:10,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343223669] [2021-03-10 21:49:10,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898894253] [2021-03-10 21:49:10,197 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 [2021-03-10 21:49:10,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:49:10,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:49:10,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:10,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:10,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:49:10,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727695771] [2021-03-10 21:49:10,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:49:10,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:49:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:10,442 INFO L87 Difference]: Start difference. First operand 54 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:10,710 INFO L93 Difference]: Finished difference Result 116 states and 210 transitions. [2021-03-10 21:49:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:10,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:10,711 INFO L225 Difference]: With dead ends: 116 [2021-03-10 21:49:10,711 INFO L226 Difference]: Without dead ends: 90 [2021-03-10 21:49:10,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:49:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-03-10 21:49:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 53. [2021-03-10 21:49:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 110 transitions. [2021-03-10 21:49:10,714 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 110 transitions. Word has length 14 [2021-03-10 21:49:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:10,714 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 110 transitions. [2021-03-10 21:49:10,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 110 transitions. [2021-03-10 21:49:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:10,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:10,714 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:10,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:10,920 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2081393916, now seen corresponding path program 10 times [2021-03-10 21:49:10,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:10,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819971355] [2021-03-10 21:49:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:11,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819971355] [2021-03-10 21:49:11,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660370663] [2021-03-10 21:49:11,006 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 [2021-03-10 21:49:11,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:11,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:49:11,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:11,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:11,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:49:11,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491732663] [2021-03-10 21:49:11,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:49:11,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:49:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:11,194 INFO L87 Difference]: Start difference. First operand 53 states and 110 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:11,789 INFO L93 Difference]: Finished difference Result 107 states and 200 transitions. [2021-03-10 21:49:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:49:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:11,790 INFO L225 Difference]: With dead ends: 107 [2021-03-10 21:49:11,790 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 21:49:11,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 645.3ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:49:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 21:49:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2021-03-10 21:49:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 124 transitions. [2021-03-10 21:49:11,793 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 124 transitions. Word has length 14 [2021-03-10 21:49:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:11,793 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 124 transitions. [2021-03-10 21:49:11,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 124 transitions. [2021-03-10 21:49:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:49:11,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:11,793 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:11,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:12,000 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:12,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1119481792, now seen corresponding path program 11 times [2021-03-10 21:49:12,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:12,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24351312] [2021-03-10 21:49:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:12,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24351312] [2021-03-10 21:49:12,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437762067] [2021-03-10 21:49:12,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:12,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:49:12,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:49:12,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:12,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:12,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:49:12,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849172014] [2021-03-10 21:49:12,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:49:12,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:12,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:49:12,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:12,334 INFO L87 Difference]: Start difference. First operand 59 states and 124 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:13,275 INFO L93 Difference]: Finished difference Result 138 states and 260 transitions. [2021-03-10 21:49:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:49:13,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:49:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:13,276 INFO L225 Difference]: With dead ends: 138 [2021-03-10 21:49:13,276 INFO L226 Difference]: Without dead ends: 109 [2021-03-10 21:49:13,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1030.2ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-10 21:49:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 68. [2021-03-10 21:49:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 143 transitions. [2021-03-10 21:49:13,279 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 143 transitions. Word has length 14 [2021-03-10 21:49:13,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:13,279 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 143 transitions. [2021-03-10 21:49:13,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 143 transitions. [2021-03-10 21:49:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:13,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:13,279 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:13,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:13,503 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:13,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1559031433, now seen corresponding path program 12 times [2021-03-10 21:49:13,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:13,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771269016] [2021-03-10 21:49:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:13,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771269016] [2021-03-10 21:49:13,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560504635] [2021-03-10 21:49:13,551 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 [2021-03-10 21:49:13,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:49:13,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:13,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:13,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:13,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:49:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913037572] [2021-03-10 21:49:13,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:49:13,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:49:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:49:13,635 INFO L87 Difference]: Start difference. First operand 68 states and 143 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:13,683 INFO L93 Difference]: Finished difference Result 104 states and 207 transitions. [2021-03-10 21:49:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:13,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:13,684 INFO L225 Difference]: With dead ends: 104 [2021-03-10 21:49:13,684 INFO L226 Difference]: Without dead ends: 104 [2021-03-10 21:49:13,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-03-10 21:49:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-03-10 21:49:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 143 transitions. [2021-03-10 21:49:13,689 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 143 transitions. Word has length 15 [2021-03-10 21:49:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:13,689 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 143 transitions. [2021-03-10 21:49:13,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 143 transitions. [2021-03-10 21:49:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:13,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:13,691 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:13,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:13,895 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:13,896 INFO L82 PathProgramCache]: Analyzing trace with hash 312216095, now seen corresponding path program 13 times [2021-03-10 21:49:13,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:13,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980496220] [2021-03-10 21:49:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:13,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980496220] [2021-03-10 21:49:13,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869931302] [2021-03-10 21:49:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:13,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:14,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:14,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:14,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523309702] [2021-03-10 21:49:14,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:14,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:14,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:14,059 INFO L87 Difference]: Start difference. First operand 68 states and 143 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:14,281 INFO L93 Difference]: Finished difference Result 111 states and 221 transitions. [2021-03-10 21:49:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:14,282 INFO L225 Difference]: With dead ends: 111 [2021-03-10 21:49:14,282 INFO L226 Difference]: Without dead ends: 111 [2021-03-10 21:49:14,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-03-10 21:49:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 67. [2021-03-10 21:49:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.121212121212121) internal successors, (140), 66 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 140 transitions. [2021-03-10 21:49:14,285 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 140 transitions. Word has length 15 [2021-03-10 21:49:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 140 transitions. [2021-03-10 21:49:14,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 140 transitions. [2021-03-10 21:49:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:14,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:14,285 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:14,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 21:49:14,491 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:14,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1144507010, now seen corresponding path program 14 times [2021-03-10 21:49:14,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:14,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362707971] [2021-03-10 21:49:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362707971] [2021-03-10 21:49:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232039995] [2021-03-10 21:49:14,549 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 [2021-03-10 21:49:14,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:14,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:14,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:14,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789641920] [2021-03-10 21:49:14,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:14,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:14,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:14,719 INFO L87 Difference]: Start difference. First operand 67 states and 140 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:15,226 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-03-10 21:49:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:15,227 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:49:15,227 INFO L226 Difference]: Without dead ends: 117 [2021-03-10 21:49:15,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-03-10 21:49:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2021-03-10 21:49:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.125) internal successors, (153), 72 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 153 transitions. [2021-03-10 21:49:15,229 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 153 transitions. Word has length 15 [2021-03-10 21:49:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:15,229 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 153 transitions. [2021-03-10 21:49:15,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 153 transitions. [2021-03-10 21:49:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:15,230 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:15,230 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:15,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:15,446 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash 901756610, now seen corresponding path program 15 times [2021-03-10 21:49:15,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:15,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785188720] [2021-03-10 21:49:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:15,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785188720] [2021-03-10 21:49:15,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733597723] [2021-03-10 21:49:15,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:15,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:15,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:15,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:15,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149934588] [2021-03-10 21:49:15,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:15,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:15,656 INFO L87 Difference]: Start difference. First operand 73 states and 153 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:15,809 INFO L93 Difference]: Finished difference Result 95 states and 189 transitions. [2021-03-10 21:49:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:49:15,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:15,816 INFO L225 Difference]: With dead ends: 95 [2021-03-10 21:49:15,816 INFO L226 Difference]: Without dead ends: 95 [2021-03-10 21:49:15,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-03-10 21:49:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2021-03-10 21:49:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 141 transitions. [2021-03-10 21:49:15,819 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 141 transitions. Word has length 15 [2021-03-10 21:49:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:15,819 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 141 transitions. [2021-03-10 21:49:15,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 141 transitions. [2021-03-10 21:49:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:15,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:15,820 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:16,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:16,031 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:16,032 INFO L82 PathProgramCache]: Analyzing trace with hash -138479188, now seen corresponding path program 16 times [2021-03-10 21:49:16,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:16,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122113795] [2021-03-10 21:49:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:16,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122113795] [2021-03-10 21:49:16,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848991319] [2021-03-10 21:49:16,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:16,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:16,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:16,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:16,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:16,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801156332] [2021-03-10 21:49:16,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:16,203 INFO L87 Difference]: Start difference. First operand 68 states and 141 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:16,235 INFO L93 Difference]: Finished difference Result 78 states and 161 transitions. [2021-03-10 21:49:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:16,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:16,236 INFO L225 Difference]: With dead ends: 78 [2021-03-10 21:49:16,236 INFO L226 Difference]: Without dead ends: 78 [2021-03-10 21:49:16,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-03-10 21:49:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2021-03-10 21:49:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 68 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 143 transitions. [2021-03-10 21:49:16,238 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 143 transitions. Word has length 15 [2021-03-10 21:49:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:16,238 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 143 transitions. [2021-03-10 21:49:16,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 143 transitions. [2021-03-10 21:49:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:16,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:16,239 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:16,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:16,439 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash -966724252, now seen corresponding path program 17 times [2021-03-10 21:49:16,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:16,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081835547] [2021-03-10 21:49:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:16,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081835547] [2021-03-10 21:49:16,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76540089] [2021-03-10 21:49:16,486 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 [2021-03-10 21:49:16,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:49:16,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:16,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:16,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:16,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146098345] [2021-03-10 21:49:16,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:16,591 INFO L87 Difference]: Start difference. First operand 69 states and 143 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:16,678 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-03-10 21:49:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:16,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:16,679 INFO L225 Difference]: With dead ends: 94 [2021-03-10 21:49:16,679 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 21:49:16,679 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:49:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 21:49:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2021-03-10 21:49:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 152 transitions. [2021-03-10 21:49:16,681 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 152 transitions. Word has length 15 [2021-03-10 21:49:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:16,681 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 152 transitions. [2021-03-10 21:49:16,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 152 transitions. [2021-03-10 21:49:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:16,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:16,682 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:16,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 21:49:16,895 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash 367867078, now seen corresponding path program 18 times [2021-03-10 21:49:16,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:16,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157694059] [2021-03-10 21:49:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:16,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157694059] [2021-03-10 21:49:16,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264834422] [2021-03-10 21:49:16,944 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 [2021-03-10 21:49:16,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:17,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:17,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160718919] [2021-03-10 21:49:17,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:17,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:17,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:17,046 INFO L87 Difference]: Start difference. First operand 73 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:17,146 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-03-10 21:49:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:17,147 INFO L225 Difference]: With dead ends: 96 [2021-03-10 21:49:17,147 INFO L226 Difference]: Without dead ends: 96 [2021-03-10 21:49:17,147 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:49:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-03-10 21:49:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 73. [2021-03-10 21:49:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 152 transitions. [2021-03-10 21:49:17,149 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 152 transitions. Word has length 15 [2021-03-10 21:49:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:17,149 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 152 transitions. [2021-03-10 21:49:17,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 152 transitions. [2021-03-10 21:49:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:17,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:17,149 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:17,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 21:49:17,350 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:17,350 INFO L82 PathProgramCache]: Analyzing trace with hash -169988500, now seen corresponding path program 19 times [2021-03-10 21:49:17,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:17,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088776635] [2021-03-10 21:49:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:17,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088776635] [2021-03-10 21:49:17,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148986843] [2021-03-10 21:49:17,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:17,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:17,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:17,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043547595] [2021-03-10 21:49:17,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:17,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:17,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:17,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:17,517 INFO L87 Difference]: Start difference. First operand 73 states and 152 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:17,641 INFO L93 Difference]: Finished difference Result 85 states and 174 transitions. [2021-03-10 21:49:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:17,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:17,643 INFO L225 Difference]: With dead ends: 85 [2021-03-10 21:49:17,643 INFO L226 Difference]: Without dead ends: 85 [2021-03-10 21:49:17,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-03-10 21:49:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2021-03-10 21:49:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 145 transitions. [2021-03-10 21:49:17,646 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 145 transitions. Word has length 15 [2021-03-10 21:49:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:17,646 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 145 transitions. [2021-03-10 21:49:17,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 145 transitions. [2021-03-10 21:49:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:17,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:17,647 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:17,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:17,851 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:17,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1551463716, now seen corresponding path program 20 times [2021-03-10 21:49:17,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:17,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041683440] [2021-03-10 21:49:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:17,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041683440] [2021-03-10 21:49:17,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641874658] [2021-03-10 21:49:17,902 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 [2021-03-10 21:49:17,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:18,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:18,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:18,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943362195] [2021-03-10 21:49:18,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:18,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:18,038 INFO L87 Difference]: Start difference. First operand 70 states and 145 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:18,074 INFO L93 Difference]: Finished difference Result 77 states and 159 transitions. [2021-03-10 21:49:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:18,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:18,074 INFO L225 Difference]: With dead ends: 77 [2021-03-10 21:49:18,075 INFO L226 Difference]: Without dead ends: 77 [2021-03-10 21:49:18,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-03-10 21:49:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2021-03-10 21:49:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 141 transitions. [2021-03-10 21:49:18,076 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 141 transitions. Word has length 15 [2021-03-10 21:49:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:18,076 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 141 transitions. [2021-03-10 21:49:18,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 141 transitions. [2021-03-10 21:49:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:18,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:18,077 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:18,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 21:49:18,287 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:18,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2057809982, now seen corresponding path program 21 times [2021-03-10 21:49:18,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:18,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199898672] [2021-03-10 21:49:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199898672] [2021-03-10 21:49:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354494467] [2021-03-10 21:49:18,339 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 [2021-03-10 21:49:18,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:18,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:18,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:18,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:18,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:18,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57875326] [2021-03-10 21:49:18,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:18,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:18,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:18,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:18,431 INFO L87 Difference]: Start difference. First operand 68 states and 141 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:18,563 INFO L93 Difference]: Finished difference Result 122 states and 230 transitions. [2021-03-10 21:49:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:49:18,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:18,564 INFO L225 Difference]: With dead ends: 122 [2021-03-10 21:49:18,564 INFO L226 Difference]: Without dead ends: 122 [2021-03-10 21:49:18,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-03-10 21:49:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 70. [2021-03-10 21:49:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2021-03-10 21:49:18,566 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2021-03-10 21:49:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:18,567 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2021-03-10 21:49:18,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2021-03-10 21:49:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:18,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:18,567 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:18,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-10 21:49:18,779 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:18,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:18,779 INFO L82 PathProgramCache]: Analyzing trace with hash -742071201, now seen corresponding path program 22 times [2021-03-10 21:49:18,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:18,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144980023] [2021-03-10 21:49:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:18,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144980023] [2021-03-10 21:49:18,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225160009] [2021-03-10 21:49:18,820 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 [2021-03-10 21:49:18,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:18,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:18,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:18,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:18,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:18,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:18,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680046647] [2021-03-10 21:49:18,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:18,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:18,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:18,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:18,991 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:19,198 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-03-10 21:49:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:19,199 INFO L225 Difference]: With dead ends: 96 [2021-03-10 21:49:19,199 INFO L226 Difference]: Without dead ends: 90 [2021-03-10 21:49:19,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:49:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-03-10 21:49:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-03-10 21:49:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 157 transitions. [2021-03-10 21:49:19,201 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 157 transitions. Word has length 15 [2021-03-10 21:49:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:19,201 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 157 transitions. [2021-03-10 21:49:19,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 157 transitions. [2021-03-10 21:49:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:19,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:19,201 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:19,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:19,402 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:19,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:19,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1519954404, now seen corresponding path program 23 times [2021-03-10 21:49:19,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:19,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832050811] [2021-03-10 21:49:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:19,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832050811] [2021-03-10 21:49:19,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607723657] [2021-03-10 21:49:19,450 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 [2021-03-10 21:49:19,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:49:19,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:19,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:19,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:19,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822271007] [2021-03-10 21:49:19,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:19,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:19,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:19,543 INFO L87 Difference]: Start difference. First operand 76 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:19,684 INFO L93 Difference]: Finished difference Result 89 states and 180 transitions. [2021-03-10 21:49:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:19,685 INFO L225 Difference]: With dead ends: 89 [2021-03-10 21:49:19,685 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 21:49:19,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 21:49:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-03-10 21:49:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2021-03-10 21:49:19,688 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 15 [2021-03-10 21:49:19,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:19,688 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2021-03-10 21:49:19,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2021-03-10 21:49:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:19,688 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:19,689 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:19,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 21:49:19,895 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:19,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1794258174, now seen corresponding path program 24 times [2021-03-10 21:49:19,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:19,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500596743] [2021-03-10 21:49:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:19,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500596743] [2021-03-10 21:49:19,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988064417] [2021-03-10 21:49:19,943 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 [2021-03-10 21:49:20,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:20,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:20,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:49:20,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:20,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:20,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:20,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580584745] [2021-03-10 21:49:20,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:20,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:20,098 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:20,324 INFO L93 Difference]: Finished difference Result 146 states and 271 transitions. [2021-03-10 21:49:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:49:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:20,325 INFO L225 Difference]: With dead ends: 146 [2021-03-10 21:49:20,326 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 21:49:20,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 21:49:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 76. [2021-03-10 21:49:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 157 transitions. [2021-03-10 21:49:20,328 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 157 transitions. Word has length 15 [2021-03-10 21:49:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:20,328 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 157 transitions. [2021-03-10 21:49:20,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 157 transitions. [2021-03-10 21:49:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:20,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:20,328 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:20,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 21:49:20,535 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:20,535 INFO L82 PathProgramCache]: Analyzing trace with hash -299172061, now seen corresponding path program 25 times [2021-03-10 21:49:20,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:20,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188927425] [2021-03-10 21:49:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:20,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188927425] [2021-03-10 21:49:20,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787723523] [2021-03-10 21:49:20,581 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 [2021-03-10 21:49:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:49:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:20,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:20,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:20,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580428628] [2021-03-10 21:49:20,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:20,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:20,745 INFO L87 Difference]: Start difference. First operand 76 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:21,240 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-03-10 21:49:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:21,241 INFO L225 Difference]: With dead ends: 124 [2021-03-10 21:49:21,241 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:49:21,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:49:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2021-03-10 21:49:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.08) internal successors, (156), 75 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 156 transitions. [2021-03-10 21:49:21,244 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 156 transitions. Word has length 15 [2021-03-10 21:49:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:21,244 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 156 transitions. [2021-03-10 21:49:21,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 156 transitions. [2021-03-10 21:49:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:21,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:21,244 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:21,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:21,459 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:21,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1962853544, now seen corresponding path program 26 times [2021-03-10 21:49:21,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:21,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216070916] [2021-03-10 21:49:21,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:21,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216070916] [2021-03-10 21:49:21,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939637877] [2021-03-10 21:49:21,507 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 [2021-03-10 21:49:21,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:21,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:21,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:21,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888918915] [2021-03-10 21:49:21,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:21,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:21,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:21,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:21,612 INFO L87 Difference]: Start difference. First operand 76 states and 156 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:21,802 INFO L93 Difference]: Finished difference Result 119 states and 236 transitions. [2021-03-10 21:49:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:21,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:21,803 INFO L225 Difference]: With dead ends: 119 [2021-03-10 21:49:21,803 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 21:49:21,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 21:49:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 76. [2021-03-10 21:49:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.08) internal successors, (156), 75 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 156 transitions. [2021-03-10 21:49:21,805 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 156 transitions. Word has length 15 [2021-03-10 21:49:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:21,805 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 156 transitions. [2021-03-10 21:49:21,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 156 transitions. [2021-03-10 21:49:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:21,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:21,805 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:22,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 21:49:22,015 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash 207174205, now seen corresponding path program 27 times [2021-03-10 21:49:22,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:22,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471947257] [2021-03-10 21:49:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:22,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471947257] [2021-03-10 21:49:22,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684549349] [2021-03-10 21:49:22,059 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 [2021-03-10 21:49:22,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:49:22,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:22,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:22,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:22,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:22,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659344280] [2021-03-10 21:49:22,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:22,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:22,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:22,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:22,205 INFO L87 Difference]: Start difference. First operand 76 states and 156 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:22,389 INFO L93 Difference]: Finished difference Result 103 states and 201 transitions. [2021-03-10 21:49:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:22,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:22,389 INFO L225 Difference]: With dead ends: 103 [2021-03-10 21:49:22,389 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 21:49:22,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 21:49:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-03-10 21:49:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 146 transitions. [2021-03-10 21:49:22,391 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 146 transitions. Word has length 15 [2021-03-10 21:49:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:22,391 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 146 transitions. [2021-03-10 21:49:22,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 146 transitions. [2021-03-10 21:49:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:49:22,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:22,392 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:22,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:49:22,599 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:22,599 INFO L82 PathProgramCache]: Analyzing trace with hash 868761956, now seen corresponding path program 28 times [2021-03-10 21:49:22,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:22,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317444600] [2021-03-10 21:49:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:22,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317444600] [2021-03-10 21:49:22,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083034267] [2021-03-10 21:49:22,648 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 [2021-03-10 21:49:22,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:22,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:22,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:22,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:22,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38615101] [2021-03-10 21:49:22,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:22,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:22,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:22,736 INFO L87 Difference]: Start difference. First operand 71 states and 146 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:22,841 INFO L93 Difference]: Finished difference Result 106 states and 209 transitions. [2021-03-10 21:49:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:22,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:49:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:22,842 INFO L225 Difference]: With dead ends: 106 [2021-03-10 21:49:22,842 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 21:49:22,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 21:49:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2021-03-10 21:49:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-03-10 21:49:22,844 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 15 [2021-03-10 21:49:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:22,844 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-03-10 21:49:22,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-03-10 21:49:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:22,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:22,844 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:23,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:23,047 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1907254775, now seen corresponding path program 29 times [2021-03-10 21:49:23,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:23,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543882916] [2021-03-10 21:49:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:23,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543882916] [2021-03-10 21:49:23,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061840477] [2021-03-10 21:49:23,274 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 [2021-03-10 21:49:23,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:23,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:23,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:23,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:23,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:23,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58584843] [2021-03-10 21:49:23,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:23,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:23,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:23,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:23,631 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:23,931 INFO L93 Difference]: Finished difference Result 117 states and 224 transitions. [2021-03-10 21:49:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:49:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:23,932 INFO L225 Difference]: With dead ends: 117 [2021-03-10 21:49:23,932 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:49:23,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 630.7ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:49:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:49:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2021-03-10 21:49:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 141 transitions. [2021-03-10 21:49:23,934 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 141 transitions. Word has length 16 [2021-03-10 21:49:23,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:23,934 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 141 transitions. [2021-03-10 21:49:23,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 141 transitions. [2021-03-10 21:49:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:23,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:23,934 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:24,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:24,147 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:24,147 INFO L82 PathProgramCache]: Analyzing trace with hash 233295193, now seen corresponding path program 30 times [2021-03-10 21:49:24,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:24,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792513245] [2021-03-10 21:49:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792513245] [2021-03-10 21:49:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758426390] [2021-03-10 21:49:24,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:24,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:49:24,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:24,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:24,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:24,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:24,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:24,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981843798] [2021-03-10 21:49:24,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:24,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:24,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:24,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:24,713 INFO L87 Difference]: Start difference. First operand 70 states and 141 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:25,370 INFO L93 Difference]: Finished difference Result 116 states and 223 transitions. [2021-03-10 21:49:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:49:25,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:25,370 INFO L225 Difference]: With dead ends: 116 [2021-03-10 21:49:25,371 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 21:49:25,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 955.1ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:49:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 21:49:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2021-03-10 21:49:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 70 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 143 transitions. [2021-03-10 21:49:25,372 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 143 transitions. Word has length 16 [2021-03-10 21:49:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:25,372 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 143 transitions. [2021-03-10 21:49:25,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 143 transitions. [2021-03-10 21:49:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:25,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:25,373 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:25,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:25,587 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1344046537, now seen corresponding path program 31 times [2021-03-10 21:49:25,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:25,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59805161] [2021-03-10 21:49:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:25,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59805161] [2021-03-10 21:49:25,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408527988] [2021-03-10 21:49:25,806 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 [2021-03-10 21:49:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:26,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:26,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:26,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726264044] [2021-03-10 21:49:26,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:26,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:26,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:26,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:26,205 INFO L87 Difference]: Start difference. First operand 71 states and 143 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:27,189 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2021-03-10 21:49:27,346 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-03-10 21:49:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:27,378 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-03-10 21:49:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:49:27,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:27,379 INFO L225 Difference]: With dead ends: 128 [2021-03-10 21:49:27,379 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 21:49:27,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1424.4ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:49:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 21:49:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-03-10 21:49:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-03-10 21:49:27,381 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 16 [2021-03-10 21:49:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:27,382 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-03-10 21:49:27,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-03-10 21:49:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:27,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:27,382 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:27,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 21:49:27,595 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -806940605, now seen corresponding path program 32 times [2021-03-10 21:49:27,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:27,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149087564] [2021-03-10 21:49:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149087564] [2021-03-10 21:49:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651911216] [2021-03-10 21:49:27,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:27,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:27,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:27,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:28,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:28,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:28,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728926521] [2021-03-10 21:49:28,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:28,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:28,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:28,176 INFO L87 Difference]: Start difference. First operand 72 states and 145 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:28,566 INFO L93 Difference]: Finished difference Result 89 states and 170 transitions. [2021-03-10 21:49:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:49:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:28,567 INFO L225 Difference]: With dead ends: 89 [2021-03-10 21:49:28,567 INFO L226 Difference]: Without dead ends: 76 [2021-03-10 21:49:28,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-03-10 21:49:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-03-10 21:49:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 72 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 147 transitions. [2021-03-10 21:49:28,571 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 147 transitions. Word has length 16 [2021-03-10 21:49:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:28,571 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 147 transitions. [2021-03-10 21:49:28,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 147 transitions. [2021-03-10 21:49:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:28,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:28,572 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:28,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 21:49:28,784 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1910684961, now seen corresponding path program 33 times [2021-03-10 21:49:28,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:28,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060101422] [2021-03-10 21:49:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:29,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060101422] [2021-03-10 21:49:29,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048828158] [2021-03-10 21:49:29,040 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 [2021-03-10 21:49:29,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:49:29,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:29,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:29,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:29,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:29,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:29,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910598052] [2021-03-10 21:49:29,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:29,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:29,424 INFO L87 Difference]: Start difference. First operand 73 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:30,075 INFO L93 Difference]: Finished difference Result 112 states and 209 transitions. [2021-03-10 21:49:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:49:30,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:30,075 INFO L225 Difference]: With dead ends: 112 [2021-03-10 21:49:30,076 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 21:49:30,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 954.2ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 21:49:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-03-10 21:49:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 76 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 158 transitions. [2021-03-10 21:49:30,078 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 158 transitions. Word has length 16 [2021-03-10 21:49:30,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:30,078 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 158 transitions. [2021-03-10 21:49:30,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 158 transitions. [2021-03-10 21:49:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:30,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:30,078 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:30,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:30,288 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:30,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1049691005, now seen corresponding path program 34 times [2021-03-10 21:49:30,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:30,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513367571] [2021-03-10 21:49:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:30,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513367571] [2021-03-10 21:49:30,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775651055] [2021-03-10 21:49:30,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:30,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:30,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:30,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:30,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:30,632 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:49:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:30,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:30,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:30,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680696961] [2021-03-10 21:49:30,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:30,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:30,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:30,802 INFO L87 Difference]: Start difference. First operand 77 states and 158 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:31,363 INFO L93 Difference]: Finished difference Result 110 states and 207 transitions. [2021-03-10 21:49:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:49:31,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:31,364 INFO L225 Difference]: With dead ends: 110 [2021-03-10 21:49:31,364 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 21:49:31,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 21:49:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-03-10 21:49:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-03-10 21:49:31,366 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 16 [2021-03-10 21:49:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:31,366 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-03-10 21:49:31,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-03-10 21:49:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:31,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:31,366 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:31,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:31,579 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1670740832, now seen corresponding path program 35 times [2021-03-10 21:49:31,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:31,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308876476] [2021-03-10 21:49:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:31,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308876476] [2021-03-10 21:49:31,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799348582] [2021-03-10 21:49:31,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:31,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:49:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:31,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:31,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:31,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:31,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620008763] [2021-03-10 21:49:31,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:31,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:31,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:31,730 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:31,857 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-03-10 21:49:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:49:31,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:31,857 INFO L225 Difference]: With dead ends: 91 [2021-03-10 21:49:31,857 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:49:31,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:49:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2021-03-10 21:49:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-03-10 21:49:31,859 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 16 [2021-03-10 21:49:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:31,860 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-03-10 21:49:31,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-03-10 21:49:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:31,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:31,860 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:32,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:32,075 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:32,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1877936069, now seen corresponding path program 36 times [2021-03-10 21:49:32,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:32,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483930340] [2021-03-10 21:49:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:32,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483930340] [2021-03-10 21:49:32,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325442186] [2021-03-10 21:49:32,257 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 [2021-03-10 21:49:32,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:49:32,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:32,478 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:49:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:32,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:32,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:32,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989700352] [2021-03-10 21:49:32,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:32,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:32,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:32,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:32,610 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:33,223 INFO L93 Difference]: Finished difference Result 119 states and 225 transitions. [2021-03-10 21:49:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:49:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:33,224 INFO L225 Difference]: With dead ends: 119 [2021-03-10 21:49:33,224 INFO L226 Difference]: Without dead ends: 101 [2021-03-10 21:49:33,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 802.3ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:49:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-03-10 21:49:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-03-10 21:49:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-03-10 21:49:33,226 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 16 [2021-03-10 21:49:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:33,226 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-03-10 21:49:33,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-03-10 21:49:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:33,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:33,226 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:33,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:33,439 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash -543344739, now seen corresponding path program 37 times [2021-03-10 21:49:33,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:33,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292090548] [2021-03-10 21:49:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:33,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292090548] [2021-03-10 21:49:33,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564824729] [2021-03-10 21:49:33,575 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 [2021-03-10 21:49:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:33,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:33,790 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:49:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:33,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:33,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:33,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734588687] [2021-03-10 21:49:33,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:33,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:33,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:33,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:33,901 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:34,204 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-03-10 21:49:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:34,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:34,205 INFO L225 Difference]: With dead ends: 115 [2021-03-10 21:49:34,205 INFO L226 Difference]: Without dead ends: 96 [2021-03-10 21:49:34,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:49:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-03-10 21:49:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2021-03-10 21:49:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-03-10 21:49:34,207 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 16 [2021-03-10 21:49:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:34,207 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-03-10 21:49:34,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-03-10 21:49:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:34,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:34,208 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:34,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-03-10 21:49:34,423 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:34,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1081200317, now seen corresponding path program 38 times [2021-03-10 21:49:34,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:34,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994346720] [2021-03-10 21:49:34,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:34,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994346720] [2021-03-10 21:49:34,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54050502] [2021-03-10 21:49:34,548 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 [2021-03-10 21:49:34,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:34,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:34,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:34,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:34,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:34,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030662171] [2021-03-10 21:49:34,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:34,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:34,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:34,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:34,876 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:35,415 INFO L93 Difference]: Finished difference Result 140 states and 265 transitions. [2021-03-10 21:49:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:49:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:35,416 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:49:35,416 INFO L226 Difference]: Without dead ends: 114 [2021-03-10 21:49:35,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 729.4ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:49:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-10 21:49:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2021-03-10 21:49:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-03-10 21:49:35,417 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 16 [2021-03-10 21:49:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:35,418 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-03-10 21:49:35,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-03-10 21:49:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:35,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:35,418 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:35,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:35,631 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -861394220, now seen corresponding path program 39 times [2021-03-10 21:49:35,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:35,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696711135] [2021-03-10 21:49:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:35,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696711135] [2021-03-10 21:49:35,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912884499] [2021-03-10 21:49:35,684 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 [2021-03-10 21:49:35,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:35,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:49:35,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:35,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:35,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:35,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614857541] [2021-03-10 21:49:35,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:35,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:35,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:35,796 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:35,893 INFO L93 Difference]: Finished difference Result 97 states and 197 transitions. [2021-03-10 21:49:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:35,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:35,893 INFO L225 Difference]: With dead ends: 97 [2021-03-10 21:49:35,894 INFO L226 Difference]: Without dead ends: 97 [2021-03-10 21:49:35,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-03-10 21:49:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-03-10 21:49:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-03-10 21:49:35,895 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 16 [2021-03-10 21:49:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:35,895 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-03-10 21:49:35,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-03-10 21:49:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:35,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:35,896 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:36,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-03-10 21:49:36,103 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1305488025, now seen corresponding path program 40 times [2021-03-10 21:49:36,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:36,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226446731] [2021-03-10 21:49:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:36,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226446731] [2021-03-10 21:49:36,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245258320] [2021-03-10 21:49:36,289 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 [2021-03-10 21:49:36,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:36,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:36,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:36,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512321035] [2021-03-10 21:49:36,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:36,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:36,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:36,560 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:36,933 INFO L93 Difference]: Finished difference Result 110 states and 210 transitions. [2021-03-10 21:49:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:36,933 INFO L225 Difference]: With dead ends: 110 [2021-03-10 21:49:36,934 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 21:49:36,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:49:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 21:49:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2021-03-10 21:49:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 84 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 174 transitions. [2021-03-10 21:49:36,935 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 174 transitions. Word has length 16 [2021-03-10 21:49:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:36,935 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 174 transitions. [2021-03-10 21:49:36,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 174 transitions. [2021-03-10 21:49:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:36,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:36,936 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:37,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:37,147 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:37,147 INFO L82 PathProgramCache]: Analyzing trace with hash -271853705, now seen corresponding path program 41 times [2021-03-10 21:49:37,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:37,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789813684] [2021-03-10 21:49:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:37,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789813684] [2021-03-10 21:49:37,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822450980] [2021-03-10 21:49:37,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:37,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:37,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:37,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:37,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:37,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324457399] [2021-03-10 21:49:37,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:37,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:37,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:37,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:37,684 INFO L87 Difference]: Start difference. First operand 85 states and 174 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:38,333 INFO L93 Difference]: Finished difference Result 117 states and 222 transitions. [2021-03-10 21:49:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:49:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:38,334 INFO L225 Difference]: With dead ends: 117 [2021-03-10 21:49:38,334 INFO L226 Difference]: Without dead ends: 100 [2021-03-10 21:49:38,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 909.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-03-10 21:49:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-03-10 21:49:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-03-10 21:49:38,336 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 16 [2021-03-10 21:49:38,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:38,336 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-03-10 21:49:38,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-03-10 21:49:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:38,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:38,336 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:38,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-03-10 21:49:38,549 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1062737625, now seen corresponding path program 42 times [2021-03-10 21:49:38,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:38,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728584946] [2021-03-10 21:49:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:38,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728584946] [2021-03-10 21:49:38,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488064233] [2021-03-10 21:49:38,678 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 [2021-03-10 21:49:38,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:38,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:38,876 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:49:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:39,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:39,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:39,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032944869] [2021-03-10 21:49:39,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:39,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:39,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:39,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:39,054 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:39,574 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-03-10 21:49:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:49:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:39,575 INFO L225 Difference]: With dead ends: 125 [2021-03-10 21:49:39,575 INFO L226 Difference]: Without dead ends: 99 [2021-03-10 21:49:39,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 761.2ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-03-10 21:49:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2021-03-10 21:49:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-03-10 21:49:39,577 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 16 [2021-03-10 21:49:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:39,577 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-03-10 21:49:39,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-03-10 21:49:39,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:39,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:39,577 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:39,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:39,787 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 441687798, now seen corresponding path program 43 times [2021-03-10 21:49:39,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:39,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860947728] [2021-03-10 21:49:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860947728] [2021-03-10 21:49:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091249663] [2021-03-10 21:49:39,831 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 [2021-03-10 21:49:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:39,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:39,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:39,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903787260] [2021-03-10 21:49:39,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:39,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:39,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:39,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:39,924 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:39,983 INFO L93 Difference]: Finished difference Result 101 states and 206 transitions. [2021-03-10 21:49:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:49:39,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:39,984 INFO L225 Difference]: With dead ends: 101 [2021-03-10 21:49:39,984 INFO L226 Difference]: Without dead ends: 101 [2021-03-10 21:49:39,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-03-10 21:49:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2021-03-10 21:49:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-03-10 21:49:39,987 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 16 [2021-03-10 21:49:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:39,987 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-03-10 21:49:39,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-03-10 21:49:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:39,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:39,987 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:40,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-03-10 21:49:40,202 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 234492561, now seen corresponding path program 44 times [2021-03-10 21:49:40,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:40,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381280919] [2021-03-10 21:49:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381280919] [2021-03-10 21:49:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255972219] [2021-03-10 21:49:40,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:40,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:40,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:40,609 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:49:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:40,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:40,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:40,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011961099] [2021-03-10 21:49:40,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:40,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:40,725 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:41,353 INFO L93 Difference]: Finished difference Result 131 states and 245 transitions. [2021-03-10 21:49:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:49:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:41,354 INFO L225 Difference]: With dead ends: 131 [2021-03-10 21:49:41,354 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 21:49:41,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 889.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 21:49:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-03-10 21:49:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-03-10 21:49:41,356 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 16 [2021-03-10 21:49:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:41,356 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-03-10 21:49:41,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-03-10 21:49:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:41,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:41,356 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:41,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-03-10 21:49:41,570 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1031228313, now seen corresponding path program 45 times [2021-03-10 21:49:41,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:41,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934507172] [2021-03-10 21:49:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:41,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934507172] [2021-03-10 21:49:41,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830194868] [2021-03-10 21:49:41,689 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 [2021-03-10 21:49:41,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:41,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:41,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:41,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:41,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206530646] [2021-03-10 21:49:41,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:41,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:41,996 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,566 INFO L93 Difference]: Finished difference Result 168 states and 312 transitions. [2021-03-10 21:49:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:49:42,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,567 INFO L225 Difference]: With dead ends: 168 [2021-03-10 21:49:42,567 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 21:49:42,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 697.5ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 21:49:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2021-03-10 21:49:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 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) [2021-03-10 21:49:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-03-10 21:49:42,569 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 16 [2021-03-10 21:49:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,569 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-03-10 21:49:42,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-03-10 21:49:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:42,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,569 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:42,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:42,779 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1248642377, now seen corresponding path program 46 times [2021-03-10 21:49:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:42,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744157618] [2021-03-10 21:49:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:42,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744157618] [2021-03-10 21:49:42,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404004855] [2021-03-10 21:49:42,928 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) [2021-03-10 21:49:42,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:42,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:42,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:43,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:43,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:43,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171025990] [2021-03-10 21:49:43,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:43,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:43,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:43,173 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:44,075 INFO L93 Difference]: Finished difference Result 161 states and 302 transitions. [2021-03-10 21:49:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:49:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:44,076 INFO L225 Difference]: With dead ends: 161 [2021-03-10 21:49:44,076 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 21:49:44,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 979.2ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:49:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 21:49:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2021-03-10 21:49:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.131868131868132) internal successors, (194), 91 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 194 transitions. [2021-03-10 21:49:44,078 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 194 transitions. Word has length 16 [2021-03-10 21:49:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:44,078 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 194 transitions. [2021-03-10 21:49:44,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 194 transitions. [2021-03-10 21:49:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:44,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:44,078 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:44,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-03-10 21:49:44,294 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:44,294 INFO L82 PathProgramCache]: Analyzing trace with hash -565135694, now seen corresponding path program 47 times [2021-03-10 21:49:44,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:44,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361050963] [2021-03-10 21:49:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:44,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361050963] [2021-03-10 21:49:44,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482910957] [2021-03-10 21:49:44,337 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 [2021-03-10 21:49:44,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:49:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:44,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:44,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:44,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742070638] [2021-03-10 21:49:44,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:44,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:44,503 INFO L87 Difference]: Start difference. First operand 92 states and 194 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:44,544 INFO L93 Difference]: Finished difference Result 98 states and 204 transitions. [2021-03-10 21:49:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:44,545 INFO L225 Difference]: With dead ends: 98 [2021-03-10 21:49:44,545 INFO L226 Difference]: Without dead ends: 98 [2021-03-10 21:49:44,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-03-10 21:49:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2021-03-10 21:49:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 193 transitions. [2021-03-10 21:49:44,547 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 193 transitions. Word has length 16 [2021-03-10 21:49:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:44,547 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 193 transitions. [2021-03-10 21:49:44,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 193 transitions. [2021-03-10 21:49:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:44,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:44,547 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:44,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:44,762 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:44,762 INFO L82 PathProgramCache]: Analyzing trace with hash -451906625, now seen corresponding path program 48 times [2021-03-10 21:49:44,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:44,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909082746] [2021-03-10 21:49:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:44,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909082746] [2021-03-10 21:49:44,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237304243] [2021-03-10 21:49:44,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:44,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:44,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:44,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:45,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:45,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:45,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283646352] [2021-03-10 21:49:45,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:45,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:45,216 INFO L87 Difference]: Start difference. First operand 92 states and 193 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:45,655 INFO L93 Difference]: Finished difference Result 161 states and 306 transitions. [2021-03-10 21:49:45,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:49:45,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:45,656 INFO L225 Difference]: With dead ends: 161 [2021-03-10 21:49:45,656 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 21:49:45,656 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:49:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 21:49:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 93. [2021-03-10 21:49:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-03-10 21:49:45,658 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 16 [2021-03-10 21:49:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:45,658 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-03-10 21:49:45,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-03-10 21:49:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:45,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:45,658 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:45,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:45,867 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:45,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:45,867 INFO L82 PathProgramCache]: Analyzing trace with hash 54439641, now seen corresponding path program 49 times [2021-03-10 21:49:45,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:45,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863127934] [2021-03-10 21:49:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:46,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863127934] [2021-03-10 21:49:46,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639792148] [2021-03-10 21:49:46,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:49:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:46,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:46,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:46,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589215906] [2021-03-10 21:49:46,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:46,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:46,349 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:47,274 INFO L93 Difference]: Finished difference Result 182 states and 342 transitions. [2021-03-10 21:49:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:49:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:47,275 INFO L225 Difference]: With dead ends: 182 [2021-03-10 21:49:47,275 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:49:47,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1064.0ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:49:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:49:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 94. [2021-03-10 21:49:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-03-10 21:49:47,283 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 16 [2021-03-10 21:49:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:47,283 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-03-10 21:49:47,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-03-10 21:49:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:47,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:47,283 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:47,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:47,498 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:47,498 INFO L82 PathProgramCache]: Analyzing trace with hash -12771748, now seen corresponding path program 50 times [2021-03-10 21:49:47,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:47,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173482587] [2021-03-10 21:49:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:47,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173482587] [2021-03-10 21:49:47,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438997539] [2021-03-10 21:49:47,545 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) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:47,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:47,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:47,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:47,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:47,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:47,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:49:47,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069599176] [2021-03-10 21:49:47,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:49:47,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:49:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:47,650 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:47,748 INFO L93 Difference]: Finished difference Result 107 states and 221 transitions. [2021-03-10 21:49:47,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:47,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:47,748 INFO L225 Difference]: With dead ends: 107 [2021-03-10 21:49:47,748 INFO L226 Difference]: Without dead ends: 107 [2021-03-10 21:49:47,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:49:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-03-10 21:49:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2021-03-10 21:49:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 194 transitions. [2021-03-10 21:49:47,750 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 194 transitions. Word has length 16 [2021-03-10 21:49:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:47,750 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 194 transitions. [2021-03-10 21:49:47,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 194 transitions. [2021-03-10 21:49:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:47,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:47,751 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:47,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-03-10 21:49:47,951 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2140856799, now seen corresponding path program 51 times [2021-03-10 21:49:47,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:47,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248955237] [2021-03-10 21:49:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:48,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248955237] [2021-03-10 21:49:48,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371357412] [2021-03-10 21:49:48,138 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 [2021-03-10 21:49:48,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:49:48,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:48,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:48,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:48,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:48,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237768740] [2021-03-10 21:49:48,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:48,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:48,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:48,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:48,465 INFO L87 Difference]: Start difference. First operand 93 states and 194 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:48,866 INFO L93 Difference]: Finished difference Result 109 states and 217 transitions. [2021-03-10 21:49:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:49:48,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:48,872 INFO L225 Difference]: With dead ends: 109 [2021-03-10 21:49:48,872 INFO L226 Difference]: Without dead ends: 96 [2021-03-10 21:49:48,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 717.0ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:49:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-03-10 21:49:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-03-10 21:49:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-03-10 21:49:48,873 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 16 [2021-03-10 21:49:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:48,874 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-03-10 21:49:48,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-03-10 21:49:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:48,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:48,874 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:49,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2021-03-10 21:49:49,074 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:49,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:49,075 INFO L82 PathProgramCache]: Analyzing trace with hash 576768767, now seen corresponding path program 52 times [2021-03-10 21:49:49,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:49,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195971853] [2021-03-10 21:49:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:49,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195971853] [2021-03-10 21:49:49,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831415804] [2021-03-10 21:49:49,200 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 [2021-03-10 21:49:49,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:49,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:49,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:49,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:49,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702318641] [2021-03-10 21:49:49,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:49,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:49,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:49,476 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:50,037 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-03-10 21:49:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:49:50,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:50,038 INFO L225 Difference]: With dead ends: 134 [2021-03-10 21:49:50,038 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 21:49:50,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 706.3ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 21:49:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2021-03-10 21:49:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-03-10 21:49:50,040 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 16 [2021-03-10 21:49:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:50,040 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-03-10 21:49:50,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-03-10 21:49:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:50,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:50,041 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:50,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-03-10 21:49:50,243 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:50,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1911360097, now seen corresponding path program 53 times [2021-03-10 21:49:50,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:50,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626529133] [2021-03-10 21:49:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:50,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626529133] [2021-03-10 21:49:50,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119898042] [2021-03-10 21:49:50,373 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 [2021-03-10 21:49:50,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:49:50,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:50,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:50,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:49:50,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047439612] [2021-03-10 21:49:50,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:49:50,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:50,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:49:50,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:49:50,742 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:51,262 INFO L93 Difference]: Finished difference Result 148 states and 281 transitions. [2021-03-10 21:49:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:49:51,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:51,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:51,263 INFO L225 Difference]: With dead ends: 148 [2021-03-10 21:49:51,263 INFO L226 Difference]: Without dead ends: 129 [2021-03-10 21:49:51,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 735.4ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:49:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-03-10 21:49:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2021-03-10 21:49:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-03-10 21:49:51,265 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 16 [2021-03-10 21:49:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:51,265 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-03-10 21:49:51,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-03-10 21:49:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:51,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:51,265 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:51,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-03-10 21:49:51,479 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1290310270, now seen corresponding path program 54 times [2021-03-10 21:49:51,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:51,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442305315] [2021-03-10 21:49:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:51,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442305315] [2021-03-10 21:49:51,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382085832] [2021-03-10 21:49:51,523 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:51,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:51,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:51,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:51,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:51,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:51,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:51,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440938310] [2021-03-10 21:49:51,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:51,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:51,616 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:51,688 INFO L93 Difference]: Finished difference Result 112 states and 232 transitions. [2021-03-10 21:49:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:49:51,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:51,689 INFO L225 Difference]: With dead ends: 112 [2021-03-10 21:49:51,689 INFO L226 Difference]: Without dead ends: 112 [2021-03-10 21:49:51,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:49:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-03-10 21:49:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-03-10 21:49:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-03-10 21:49:51,690 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 16 [2021-03-10 21:49:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:51,691 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-03-10 21:49:51,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-03-10 21:49:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:51,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:51,691 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:51,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-03-10 21:49:51,906 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1083115033, now seen corresponding path program 55 times [2021-03-10 21:49:51,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:51,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013857118] [2021-03-10 21:49:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:52,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013857118] [2021-03-10 21:49:52,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096340918] [2021-03-10 21:49:52,094 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 [2021-03-10 21:49:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:52,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:52,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:52,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:52,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261207901] [2021-03-10 21:49:52,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:52,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:52,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:52,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:52,356 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:52,979 INFO L93 Difference]: Finished difference Result 146 states and 279 transitions. [2021-03-10 21:49:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:49:52,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:52,980 INFO L225 Difference]: With dead ends: 146 [2021-03-10 21:49:52,980 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 21:49:52,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 771.2ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 21:49:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2021-03-10 21:49:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-03-10 21:49:52,982 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 16 [2021-03-10 21:49:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:52,982 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-03-10 21:49:52,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-03-10 21:49:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:52,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:52,983 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:53,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:53,197 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:53,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1877260933, now seen corresponding path program 56 times [2021-03-10 21:49:53,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:53,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916484587] [2021-03-10 21:49:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:53,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916484587] [2021-03-10 21:49:53,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573020521] [2021-03-10 21:49:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:53,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:53,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:53,565 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:49:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:53,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:53,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:53,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567353175] [2021-03-10 21:49:53,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:53,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:53,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:53,675 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:54,341 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-03-10 21:49:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:49:54,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:54,342 INFO L225 Difference]: With dead ends: 167 [2021-03-10 21:49:54,342 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 21:49:54,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 855.5ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 21:49:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 98. [2021-03-10 21:49:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-03-10 21:49:54,344 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 16 [2021-03-10 21:49:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:54,344 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-03-10 21:49:54,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-03-10 21:49:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:54,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:54,344 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:54,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:54,558 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:54,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:54,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1879850785, now seen corresponding path program 57 times [2021-03-10 21:49:54,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:54,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101206365] [2021-03-10 21:49:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101206365] [2021-03-10 21:49:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314125575] [2021-03-10 21:49:54,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:54,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:54,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:55,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:55,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:55,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316620301] [2021-03-10 21:49:55,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:55,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:55,047 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:55,496 INFO L93 Difference]: Finished difference Result 161 states and 319 transitions. [2021-03-10 21:49:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:49:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:55,497 INFO L225 Difference]: With dead ends: 161 [2021-03-10 21:49:55,497 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 21:49:55,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 21:49:55,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 98. [2021-03-10 21:49:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-03-10 21:49:55,499 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 16 [2021-03-10 21:49:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:55,499 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-03-10 21:49:55,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-03-10 21:49:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:55,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:55,499 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:55,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:55,707 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash -400019905, now seen corresponding path program 58 times [2021-03-10 21:49:55,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:55,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811188975] [2021-03-10 21:49:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:55,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811188975] [2021-03-10 21:49:55,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405768347] [2021-03-10 21:49:55,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:55,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:49:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:56,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:56,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:56,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411338203] [2021-03-10 21:49:56,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:56,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:56,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:56,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:56,152 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:56,850 INFO L93 Difference]: Finished difference Result 134 states and 270 transitions. [2021-03-10 21:49:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:49:56,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:56,851 INFO L225 Difference]: With dead ends: 134 [2021-03-10 21:49:56,851 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 21:49:56,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:49:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 21:49:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-03-10 21:49:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1530612244897958) internal successors, (211), 98 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 211 transitions. [2021-03-10 21:49:56,852 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 211 transitions. Word has length 16 [2021-03-10 21:49:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:56,853 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 211 transitions. [2021-03-10 21:49:56,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 211 transitions. [2021-03-10 21:49:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:56,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:56,853 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:57,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:57,054 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash 283486778, now seen corresponding path program 59 times [2021-03-10 21:49:57,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:57,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526813963] [2021-03-10 21:49:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:57,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526813963] [2021-03-10 21:49:57,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657375926] [2021-03-10 21:49:57,095 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 [2021-03-10 21:49:57,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:49:57,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:49:57,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:49:57,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:57,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:49:57,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056311710] [2021-03-10 21:49:57,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:49:57,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:57,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:49:57,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:57,243 INFO L87 Difference]: Start difference. First operand 99 states and 211 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:57,271 INFO L93 Difference]: Finished difference Result 99 states and 208 transitions. [2021-03-10 21:49:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:49:57,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:57,272 INFO L225 Difference]: With dead ends: 99 [2021-03-10 21:49:57,272 INFO L226 Difference]: Without dead ends: 99 [2021-03-10 21:49:57,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:49:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-03-10 21:49:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2021-03-10 21:49:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1538461538461537) internal successors, (196), 91 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 196 transitions. [2021-03-10 21:49:57,273 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 196 transitions. Word has length 16 [2021-03-10 21:49:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:57,273 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 196 transitions. [2021-03-10 21:49:57,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 196 transitions. [2021-03-10 21:49:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:57,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:57,274 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:57,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:57,475 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash 934571425, now seen corresponding path program 60 times [2021-03-10 21:49:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:57,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175952633] [2021-03-10 21:49:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:57,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175952633] [2021-03-10 21:49:57,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868386448] [2021-03-10 21:49:57,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:57,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:57,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:57,873 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:49:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:57,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:57,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:57,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543455492] [2021-03-10 21:49:57,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:57,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:57,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:57,982 INFO L87 Difference]: Start difference. First operand 92 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:58,664 INFO L93 Difference]: Finished difference Result 150 states and 289 transitions. [2021-03-10 21:49:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:49:58,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:49:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:58,665 INFO L225 Difference]: With dead ends: 150 [2021-03-10 21:49:58,665 INFO L226 Difference]: Without dead ends: 124 [2021-03-10 21:49:58,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 909.8ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:49:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-10 21:49:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-03-10 21:49:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1538461538461537) internal successors, (196), 91 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 196 transitions. [2021-03-10 21:49:58,667 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 196 transitions. Word has length 16 [2021-03-10 21:49:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:58,667 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 196 transitions. [2021-03-10 21:49:58,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 196 transitions. [2021-03-10 21:49:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:49:58,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:58,667 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:58,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-03-10 21:49:58,879 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:58,879 INFO L82 PathProgramCache]: Analyzing trace with hash 396715847, now seen corresponding path program 61 times [2021-03-10 21:49:58,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:58,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089596653] [2021-03-10 21:49:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:59,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089596653] [2021-03-10 21:49:59,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282515209] [2021-03-10 21:49:59,055 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 [2021-03-10 21:49:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:59,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:59,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:59,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:49:59,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465310145] [2021-03-10 21:49:59,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:49:59,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:59,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:49:59,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:49:59,335 INFO L87 Difference]: Start difference. First operand 92 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:59,593 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-03-10 21:50:00,015 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-03-10 21:50:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:00,357 INFO L93 Difference]: Finished difference Result 152 states and 299 transitions. [2021-03-10 21:50:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:00,358 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:50:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:00,358 INFO L225 Difference]: With dead ends: 152 [2021-03-10 21:50:00,358 INFO L226 Difference]: Without dead ends: 123 [2021-03-10 21:50:00,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1219.0ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:50:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-03-10 21:50:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-03-10 21:50:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 204 transitions. [2021-03-10 21:50:00,360 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 204 transitions. Word has length 16 [2021-03-10 21:50:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:00,360 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 204 transitions. [2021-03-10 21:50:00,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 204 transitions. [2021-03-10 21:50:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:50:00,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:00,361 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:00,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:00,561 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:00,561 INFO L82 PathProgramCache]: Analyzing trace with hash 903062113, now seen corresponding path program 62 times [2021-03-10 21:50:00,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:00,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699564006] [2021-03-10 21:50:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:00,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699564006] [2021-03-10 21:50:00,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984859707] [2021-03-10 21:50:00,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:50:00,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:50:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:01,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:01,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:50:01,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411641422] [2021-03-10 21:50:01,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:01,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:01,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:01,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:01,070 INFO L87 Difference]: Start difference. First operand 95 states and 204 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:02,384 INFO L93 Difference]: Finished difference Result 184 states and 352 transitions. [2021-03-10 21:50:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:50:02,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:50:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:02,385 INFO L225 Difference]: With dead ends: 184 [2021-03-10 21:50:02,385 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 21:50:02,385 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1464.9ms TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:50:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 21:50:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-03-10 21:50:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-03-10 21:50:02,387 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 16 [2021-03-10 21:50:02,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:02,387 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-03-10 21:50:02,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:02,387 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-03-10 21:50:02,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:50:02,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:02,388 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:02,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:02,603 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:02,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:02,603 INFO L82 PathProgramCache]: Analyzing trace with hash 444951547, now seen corresponding path program 63 times [2021-03-10 21:50:02,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:02,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918178743] [2021-03-10 21:50:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:02,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918178743] [2021-03-10 21:50:02,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508279829] [2021-03-10 21:50:02,801 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 [2021-03-10 21:50:02,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:02,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:02,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:50:02,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:03,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:03,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:50:03,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500144848] [2021-03-10 21:50:03,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:03,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:03,059 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:03,569 INFO L93 Difference]: Finished difference Result 136 states and 277 transitions. [2021-03-10 21:50:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:50:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:03,570 INFO L225 Difference]: With dead ends: 136 [2021-03-10 21:50:03,570 INFO L226 Difference]: Without dead ends: 129 [2021-03-10 21:50:03,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-03-10 21:50:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2021-03-10 21:50:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.176470588235294) internal successors, (222), 102 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-03-10 21:50:03,572 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 16 [2021-03-10 21:50:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:03,572 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-03-10 21:50:03,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-03-10 21:50:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:50:03,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:03,573 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:03,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:03,787 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:03,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1779542877, now seen corresponding path program 64 times [2021-03-10 21:50:03,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:03,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254773209] [2021-03-10 21:50:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:03,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254773209] [2021-03-10 21:50:03,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417695373] [2021-03-10 21:50:03,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:03,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:03,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:03,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:50:03,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:04,155 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:50:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:04,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:04,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:50:04,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051010538] [2021-03-10 21:50:04,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:04,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:04,261 INFO L87 Difference]: Start difference. First operand 103 states and 222 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:04,851 INFO L93 Difference]: Finished difference Result 151 states and 300 transitions. [2021-03-10 21:50:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:04,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:50:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:04,852 INFO L225 Difference]: With dead ends: 151 [2021-03-10 21:50:04,852 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 21:50:04,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:50:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 21:50:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2021-03-10 21:50:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-03-10 21:50:04,854 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 16 [2021-03-10 21:50:04,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:04,854 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-03-10 21:50:04,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-03-10 21:50:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:50:04,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:04,854 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:05,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:05,055 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1241687299, now seen corresponding path program 65 times [2021-03-10 21:50:05,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:05,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126685722] [2021-03-10 21:50:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:05,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126685722] [2021-03-10 21:50:05,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977248710] [2021-03-10 21:50:05,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:05,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:05,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:50:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:05,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:05,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:50:05,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955335689] [2021-03-10 21:50:05,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:50:05,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:50:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:05,529 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:06,202 INFO L93 Difference]: Finished difference Result 154 states and 313 transitions. [2021-03-10 21:50:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:50:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:50:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:06,202 INFO L225 Difference]: With dead ends: 154 [2021-03-10 21:50:06,203 INFO L226 Difference]: Without dead ends: 134 [2021-03-10 21:50:06,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 850.2ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:50:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-03-10 21:50:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-03-10 21:50:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-03-10 21:50:06,204 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-03-10 21:50:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:06,204 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-03-10 21:50:06,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-03-10 21:50:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:50:06,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:06,205 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:06,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-03-10 21:50:06,419 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:06,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1748033565, now seen corresponding path program 66 times [2021-03-10 21:50:06,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:06,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554386172] [2021-03-10 21:50:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:06,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554386172] [2021-03-10 21:50:06,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125540113] [2021-03-10 21:50:06,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:06,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:06,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:50:06,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:06,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:06,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:50:06,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366338336] [2021-03-10 21:50:06,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:06,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:06,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:06,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:06,893 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:07,804 INFO L93 Difference]: Finished difference Result 154 states and 309 transitions. [2021-03-10 21:50:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:50:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:07,805 INFO L225 Difference]: With dead ends: 154 [2021-03-10 21:50:07,805 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:50:07,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1078.3ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:50:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:50:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-03-10 21:50:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.1714285714285713) internal successors, (228), 105 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 228 transitions. [2021-03-10 21:50:07,806 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 228 transitions. Word has length 16 [2021-03-10 21:50:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:07,806 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 228 transitions. [2021-03-10 21:50:07,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 228 transitions. [2021-03-10 21:50:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:50:07,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:07,807 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:08,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-03-10 21:50:08,021 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2104034591, now seen corresponding path program 67 times [2021-03-10 21:50:08,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:08,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940689102] [2021-03-10 21:50:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:08,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940689102] [2021-03-10 21:50:08,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278157634] [2021-03-10 21:50:08,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:50:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:08,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:08,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:50:08,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680560587] [2021-03-10 21:50:08,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:50:08,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:08,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:50:08,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:08,537 INFO L87 Difference]: Start difference. First operand 106 states and 228 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:08,871 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-10 21:50:09,454 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2021-03-10 21:50:09,700 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-03-10 21:50:09,840 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2021-03-10 21:50:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:09,852 INFO L93 Difference]: Finished difference Result 188 states and 372 transitions. [2021-03-10 21:50:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:50:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:09,853 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:50:09,854 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 21:50:09,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1495.4ms TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:50:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 21:50:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2021-03-10 21:50:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1636363636363636) internal successors, (238), 110 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 238 transitions. [2021-03-10 21:50:09,855 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 238 transitions. Word has length 16 [2021-03-10 21:50:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:09,855 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 238 transitions. [2021-03-10 21:50:09,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 238 transitions. [2021-03-10 21:50:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:09,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:09,856 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:10,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:10,071 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash -570507776, now seen corresponding path program 68 times [2021-03-10 21:50:10,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:10,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518608822] [2021-03-10 21:50:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:10,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518608822] [2021-03-10 21:50:10,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454036913] [2021-03-10 21:50:10,141 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 [2021-03-10 21:50:10,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:10,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:10,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:10,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:10,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716975451] [2021-03-10 21:50:10,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:10,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:10,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:10,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:10,308 INFO L87 Difference]: Start difference. First operand 111 states and 238 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:10,507 INFO L93 Difference]: Finished difference Result 160 states and 332 transitions. [2021-03-10 21:50:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:10,508 INFO L225 Difference]: With dead ends: 160 [2021-03-10 21:50:10,508 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 21:50:10,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 21:50:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2021-03-10 21:50:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-03-10 21:50:10,510 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-03-10 21:50:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:10,510 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-03-10 21:50:10,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-03-10 21:50:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:10,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:10,511 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:10,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-03-10 21:50:10,715 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:10,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1010264140, now seen corresponding path program 69 times [2021-03-10 21:50:10,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:10,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523269677] [2021-03-10 21:50:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:10,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523269677] [2021-03-10 21:50:10,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206444401] [2021-03-10 21:50:10,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:10,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:10,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:10,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:10,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:10,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299309656] [2021-03-10 21:50:10,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:10,952 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:11,294 INFO L93 Difference]: Finished difference Result 166 states and 344 transitions. [2021-03-10 21:50:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:11,294 INFO L225 Difference]: With dead ends: 166 [2021-03-10 21:50:11,295 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:50:11,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:50:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2021-03-10 21:50:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-03-10 21:50:11,296 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-03-10 21:50:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:11,297 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-03-10 21:50:11,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-03-10 21:50:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:11,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:11,297 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:11,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:11,511 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:11,511 INFO L82 PathProgramCache]: Analyzing trace with hash -60731324, now seen corresponding path program 70 times [2021-03-10 21:50:11,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:11,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732333941] [2021-03-10 21:50:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:11,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732333941] [2021-03-10 21:50:11,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900246421] [2021-03-10 21:50:11,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:11,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:11,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:11,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:11,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:11,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376129673] [2021-03-10 21:50:11,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:11,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:11,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:11,764 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:12,152 INFO L93 Difference]: Finished difference Result 163 states and 338 transitions. [2021-03-10 21:50:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:12,153 INFO L225 Difference]: With dead ends: 163 [2021-03-10 21:50:12,153 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 21:50:12,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 21:50:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-03-10 21:50:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-03-10 21:50:12,155 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-03-10 21:50:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:12,155 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-03-10 21:50:12,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-03-10 21:50:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:12,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:12,155 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:12,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:12,356 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:12,356 INFO L82 PathProgramCache]: Analyzing trace with hash 736004428, now seen corresponding path program 71 times [2021-03-10 21:50:12,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:12,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994628737] [2021-03-10 21:50:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:12,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994628737] [2021-03-10 21:50:12,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961626362] [2021-03-10 21:50:12,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:12,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:12,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:12,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:12,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:12,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:12,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:12,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202198747] [2021-03-10 21:50:12,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:12,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:12,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:12,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:12,609 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:13,118 INFO L93 Difference]: Finished difference Result 168 states and 343 transitions. [2021-03-10 21:50:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:13,119 INFO L225 Difference]: With dead ends: 168 [2021-03-10 21:50:13,119 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 21:50:13,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 555.5ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:50:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 21:50:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 114. [2021-03-10 21:50:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-03-10 21:50:13,122 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-03-10 21:50:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:13,122 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-03-10 21:50:13,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-03-10 21:50:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:13,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:13,122 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:13,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-03-10 21:50:13,323 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:13,323 INFO L82 PathProgramCache]: Analyzing trace with hash 528809191, now seen corresponding path program 72 times [2021-03-10 21:50:13,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:13,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109506960] [2021-03-10 21:50:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109506960] [2021-03-10 21:50:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318587694] [2021-03-10 21:50:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:13,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:13,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:13,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:13,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:13,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669422342] [2021-03-10 21:50:13,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:13,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:13,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:13,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:13,746 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:14,746 INFO L93 Difference]: Finished difference Result 172 states and 346 transitions. [2021-03-10 21:50:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:14,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:14,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:14,747 INFO L225 Difference]: With dead ends: 172 [2021-03-10 21:50:14,747 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 21:50:14,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1195.9ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:50:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 21:50:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 115. [2021-03-10 21:50:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 114 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 246 transitions. [2021-03-10 21:50:14,749 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 246 transitions. Word has length 17 [2021-03-10 21:50:14,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:14,749 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 246 transitions. [2021-03-10 21:50:14,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 246 transitions. [2021-03-10 21:50:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:14,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:14,750 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:14,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:14,967 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1863400521, now seen corresponding path program 73 times [2021-03-10 21:50:14,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:14,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758190761] [2021-03-10 21:50:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:15,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758190761] [2021-03-10 21:50:15,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897328253] [2021-03-10 21:50:15,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:15,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:15,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:15,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:15,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414316226] [2021-03-10 21:50:15,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:15,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:15,309 INFO L87 Difference]: Start difference. First operand 115 states and 246 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:15,791 INFO L93 Difference]: Finished difference Result 152 states and 314 transitions. [2021-03-10 21:50:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:15,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:15,791 INFO L225 Difference]: With dead ends: 152 [2021-03-10 21:50:15,792 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 21:50:15,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 630.9ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 21:50:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2021-03-10 21:50:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-03-10 21:50:15,793 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-03-10 21:50:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:15,793 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-03-10 21:50:15,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-03-10 21:50:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:15,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:15,794 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:16,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:16,009 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1172274526, now seen corresponding path program 74 times [2021-03-10 21:50:16,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:16,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755966837] [2021-03-10 21:50:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755966837] [2021-03-10 21:50:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036004266] [2021-03-10 21:50:16,089 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 [2021-03-10 21:50:16,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:16,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:16,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:16,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:16,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:16,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480068474] [2021-03-10 21:50:16,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:16,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:16,242 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:16,487 INFO L93 Difference]: Finished difference Result 138 states and 290 transitions. [2021-03-10 21:50:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:16,488 INFO L225 Difference]: With dead ends: 138 [2021-03-10 21:50:16,488 INFO L226 Difference]: Without dead ends: 138 [2021-03-10 21:50:16,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:50:16,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-03-10 21:50:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2021-03-10 21:50:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 114 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 246 transitions. [2021-03-10 21:50:16,490 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 246 transitions. Word has length 17 [2021-03-10 21:50:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:16,490 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 246 transitions. [2021-03-10 21:50:16,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 246 transitions. [2021-03-10 21:50:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:16,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:16,490 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:16,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-03-10 21:50:16,691 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2051697306, now seen corresponding path program 75 times [2021-03-10 21:50:16,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:16,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278856549] [2021-03-10 21:50:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:16,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278856549] [2021-03-10 21:50:16,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462287360] [2021-03-10 21:50:16,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:16,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:16,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:16,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:16,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286377262] [2021-03-10 21:50:16,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:16,957 INFO L87 Difference]: Start difference. First operand 115 states and 246 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:17,231 INFO L93 Difference]: Finished difference Result 148 states and 310 transitions. [2021-03-10 21:50:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:17,232 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:17,232 INFO L225 Difference]: With dead ends: 148 [2021-03-10 21:50:17,233 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 21:50:17,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:50:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 21:50:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2021-03-10 21:50:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1565217391304348) internal successors, (248), 115 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) [2021-03-10 21:50:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 248 transitions. [2021-03-10 21:50:17,234 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 248 transitions. Word has length 17 [2021-03-10 21:50:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:17,234 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 248 transitions. [2021-03-10 21:50:17,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 248 transitions. [2021-03-10 21:50:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:17,235 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:17,235 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:17,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:17,437 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:17,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:17,438 INFO L82 PathProgramCache]: Analyzing trace with hash -319138145, now seen corresponding path program 76 times [2021-03-10 21:50:17,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:17,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919019348] [2021-03-10 21:50:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:17,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919019348] [2021-03-10 21:50:17,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146217218] [2021-03-10 21:50:17,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:50:17,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:17,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:17,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:17,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419743321] [2021-03-10 21:50:17,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:17,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:17,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:17,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:17,783 INFO L87 Difference]: Start difference. First operand 116 states and 248 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:18,009 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2021-03-10 21:50:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:50:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:18,009 INFO L225 Difference]: With dead ends: 132 [2021-03-10 21:50:18,009 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 21:50:18,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 21:50:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2021-03-10 21:50:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-03-10 21:50:18,011 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 17 [2021-03-10 21:50:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:18,011 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-03-10 21:50:18,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-03-10 21:50:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:18,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:18,012 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:18,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:18,212 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 568562368, now seen corresponding path program 77 times [2021-03-10 21:50:18,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:18,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281764126] [2021-03-10 21:50:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:18,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281764126] [2021-03-10 21:50:18,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386589804] [2021-03-10 21:50:18,312 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 [2021-03-10 21:50:18,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:18,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:18,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:18,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:18,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:18,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152794237] [2021-03-10 21:50:18,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:18,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:18,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:18,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:18,472 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:18,618 INFO L93 Difference]: Finished difference Result 140 states and 294 transitions. [2021-03-10 21:50:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:18,619 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:50:18,619 INFO L226 Difference]: Without dead ends: 140 [2021-03-10 21:50:18,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-03-10 21:50:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2021-03-10 21:50:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-03-10 21:50:18,621 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 17 [2021-03-10 21:50:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:18,621 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-03-10 21:50:18,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-03-10 21:50:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:18,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:18,621 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:18,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-03-10 21:50:18,822 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:18,822 INFO L82 PathProgramCache]: Analyzing trace with hash 525452262, now seen corresponding path program 78 times [2021-03-10 21:50:18,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:18,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109122693] [2021-03-10 21:50:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:18,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109122693] [2021-03-10 21:50:18,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300015743] [2021-03-10 21:50:18,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:18,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:18,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:18,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:18,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:19,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:19,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:19,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9163370] [2021-03-10 21:50:19,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:19,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:19,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:19,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:19,095 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:19,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:19,294 INFO L93 Difference]: Finished difference Result 142 states and 299 transitions. [2021-03-10 21:50:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:19,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:19,295 INFO L225 Difference]: With dead ends: 142 [2021-03-10 21:50:19,295 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 21:50:19,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:19,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 21:50:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-03-10 21:50:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-03-10 21:50:19,297 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 17 [2021-03-10 21:50:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:19,297 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-03-10 21:50:19,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-03-10 21:50:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:19,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:19,297 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:19,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:19,513 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:19,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1802273083, now seen corresponding path program 79 times [2021-03-10 21:50:19,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:19,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529245567] [2021-03-10 21:50:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:19,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529245567] [2021-03-10 21:50:19,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659934884] [2021-03-10 21:50:19,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:19,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:19,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:19,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:19,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270571208] [2021-03-10 21:50:19,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:19,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:19,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:19,877 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:20,085 INFO L93 Difference]: Finished difference Result 141 states and 296 transitions. [2021-03-10 21:50:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:20,085 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:20,086 INFO L225 Difference]: With dead ends: 141 [2021-03-10 21:50:20,086 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 21:50:20,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 21:50:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2021-03-10 21:50:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1565217391304348) internal successors, (248), 115 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) [2021-03-10 21:50:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 248 transitions. [2021-03-10 21:50:20,088 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 248 transitions. Word has length 17 [2021-03-10 21:50:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:20,088 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 248 transitions. [2021-03-10 21:50:20,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 248 transitions. [2021-03-10 21:50:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:20,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:20,088 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:20,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:20,289 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1295926817, now seen corresponding path program 80 times [2021-03-10 21:50:20,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:20,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363909223] [2021-03-10 21:50:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:20,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363909223] [2021-03-10 21:50:20,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692202213] [2021-03-10 21:50:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:20,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:20,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:20,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:20,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306501142] [2021-03-10 21:50:20,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:20,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:20,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:20,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:20,651 INFO L87 Difference]: Start difference. First operand 116 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:21,155 INFO L93 Difference]: Finished difference Result 183 states and 368 transitions. [2021-03-10 21:50:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:21,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:21,156 INFO L225 Difference]: With dead ends: 183 [2021-03-10 21:50:21,157 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 21:50:21,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 670.8ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 21:50:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 118. [2021-03-10 21:50:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1794871794871793) internal successors, (255), 117 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 255 transitions. [2021-03-10 21:50:21,158 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 255 transitions. Word has length 17 [2021-03-10 21:50:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:21,159 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 255 transitions. [2021-03-10 21:50:21,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 255 transitions. [2021-03-10 21:50:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:21,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:21,159 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:21,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:21,367 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:21,368 INFO L82 PathProgramCache]: Analyzing trace with hash 199159296, now seen corresponding path program 81 times [2021-03-10 21:50:21,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:21,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665273997] [2021-03-10 21:50:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:21,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665273997] [2021-03-10 21:50:21,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262481252] [2021-03-10 21:50:21,480 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 [2021-03-10 21:50:21,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:21,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:21,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:21,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:21,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803162576] [2021-03-10 21:50:21,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:21,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:21,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:21,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:21,683 INFO L87 Difference]: Start difference. First operand 118 states and 255 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:21,881 INFO L93 Difference]: Finished difference Result 153 states and 308 transitions. [2021-03-10 21:50:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:21,882 INFO L225 Difference]: With dead ends: 153 [2021-03-10 21:50:21,882 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:50:21,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:50:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2021-03-10 21:50:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1463414634146343) internal successors, (264), 123 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 264 transitions. [2021-03-10 21:50:21,883 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 264 transitions. Word has length 17 [2021-03-10 21:50:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:21,884 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 264 transitions. [2021-03-10 21:50:21,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 264 transitions. [2021-03-10 21:50:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:21,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:21,884 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:22,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-03-10 21:50:22,100 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1833782395, now seen corresponding path program 82 times [2021-03-10 21:50:22,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:22,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084791016] [2021-03-10 21:50:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:22,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084791016] [2021-03-10 21:50:22,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459312047] [2021-03-10 21:50:22,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:22,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:22,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:22,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:22,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:22,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:22,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:22,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942889968] [2021-03-10 21:50:22,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:22,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:22,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:22,346 INFO L87 Difference]: Start difference. First operand 124 states and 264 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:22,556 INFO L93 Difference]: Finished difference Result 157 states and 325 transitions. [2021-03-10 21:50:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:22,558 INFO L225 Difference]: With dead ends: 157 [2021-03-10 21:50:22,558 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 21:50:22,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 261.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 21:50:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 122. [2021-03-10 21:50:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 257 transitions. [2021-03-10 21:50:22,560 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 257 transitions. Word has length 17 [2021-03-10 21:50:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:22,560 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 257 transitions. [2021-03-10 21:50:22,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 257 transitions. [2021-03-10 21:50:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:22,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:22,560 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:22,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:22,764 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash -111496436, now seen corresponding path program 83 times [2021-03-10 21:50:22,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:22,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832132891] [2021-03-10 21:50:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:22,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832132891] [2021-03-10 21:50:22,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950586262] [2021-03-10 21:50:22,852 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 [2021-03-10 21:50:22,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:22,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:22,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:23,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:23,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:23,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551037725] [2021-03-10 21:50:23,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:23,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:23,015 INFO L87 Difference]: Start difference. First operand 122 states and 257 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:23,189 INFO L93 Difference]: Finished difference Result 135 states and 283 transitions. [2021-03-10 21:50:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:50:23,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:23,190 INFO L225 Difference]: With dead ends: 135 [2021-03-10 21:50:23,190 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 21:50:23,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 21:50:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2021-03-10 21:50:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 257 transitions. [2021-03-10 21:50:23,192 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 257 transitions. Word has length 17 [2021-03-10 21:50:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:23,192 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 257 transitions. [2021-03-10 21:50:23,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 257 transitions. [2021-03-10 21:50:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:23,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:23,193 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:23,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-03-10 21:50:23,403 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:23,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1182491900, now seen corresponding path program 84 times [2021-03-10 21:50:23,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:23,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599697784] [2021-03-10 21:50:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:23,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599697784] [2021-03-10 21:50:23,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568834856] [2021-03-10 21:50:23,476 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 [2021-03-10 21:50:23,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:23,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:23,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:23,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:23,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:23,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:23,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888483197] [2021-03-10 21:50:23,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:23,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:23,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:23,660 INFO L87 Difference]: Start difference. First operand 122 states and 257 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:23,986 INFO L93 Difference]: Finished difference Result 144 states and 301 transitions. [2021-03-10 21:50:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:23,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:23,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:23,987 INFO L225 Difference]: With dead ends: 144 [2021-03-10 21:50:23,987 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 21:50:23,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 21:50:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2021-03-10 21:50:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 257 transitions. [2021-03-10 21:50:23,989 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 257 transitions. Word has length 17 [2021-03-10 21:50:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:23,989 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 257 transitions. [2021-03-10 21:50:23,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 257 transitions. [2021-03-10 21:50:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:23,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:23,989 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:24,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-03-10 21:50:24,190 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:24,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:24,190 INFO L82 PathProgramCache]: Analyzing trace with hash 741639945, now seen corresponding path program 85 times [2021-03-10 21:50:24,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:24,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283621836] [2021-03-10 21:50:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:24,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283621836] [2021-03-10 21:50:24,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101319128] [2021-03-10 21:50:24,276 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 [2021-03-10 21:50:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:24,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:24,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:24,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514936744] [2021-03-10 21:50:24,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:24,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:24,535 INFO L87 Difference]: Start difference. First operand 122 states and 257 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:24,774 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-03-10 21:50:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:24,775 INFO L225 Difference]: With dead ends: 139 [2021-03-10 21:50:24,775 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 21:50:24,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 21:50:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2021-03-10 21:50:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1260504201680672) internal successors, (253), 119 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 253 transitions. [2021-03-10 21:50:24,777 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 253 transitions. Word has length 17 [2021-03-10 21:50:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:24,777 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 253 transitions. [2021-03-10 21:50:24,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 253 transitions. [2021-03-10 21:50:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:24,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:24,778 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:24,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:24,978 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:24,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1629340458, now seen corresponding path program 86 times [2021-03-10 21:50:24,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:24,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906342581] [2021-03-10 21:50:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:25,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906342581] [2021-03-10 21:50:25,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472633068] [2021-03-10 21:50:25,082 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 [2021-03-10 21:50:25,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:25,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:25,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:25,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:25,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:25,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:25,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112384500] [2021-03-10 21:50:25,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:25,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:25,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:25,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:25,234 INFO L87 Difference]: Start difference. First operand 120 states and 253 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:25,378 INFO L93 Difference]: Finished difference Result 138 states and 289 transitions. [2021-03-10 21:50:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:25,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:25,379 INFO L225 Difference]: With dead ends: 138 [2021-03-10 21:50:25,379 INFO L226 Difference]: Without dead ends: 138 [2021-03-10 21:50:25,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-03-10 21:50:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2021-03-10 21:50:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1260504201680672) internal successors, (253), 119 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 253 transitions. [2021-03-10 21:50:25,381 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 253 transitions. Word has length 17 [2021-03-10 21:50:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:25,381 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 253 transitions. [2021-03-10 21:50:25,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 253 transitions. [2021-03-10 21:50:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:25,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:25,382 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:25,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-03-10 21:50:25,595 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:25,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1868891086, now seen corresponding path program 87 times [2021-03-10 21:50:25,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:25,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470060066] [2021-03-10 21:50:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:25,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470060066] [2021-03-10 21:50:25,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599106640] [2021-03-10 21:50:25,702 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 [2021-03-10 21:50:25,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:25,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:50:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:25,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:25,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:25,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735388490] [2021-03-10 21:50:25,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:25,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:25,917 INFO L87 Difference]: Start difference. First operand 120 states and 253 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:26,247 INFO L93 Difference]: Finished difference Result 152 states and 312 transitions. [2021-03-10 21:50:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:26,248 INFO L225 Difference]: With dead ends: 152 [2021-03-10 21:50:26,248 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 21:50:26,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:50:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 21:50:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 120. [2021-03-10 21:50:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1176470588235294) internal successors, (252), 119 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 252 transitions. [2021-03-10 21:50:26,250 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 252 transitions. Word has length 17 [2021-03-10 21:50:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:26,250 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 252 transitions. [2021-03-10 21:50:26,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 252 transitions. [2021-03-10 21:50:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:26,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:26,250 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:26,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-03-10 21:50:26,463 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:26,463 INFO L82 PathProgramCache]: Analyzing trace with hash -741494993, now seen corresponding path program 88 times [2021-03-10 21:50:26,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:26,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399376968] [2021-03-10 21:50:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:26,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399376968] [2021-03-10 21:50:26,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275045765] [2021-03-10 21:50:26,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:26,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:26,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:26,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:26,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:26,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:26,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135446189] [2021-03-10 21:50:26,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:26,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:26,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:26,802 INFO L87 Difference]: Start difference. First operand 120 states and 252 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:26,978 INFO L93 Difference]: Finished difference Result 138 states and 285 transitions. [2021-03-10 21:50:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:26,979 INFO L225 Difference]: With dead ends: 138 [2021-03-10 21:50:26,979 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 21:50:26,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 21:50:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2021-03-10 21:50:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-03-10 21:50:26,981 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 17 [2021-03-10 21:50:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:26,981 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-03-10 21:50:26,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-03-10 21:50:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:26,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:26,981 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:27,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:27,195 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:27,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1362544820, now seen corresponding path program 89 times [2021-03-10 21:50:27,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:27,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963695179] [2021-03-10 21:50:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:27,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963695179] [2021-03-10 21:50:27,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175905664] [2021-03-10 21:50:27,297 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 [2021-03-10 21:50:27,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:27,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:27,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:27,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:27,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:27,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640970362] [2021-03-10 21:50:27,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:27,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:27,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:27,522 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:27,729 INFO L93 Difference]: Finished difference Result 148 states and 300 transitions. [2021-03-10 21:50:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:27,730 INFO L225 Difference]: With dead ends: 148 [2021-03-10 21:50:27,730 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 21:50:27,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 21:50:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2021-03-10 21:50:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1176470588235294) internal successors, (252), 119 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 252 transitions. [2021-03-10 21:50:27,732 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 252 transitions. Word has length 17 [2021-03-10 21:50:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:27,732 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 252 transitions. [2021-03-10 21:50:27,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 252 transitions. [2021-03-10 21:50:27,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:27,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:27,732 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:27,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:27,947 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1074994585, now seen corresponding path program 90 times [2021-03-10 21:50:27,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:27,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363974163] [2021-03-10 21:50:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:28,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363974163] [2021-03-10 21:50:28,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20876106] [2021-03-10 21:50:28,056 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 [2021-03-10 21:50:28,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:28,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:28,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:28,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:28,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219807935] [2021-03-10 21:50:28,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:28,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:28,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:28,219 INFO L87 Difference]: Start difference. First operand 120 states and 252 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:28,441 INFO L93 Difference]: Finished difference Result 181 states and 363 transitions. [2021-03-10 21:50:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:28,442 INFO L225 Difference]: With dead ends: 181 [2021-03-10 21:50:28,442 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 21:50:28,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 21:50:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 121. [2021-03-10 21:50:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 120 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 257 transitions. [2021-03-10 21:50:28,444 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 257 transitions. Word has length 17 [2021-03-10 21:50:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:28,444 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 257 transitions. [2021-03-10 21:50:28,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 257 transitions. [2021-03-10 21:50:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:28,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:28,445 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:28,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:28,655 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1259937386, now seen corresponding path program 91 times [2021-03-10 21:50:28,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:28,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697118941] [2021-03-10 21:50:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:28,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697118941] [2021-03-10 21:50:28,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261743593] [2021-03-10 21:50:28,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:28,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:28,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:28,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447775012] [2021-03-10 21:50:28,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:28,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:28,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:28,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:28,965 INFO L87 Difference]: Start difference. First operand 121 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:29,118 INFO L93 Difference]: Finished difference Result 135 states and 280 transitions. [2021-03-10 21:50:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:29,119 INFO L225 Difference]: With dead ends: 135 [2021-03-10 21:50:29,119 INFO L226 Difference]: Without dead ends: 129 [2021-03-10 21:50:29,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-03-10 21:50:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2021-03-10 21:50:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1333333333333333) internal successors, (256), 120 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 256 transitions. [2021-03-10 21:50:29,120 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 256 transitions. Word has length 17 [2021-03-10 21:50:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:29,121 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 256 transitions. [2021-03-10 21:50:29,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 256 transitions. [2021-03-10 21:50:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:29,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:29,121 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:29,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-03-10 21:50:29,331 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash -773004305, now seen corresponding path program 92 times [2021-03-10 21:50:29,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:29,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746331436] [2021-03-10 21:50:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:29,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746331436] [2021-03-10 21:50:29,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150119646] [2021-03-10 21:50:29,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:29,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:29,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:29,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:29,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:29,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:29,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216464398] [2021-03-10 21:50:29,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:29,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:29,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:29,628 INFO L87 Difference]: Start difference. First operand 121 states and 256 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:29,786 INFO L93 Difference]: Finished difference Result 143 states and 297 transitions. [2021-03-10 21:50:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:29,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:29,787 INFO L225 Difference]: With dead ends: 143 [2021-03-10 21:50:29,787 INFO L226 Difference]: Without dead ends: 143 [2021-03-10 21:50:29,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-03-10 21:50:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2021-03-10 21:50:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-03-10 21:50:29,789 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 17 [2021-03-10 21:50:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:29,789 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-03-10 21:50:29,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-03-10 21:50:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:29,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:29,790 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:29,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:29,990 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1398169660, now seen corresponding path program 93 times [2021-03-10 21:50:29,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:29,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023915419] [2021-03-10 21:50:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:30,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023915419] [2021-03-10 21:50:30,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748661736] [2021-03-10 21:50:30,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:30,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:50:30,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:30,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:30,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:30,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:30,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468382029] [2021-03-10 21:50:30,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:30,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:30,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:30,276 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:30,397 INFO L93 Difference]: Finished difference Result 137 states and 285 transitions. [2021-03-10 21:50:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:30,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:30,398 INFO L225 Difference]: With dead ends: 137 [2021-03-10 21:50:30,398 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 21:50:30,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 21:50:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2021-03-10 21:50:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-03-10 21:50:30,400 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 17 [2021-03-10 21:50:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:30,400 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-03-10 21:50:30,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-03-10 21:50:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:30,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:30,400 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:30,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-03-10 21:50:30,601 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:30,601 INFO L82 PathProgramCache]: Analyzing trace with hash -601433908, now seen corresponding path program 94 times [2021-03-10 21:50:30,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:30,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820154248] [2021-03-10 21:50:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:30,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820154248] [2021-03-10 21:50:30,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669478939] [2021-03-10 21:50:30,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:30,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:30,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:30,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:30,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101337310] [2021-03-10 21:50:30,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:30,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:30,879 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:31,039 INFO L93 Difference]: Finished difference Result 150 states and 307 transitions. [2021-03-10 21:50:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:31,040 INFO L225 Difference]: With dead ends: 150 [2021-03-10 21:50:31,040 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:50:31,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:50:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2021-03-10 21:50:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1025641025641026) internal successors, (246), 117 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 246 transitions. [2021-03-10 21:50:31,042 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 246 transitions. Word has length 17 [2021-03-10 21:50:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:31,042 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 246 transitions. [2021-03-10 21:50:31,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 246 transitions. [2021-03-10 21:50:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:31,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:31,042 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:31,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:31,247 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash 525962185, now seen corresponding path program 95 times [2021-03-10 21:50:31,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:31,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150910857] [2021-03-10 21:50:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:31,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150910857] [2021-03-10 21:50:31,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554002007] [2021-03-10 21:50:31,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:31,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:31,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:31,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:31,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:31,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:31,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:31,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506202757] [2021-03-10 21:50:31,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:31,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:31,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:31,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:31,616 INFO L87 Difference]: Start difference. First operand 118 states and 246 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:31,731 INFO L93 Difference]: Finished difference Result 128 states and 265 transitions. [2021-03-10 21:50:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:31,731 INFO L225 Difference]: With dead ends: 128 [2021-03-10 21:50:31,731 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 21:50:31,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 21:50:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 113. [2021-03-10 21:50:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-03-10 21:50:31,733 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 17 [2021-03-10 21:50:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:31,733 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-03-10 21:50:31,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-03-10 21:50:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:31,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:31,734 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:31,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:31,947 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:31,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:31,947 INFO L82 PathProgramCache]: Analyzing trace with hash -95087642, now seen corresponding path program 96 times [2021-03-10 21:50:31,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:31,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728031587] [2021-03-10 21:50:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:32,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728031587] [2021-03-10 21:50:32,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916974080] [2021-03-10 21:50:32,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:32,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:32,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:32,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:32,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:32,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000618713] [2021-03-10 21:50:32,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:32,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:32,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:32,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:32,263 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:32,587 INFO L93 Difference]: Finished difference Result 151 states and 311 transitions. [2021-03-10 21:50:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:32,588 INFO L225 Difference]: With dead ends: 151 [2021-03-10 21:50:32,588 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 21:50:32,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 21:50:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2021-03-10 21:50:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-03-10 21:50:32,590 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 17 [2021-03-10 21:50:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:32,590 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-03-10 21:50:32,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-03-10 21:50:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:32,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:32,590 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:32,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-03-10 21:50:32,791 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash 192462593, now seen corresponding path program 97 times [2021-03-10 21:50:32,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:32,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901936379] [2021-03-10 21:50:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:32,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901936379] [2021-03-10 21:50:32,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068133817] [2021-03-10 21:50:32,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:50:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:32,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:33,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:33,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:33,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007700554] [2021-03-10 21:50:33,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:33,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:33,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:33,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:33,064 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:33,337 INFO L93 Difference]: Finished difference Result 159 states and 323 transitions. [2021-03-10 21:50:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:33,337 INFO L225 Difference]: With dead ends: 159 [2021-03-10 21:50:33,337 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 21:50:33,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:50:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 21:50:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 117. [2021-03-10 21:50:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-03-10 21:50:33,339 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 17 [2021-03-10 21:50:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:33,339 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-03-10 21:50:33,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-03-10 21:50:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:33,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:33,339 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:33,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:33,540 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:33,540 INFO L82 PathProgramCache]: Analyzing trace with hash 494452873, now seen corresponding path program 98 times [2021-03-10 21:50:33,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:33,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485673936] [2021-03-10 21:50:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:33,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485673936] [2021-03-10 21:50:33,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410937786] [2021-03-10 21:50:33,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:33,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:33,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:33,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:33,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:33,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91857635] [2021-03-10 21:50:33,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:33,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:33,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:33,806 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:33,954 INFO L93 Difference]: Finished difference Result 138 states and 285 transitions. [2021-03-10 21:50:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:33,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:33,955 INFO L225 Difference]: With dead ends: 138 [2021-03-10 21:50:33,955 INFO L226 Difference]: Without dead ends: 138 [2021-03-10 21:50:33,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-03-10 21:50:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2021-03-10 21:50:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-03-10 21:50:33,956 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 17 [2021-03-10 21:50:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:33,956 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-03-10 21:50:33,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-03-10 21:50:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:33,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:33,957 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:34,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:34,170 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:34,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1578222580, now seen corresponding path program 99 times [2021-03-10 21:50:34,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:34,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92376343] [2021-03-10 21:50:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:34,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92376343] [2021-03-10 21:50:34,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548042472] [2021-03-10 21:50:34,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:34,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:50:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:34,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:34,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:34,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:34,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881712224] [2021-03-10 21:50:34,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:34,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:34,509 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:34,906 INFO L93 Difference]: Finished difference Result 132 states and 269 transitions. [2021-03-10 21:50:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:34,907 INFO L225 Difference]: With dead ends: 132 [2021-03-10 21:50:34,907 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 21:50:34,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:50:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 21:50:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2021-03-10 21:50:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-03-10 21:50:34,909 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 17 [2021-03-10 21:50:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:34,909 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-03-10 21:50:34,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-03-10 21:50:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:34,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:34,909 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:35,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable614 [2021-03-10 21:50:35,110 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1290672345, now seen corresponding path program 100 times [2021-03-10 21:50:35,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:35,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214249345] [2021-03-10 21:50:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:35,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214249345] [2021-03-10 21:50:35,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545053033] [2021-03-10 21:50:35,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:35,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:35,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:35,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:35,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:35,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665339013] [2021-03-10 21:50:35,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:35,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:35,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:35,367 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:35,843 INFO L93 Difference]: Finished difference Result 156 states and 317 transitions. [2021-03-10 21:50:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:35,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:35,844 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:50:35,844 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:50:35,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:50:35,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-03-10 21:50:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-03-10 21:50:35,846 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 17 [2021-03-10 21:50:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:35,846 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-03-10 21:50:35,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-03-10 21:50:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:35,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:35,846 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:36,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-03-10 21:50:36,059 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:36,059 INFO L82 PathProgramCache]: Analyzing trace with hash -988682065, now seen corresponding path program 101 times [2021-03-10 21:50:36,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:36,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270456553] [2021-03-10 21:50:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:36,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270456553] [2021-03-10 21:50:36,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725392325] [2021-03-10 21:50:36,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:36,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:36,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:36,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:36,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568325721] [2021-03-10 21:50:36,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:36,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:36,311 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:36,714 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-03-10 21:50:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:36,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:36,714 INFO L225 Difference]: With dead ends: 144 [2021-03-10 21:50:36,714 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 21:50:36,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 21:50:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-03-10 21:50:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.121739130434783) internal successors, (244), 115 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 244 transitions. [2021-03-10 21:50:36,716 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 244 transitions. Word has length 17 [2021-03-10 21:50:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:36,716 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 244 transitions. [2021-03-10 21:50:36,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 244 transitions. [2021-03-10 21:50:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:36,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:36,717 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:36,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-03-10 21:50:36,931 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:36,931 INFO L82 PathProgramCache]: Analyzing trace with hash -482335799, now seen corresponding path program 102 times [2021-03-10 21:50:36,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:36,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399066756] [2021-03-10 21:50:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:37,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399066756] [2021-03-10 21:50:37,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978524233] [2021-03-10 21:50:37,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:37,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:37,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:37,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:37,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:37,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:37,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655403922] [2021-03-10 21:50:37,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:37,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:37,161 INFO L87 Difference]: Start difference. First operand 116 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:37,387 INFO L93 Difference]: Finished difference Result 136 states and 281 transitions. [2021-03-10 21:50:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:50:37,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:37,388 INFO L225 Difference]: With dead ends: 136 [2021-03-10 21:50:37,388 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 21:50:37,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:50:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 21:50:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2021-03-10 21:50:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-03-10 21:50:37,389 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 17 [2021-03-10 21:50:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:37,389 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-03-10 21:50:37,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-03-10 21:50:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:37,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:37,390 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:37,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:37,605 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash 425996420, now seen corresponding path program 103 times [2021-03-10 21:50:37,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:37,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000718466] [2021-03-10 21:50:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:37,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000718466] [2021-03-10 21:50:37,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713409022] [2021-03-10 21:50:37,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:50:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:37,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:37,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:37,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970197732] [2021-03-10 21:50:37,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:37,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:37,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:37,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:37,858 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:38,092 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-03-10 21:50:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:50:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:38,092 INFO L225 Difference]: With dead ends: 126 [2021-03-10 21:50:38,093 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 21:50:38,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 21:50:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-03-10 21:50:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-03-10 21:50:38,103 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 17 [2021-03-10 21:50:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:38,103 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-03-10 21:50:38,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-03-10 21:50:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:38,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:38,103 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:38,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-03-10 21:50:38,314 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:38,315 INFO L82 PathProgramCache]: Analyzing trace with hash -644999044, now seen corresponding path program 104 times [2021-03-10 21:50:38,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:38,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394451490] [2021-03-10 21:50:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:38,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394451490] [2021-03-10 21:50:38,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599940073] [2021-03-10 21:50:38,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:38,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:38,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:38,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:38,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:38,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:38,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297365230] [2021-03-10 21:50:38,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:38,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:38,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:38,561 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:38,954 INFO L93 Difference]: Finished difference Result 132 states and 273 transitions. [2021-03-10 21:50:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:38,955 INFO L225 Difference]: With dead ends: 132 [2021-03-10 21:50:38,955 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 21:50:38,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:50:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 21:50:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-03-10 21:50:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-03-10 21:50:38,957 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 17 [2021-03-10 21:50:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:38,957 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-03-10 21:50:38,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-03-10 21:50:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:38,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:38,957 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:39,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-03-10 21:50:39,171 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1521883201, now seen corresponding path program 105 times [2021-03-10 21:50:39,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:39,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855478788] [2021-03-10 21:50:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:39,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855478788] [2021-03-10 21:50:39,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833782490] [2021-03-10 21:50:39,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:39,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:50:39,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:39,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:39,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:39,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919530525] [2021-03-10 21:50:39,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:39,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:39,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:39,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:39,477 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:39,786 INFO L93 Difference]: Finished difference Result 149 states and 291 transitions. [2021-03-10 21:50:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:39,787 INFO L225 Difference]: With dead ends: 149 [2021-03-10 21:50:39,787 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 21:50:39,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:50:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 21:50:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 117. [2021-03-10 21:50:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-03-10 21:50:39,788 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 17 [2021-03-10 21:50:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:39,788 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-03-10 21:50:39,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-03-10 21:50:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:39,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:39,789 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:40,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-03-10 21:50:40,004 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash -688109150, now seen corresponding path program 106 times [2021-03-10 21:50:40,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:40,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646063621] [2021-03-10 21:50:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:40,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646063621] [2021-03-10 21:50:40,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531671763] [2021-03-10 21:50:40,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:40,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:40,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:40,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:40,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:40,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:40,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402429976] [2021-03-10 21:50:40,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:40,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:40,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:40,249 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:40,686 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2021-03-10 21:50:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:40,687 INFO L225 Difference]: With dead ends: 136 [2021-03-10 21:50:40,687 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 21:50:40,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 21:50:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2021-03-10 21:50:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-03-10 21:50:40,688 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 17 [2021-03-10 21:50:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:40,688 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-03-10 21:50:40,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-03-10 21:50:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:40,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:40,689 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:40,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:40,889 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1279132801, now seen corresponding path program 107 times [2021-03-10 21:50:40,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:40,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471538431] [2021-03-10 21:50:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:40,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471538431] [2021-03-10 21:50:40,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264150105] [2021-03-10 21:50:40,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:40,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:40,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:40,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:40,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:41,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:41,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:41,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679510452] [2021-03-10 21:50:41,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:41,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:41,213 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:41,449 INFO L93 Difference]: Finished difference Result 123 states and 254 transitions. [2021-03-10 21:50:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:41,450 INFO L225 Difference]: With dead ends: 123 [2021-03-10 21:50:41,450 INFO L226 Difference]: Without dead ends: 123 [2021-03-10 21:50:41,450 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-03-10 21:50:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2021-03-10 21:50:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 108 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 227 transitions. [2021-03-10 21:50:41,451 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 227 transitions. Word has length 17 [2021-03-10 21:50:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:41,451 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 227 transitions. [2021-03-10 21:50:41,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 227 transitions. [2021-03-10 21:50:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:41,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:41,452 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:41,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-03-10 21:50:41,652 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133982, now seen corresponding path program 108 times [2021-03-10 21:50:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:41,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401473618] [2021-03-10 21:50:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:41,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401473618] [2021-03-10 21:50:41,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945986053] [2021-03-10 21:50:41,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:41,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:41,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:41,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:41,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:41,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666391179] [2021-03-10 21:50:41,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:41,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:41,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:41,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:41,913 INFO L87 Difference]: Start difference. First operand 109 states and 227 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:42,064 INFO L93 Difference]: Finished difference Result 123 states and 255 transitions. [2021-03-10 21:50:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:42,065 INFO L225 Difference]: With dead ends: 123 [2021-03-10 21:50:42,065 INFO L226 Difference]: Without dead ends: 123 [2021-03-10 21:50:42,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-03-10 21:50:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2021-03-10 21:50:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 108 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 227 transitions. [2021-03-10 21:50:42,066 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 227 transitions. Word has length 17 [2021-03-10 21:50:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:42,066 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 227 transitions. [2021-03-10 21:50:42,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 227 transitions. [2021-03-10 21:50:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:42,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:42,066 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:42,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:42,272 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:42,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1331398230, now seen corresponding path program 109 times [2021-03-10 21:50:42,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:42,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443197425] [2021-03-10 21:50:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:42,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443197425] [2021-03-10 21:50:42,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923139648] [2021-03-10 21:50:42,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:42,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:42,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:42,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:42,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976196347] [2021-03-10 21:50:42,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:42,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:42,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:42,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:42,555 INFO L87 Difference]: Start difference. First operand 109 states and 227 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:42,795 INFO L93 Difference]: Finished difference Result 132 states and 273 transitions. [2021-03-10 21:50:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:42,796 INFO L225 Difference]: With dead ends: 132 [2021-03-10 21:50:42,796 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 21:50:42,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 21:50:42,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2021-03-10 21:50:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 108 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 227 transitions. [2021-03-10 21:50:42,800 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 227 transitions. Word has length 17 [2021-03-10 21:50:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:42,800 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 227 transitions. [2021-03-10 21:50:42,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 227 transitions. [2021-03-10 21:50:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:42,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:42,800 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:43,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-03-10 21:50:43,008 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:43,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1043847995, now seen corresponding path program 110 times [2021-03-10 21:50:43,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:43,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935121166] [2021-03-10 21:50:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:43,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935121166] [2021-03-10 21:50:43,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740049484] [2021-03-10 21:50:43,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:43,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:43,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:43,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:43,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:43,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595091043] [2021-03-10 21:50:43,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:43,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:43,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:43,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:43,355 INFO L87 Difference]: Start difference. First operand 109 states and 227 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:43,506 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2021-03-10 21:50:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:50:43,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:43,507 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:50:43,507 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 21:50:43,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 21:50:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2021-03-10 21:50:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-03-10 21:50:43,508 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 17 [2021-03-10 21:50:43,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:43,508 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-03-10 21:50:43,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-03-10 21:50:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:43,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:43,509 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:43,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:43,723 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash -825051964, now seen corresponding path program 111 times [2021-03-10 21:50:43,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:43,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605911898] [2021-03-10 21:50:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:43,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605911898] [2021-03-10 21:50:43,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163365446] [2021-03-10 21:50:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:43,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:43,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:50:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:44,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:44,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:44,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998028622] [2021-03-10 21:50:44,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:44,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:44,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:44,059 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:44,244 INFO L93 Difference]: Finished difference Result 121 states and 244 transitions. [2021-03-10 21:50:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:44,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-03-10 21:50:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:44,245 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:50:44,245 INFO L226 Difference]: Without dead ends: 115 [2021-03-10 21:50:44,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-03-10 21:50:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2021-03-10 21:50:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-03-10 21:50:44,247 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 17 [2021-03-10 21:50:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:44,247 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-03-10 21:50:44,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-03-10 21:50:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-03-10 21:50:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:44,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:44,247 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:44,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-03-10 21:50:44,448 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash -537501729, now seen corresponding path program 112 times [2021-03-10 21:50:44,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:44,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366669081] [2021-03-10 21:50:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:44,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366669081] [2021-03-10 21:50:44,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139065723] [2021-03-10 21:50:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:44,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:44,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:44,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:44,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:44,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:44,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:44,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220791126] [2021-03-10 21:50:44,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:44,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:44,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:44,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:44,702 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:44,907 INFO L93 Difference]: Finished difference Result 152 states and 299 transitions. [2021-03-10 21:50:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:44,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:44,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:44,908 INFO L225 Difference]: With dead ends: 152 [2021-03-10 21:50:44,908 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 21:50:44,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 21:50:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 106. [2021-03-10 21:50:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-03-10 21:50:44,909 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 17 [2021-03-10 21:50:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:44,909 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-03-10 21:50:44,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-03-10 21:50:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:44,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:44,909 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:45,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:45,110 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash -235511449, now seen corresponding path program 113 times [2021-03-10 21:50:45,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:45,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794483388] [2021-03-10 21:50:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:45,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794483388] [2021-03-10 21:50:45,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208756850] [2021-03-10 21:50:45,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:45,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:45,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:45,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:45,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:45,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794379213] [2021-03-10 21:50:45,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:45,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:45,410 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:45,543 INFO L93 Difference]: Finished difference Result 120 states and 244 transitions. [2021-03-10 21:50:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:45,544 INFO L225 Difference]: With dead ends: 120 [2021-03-10 21:50:45,544 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 21:50:45,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 21:50:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-03-10 21:50:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-03-10 21:50:45,545 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-03-10 21:50:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:45,545 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-03-10 21:50:45,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-03-10 21:50:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:45,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:45,545 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:45,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-03-10 21:50:45,757 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash -860676804, now seen corresponding path program 114 times [2021-03-10 21:50:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:45,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21832996] [2021-03-10 21:50:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:45,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21832996] [2021-03-10 21:50:45,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129537487] [2021-03-10 21:50:45,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:50:45,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:45,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:46,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:46,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:46,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257681796] [2021-03-10 21:50:46,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:46,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:46,060 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:46,207 INFO L93 Difference]: Finished difference Result 119 states and 242 transitions. [2021-03-10 21:50:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:46,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:46,208 INFO L225 Difference]: With dead ends: 119 [2021-03-10 21:50:46,208 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 21:50:46,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 21:50:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-03-10 21:50:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 211 transitions. [2021-03-10 21:50:46,210 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 211 transitions. Word has length 17 [2021-03-10 21:50:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:46,210 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 211 transitions. [2021-03-10 21:50:46,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 211 transitions. [2021-03-10 21:50:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:46,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:46,210 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:46,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:46,410 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:46,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1306205441, now seen corresponding path program 115 times [2021-03-10 21:50:46,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:46,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433604377] [2021-03-10 21:50:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:46,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433604377] [2021-03-10 21:50:46,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310121342] [2021-03-10 21:50:46,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:46,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:46,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:46,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:46,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808993430] [2021-03-10 21:50:46,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:46,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:46,744 INFO L87 Difference]: Start difference. First operand 103 states and 211 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:46,915 INFO L93 Difference]: Finished difference Result 140 states and 269 transitions. [2021-03-10 21:50:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:46,916 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:50:46,916 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 21:50:46,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 21:50:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-03-10 21:50:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-03-10 21:50:46,917 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 17 [2021-03-10 21:50:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:46,917 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-03-10 21:50:46,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-03-10 21:50:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:46,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:46,918 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:47,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:47,118 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:47,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1063455041, now seen corresponding path program 116 times [2021-03-10 21:50:47,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:47,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200936780] [2021-03-10 21:50:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200936780] [2021-03-10 21:50:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680298102] [2021-03-10 21:50:47,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:47,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:47,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:47,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:50:47,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:47,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:47,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:47,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85833599] [2021-03-10 21:50:47,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:47,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:47,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:47,522 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:47,624 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-03-10 21:50:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:47,625 INFO L225 Difference]: With dead ends: 118 [2021-03-10 21:50:47,625 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:50:47,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:50:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2021-03-10 21:50:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-03-10 21:50:47,626 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-03-10 21:50:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:47,626 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-03-10 21:50:47,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-03-10 21:50:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:47,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:47,627 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:47,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-03-10 21:50:47,827 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1569801307, now seen corresponding path program 117 times [2021-03-10 21:50:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:47,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259384424] [2021-03-10 21:50:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:47,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259384424] [2021-03-10 21:50:47,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838835314] [2021-03-10 21:50:47,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:47,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:50:47,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:47,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:47,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:48,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:48,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:48,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855711705] [2021-03-10 21:50:48,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:48,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:48,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:48,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:48,097 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:48,343 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-03-10 21:50:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:48,344 INFO L225 Difference]: With dead ends: 137 [2021-03-10 21:50:48,344 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 21:50:48,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 21:50:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2021-03-10 21:50:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-03-10 21:50:48,345 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 17 [2021-03-10 21:50:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:48,345 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-03-10 21:50:48,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-03-10 21:50:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:48,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:48,345 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:48,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:48,560 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1031945729, now seen corresponding path program 118 times [2021-03-10 21:50:48,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:48,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075141302] [2021-03-10 21:50:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:48,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075141302] [2021-03-10 21:50:48,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052903190] [2021-03-10 21:50:48,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:48,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:48,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:48,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:48,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:48,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999004343] [2021-03-10 21:50:48,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:48,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:48,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:48,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:48,852 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:49,007 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-03-10 21:50:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:50:49,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:49,008 INFO L225 Difference]: With dead ends: 118 [2021-03-10 21:50:49,008 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:50:49,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:50:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2021-03-10 21:50:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-03-10 21:50:49,009 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-03-10 21:50:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:49,009 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-03-10 21:50:49,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-03-10 21:50:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:49,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:49,010 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:49,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-03-10 21:50:49,210 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:49,210 INFO L82 PathProgramCache]: Analyzing trace with hash 86666369, now seen corresponding path program 119 times [2021-03-10 21:50:49,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:49,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336778668] [2021-03-10 21:50:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:49,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336778668] [2021-03-10 21:50:49,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487367931] [2021-03-10 21:50:49,299 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:49,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:49,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:50:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:49,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:49,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:49,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615699312] [2021-03-10 21:50:49,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:49,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:49,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:49,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:49,504 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:49,973 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-03-10 21:50:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:49,974 INFO L225 Difference]: With dead ends: 137 [2021-03-10 21:50:49,974 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 21:50:49,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 21:50:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2021-03-10 21:50:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-03-10 21:50:49,976 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 17 [2021-03-10 21:50:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:49,976 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-03-10 21:50:49,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-03-10 21:50:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:49,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:49,976 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:50,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-03-10 21:50:50,177 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:50,177 INFO L82 PathProgramCache]: Analyzing trace with hash -451189209, now seen corresponding path program 120 times [2021-03-10 21:50:50,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:50,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677686581] [2021-03-10 21:50:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:50,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677686581] [2021-03-10 21:50:50,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557563631] [2021-03-10 21:50:50,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:50,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:50:50,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:50,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:50,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:50,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606145100] [2021-03-10 21:50:50,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:50,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:50,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:50,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:50,438 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:50,815 INFO L93 Difference]: Finished difference Result 129 states and 263 transitions. [2021-03-10 21:50:50,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:50,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:50,816 INFO L225 Difference]: With dead ends: 129 [2021-03-10 21:50:50,816 INFO L226 Difference]: Without dead ends: 129 [2021-03-10 21:50:50,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-03-10 21:50:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-03-10 21:50:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-03-10 21:50:50,817 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 17 [2021-03-10 21:50:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:50,818 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-03-10 21:50:50,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-03-10 21:50:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:50,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:50,818 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:51,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable701,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:51,018 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:51,019 INFO L82 PathProgramCache]: Analyzing trace with hash 55157057, now seen corresponding path program 121 times [2021-03-10 21:50:51,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:51,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921578961] [2021-03-10 21:50:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:51,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921578961] [2021-03-10 21:50:51,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427911173] [2021-03-10 21:50:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:50:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:51,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:51,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:51,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083563521] [2021-03-10 21:50:51,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:51,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:51,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:51,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:51,281 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:51,567 INFO L93 Difference]: Finished difference Result 126 states and 256 transitions. [2021-03-10 21:50:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:50:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:51,571 INFO L225 Difference]: With dead ends: 126 [2021-03-10 21:50:51,571 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 21:50:51,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 21:50:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2021-03-10 21:50:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-03-10 21:50:51,573 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-03-10 21:50:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:51,573 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-03-10 21:50:51,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-03-10 21:50:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:51,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:51,573 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:51,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-03-10 21:50:51,783 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:51,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:51,783 INFO L82 PathProgramCache]: Analyzing trace with hash -436365568, now seen corresponding path program 122 times [2021-03-10 21:50:51,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:51,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802921719] [2021-03-10 21:50:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:51,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802921719] [2021-03-10 21:50:51,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965021959] [2021-03-10 21:50:51,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:51,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:51,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:51,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:50:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:52,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:52,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:52,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387933531] [2021-03-10 21:50:52,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:52,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:52,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:52,132 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:52,365 INFO L93 Difference]: Finished difference Result 118 states and 239 transitions. [2021-03-10 21:50:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:52,365 INFO L225 Difference]: With dead ends: 118 [2021-03-10 21:50:52,365 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:50:52,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:50:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2021-03-10 21:50:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-03-10 21:50:52,367 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-03-10 21:50:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:52,367 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-03-10 21:50:52,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-03-10 21:50:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:52,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:52,367 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:52,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:52,575 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1730516677, now seen corresponding path program 123 times [2021-03-10 21:50:52,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:52,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794935431] [2021-03-10 21:50:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794935431] [2021-03-10 21:50:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831499788] [2021-03-10 21:50:52,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:52,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:52,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:52,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:52,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:52,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:52,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559860827] [2021-03-10 21:50:52,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:52,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:52,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:52,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:52,912 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:53,114 INFO L93 Difference]: Finished difference Result 138 states and 264 transitions. [2021-03-10 21:50:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:50:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:53,114 INFO L225 Difference]: With dead ends: 138 [2021-03-10 21:50:53,115 INFO L226 Difference]: Without dead ends: 134 [2021-03-10 21:50:53,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:53,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-03-10 21:50:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 107. [2021-03-10 21:50:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-03-10 21:50:53,116 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 17 [2021-03-10 21:50:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:53,116 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-03-10 21:50:53,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-03-10 21:50:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:53,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:53,117 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:53,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:53,317 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1487766277, now seen corresponding path program 124 times [2021-03-10 21:50:53,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:53,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422876348] [2021-03-10 21:50:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:53,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422876348] [2021-03-10 21:50:53,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347498321] [2021-03-10 21:50:53,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:53,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:53,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:53,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:53,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:53,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569157402] [2021-03-10 21:50:53,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:53,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:53,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:53,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:53,668 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:53,873 INFO L93 Difference]: Finished difference Result 112 states and 227 transitions. [2021-03-10 21:50:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:53,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:53,873 INFO L225 Difference]: With dead ends: 112 [2021-03-10 21:50:53,873 INFO L226 Difference]: Without dead ends: 112 [2021-03-10 21:50:53,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:50:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-03-10 21:50:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-03-10 21:50:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 203 transitions. [2021-03-10 21:50:53,875 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 203 transitions. Word has length 17 [2021-03-10 21:50:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:53,875 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 203 transitions. [2021-03-10 21:50:53,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 203 transitions. [2021-03-10 21:50:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:53,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:53,875 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:54,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-03-10 21:50:54,076 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:54,076 INFO L82 PathProgramCache]: Analyzing trace with hash 659521213, now seen corresponding path program 125 times [2021-03-10 21:50:54,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:54,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281248028] [2021-03-10 21:50:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:54,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281248028] [2021-03-10 21:50:54,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084504157] [2021-03-10 21:50:54,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:54,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:54,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:54,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:54,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:54,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:54,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:54,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225160677] [2021-03-10 21:50:54,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:54,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:54,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:54,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:54,351 INFO L87 Difference]: Start difference. First operand 100 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:54,563 INFO L93 Difference]: Finished difference Result 129 states and 253 transitions. [2021-03-10 21:50:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:54,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:54,564 INFO L225 Difference]: With dead ends: 129 [2021-03-10 21:50:54,564 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 21:50:54,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 21:50:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2021-03-10 21:50:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.058252427184466) internal successors, (212), 103 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 212 transitions. [2021-03-10 21:50:54,566 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 212 transitions. Word has length 17 [2021-03-10 21:50:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:54,566 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 212 transitions. [2021-03-10 21:50:54,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 212 transitions. [2021-03-10 21:50:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:54,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:54,566 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:54,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:54,771 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:54,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1994112543, now seen corresponding path program 126 times [2021-03-10 21:50:54,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:54,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311570585] [2021-03-10 21:50:54,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:54,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311570585] [2021-03-10 21:50:54,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591436360] [2021-03-10 21:50:54,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:54,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:54,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:54,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:50:54,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:55,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:55,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:55,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126407978] [2021-03-10 21:50:55,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:55,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:55,086 INFO L87 Difference]: Start difference. First operand 104 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:55,327 INFO L93 Difference]: Finished difference Result 135 states and 267 transitions. [2021-03-10 21:50:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:55,327 INFO L225 Difference]: With dead ends: 135 [2021-03-10 21:50:55,327 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 21:50:55,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 21:50:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 103. [2021-03-10 21:50:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 102 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 210 transitions. [2021-03-10 21:50:55,329 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 210 transitions. Word has length 17 [2021-03-10 21:50:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:55,329 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 210 transitions. [2021-03-10 21:50:55,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 210 transitions. [2021-03-10 21:50:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:55,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:55,329 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:55,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-03-10 21:50:55,530 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:55,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:55,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1456256965, now seen corresponding path program 127 times [2021-03-10 21:50:55,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:55,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131799022] [2021-03-10 21:50:55,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:55,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131799022] [2021-03-10 21:50:55,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891118508] [2021-03-10 21:50:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:55,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:55,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:50:55,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109423346] [2021-03-10 21:50:55,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:55,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:55,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:55,799 INFO L87 Difference]: Start difference. First operand 103 states and 210 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:55,974 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2021-03-10 21:50:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:55,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:55,974 INFO L225 Difference]: With dead ends: 119 [2021-03-10 21:50:55,975 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 21:50:55,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 21:50:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-03-10 21:50:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 96 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 196 transitions. [2021-03-10 21:50:55,976 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 196 transitions. Word has length 17 [2021-03-10 21:50:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:55,976 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 196 transitions. [2021-03-10 21:50:55,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 196 transitions. [2021-03-10 21:50:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:55,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:55,976 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:56,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2021-03-10 21:50:56,191 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash -823613725, now seen corresponding path program 128 times [2021-03-10 21:50:56,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:56,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657938489] [2021-03-10 21:50:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:56,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657938489] [2021-03-10 21:50:56,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021203195] [2021-03-10 21:50:56,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:56,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:56,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:56,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:56,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:56,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:56,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558940638] [2021-03-10 21:50:56,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:56,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:56,454 INFO L87 Difference]: Start difference. First operand 97 states and 196 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:56,804 INFO L93 Difference]: Finished difference Result 129 states and 253 transitions. [2021-03-10 21:50:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:50:56,805 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:56,805 INFO L225 Difference]: With dead ends: 129 [2021-03-10 21:50:56,805 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 21:50:56,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 21:50:56,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2021-03-10 21:50:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-03-10 21:50:56,807 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 17 [2021-03-10 21:50:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:56,807 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-03-10 21:50:56,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-03-10 21:50:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:56,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:56,807 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:57,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-03-10 21:50:57,007 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash 510977605, now seen corresponding path program 129 times [2021-03-10 21:50:57,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:57,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272611131] [2021-03-10 21:50:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:57,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272611131] [2021-03-10 21:50:57,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929271262] [2021-03-10 21:50:57,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:50:57,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:50:57,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:57,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:50:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:57,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:57,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:50:57,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529048713] [2021-03-10 21:50:57,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:50:57,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:57,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:50:57,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:57,320 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:57,737 INFO L93 Difference]: Finished difference Result 135 states and 267 transitions. [2021-03-10 21:50:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:50:57,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:57,738 INFO L225 Difference]: With dead ends: 135 [2021-03-10 21:50:57,738 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 21:50:57,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:50:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 21:50:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-03-10 21:50:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-03-10 21:50:57,740 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 17 [2021-03-10 21:50:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:57,740 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-03-10 21:50:57,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-03-10 21:50:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:57,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:57,740 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:57,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:57,941 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash -26877973, now seen corresponding path program 130 times [2021-03-10 21:50:57,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:57,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640975230] [2021-03-10 21:50:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640975230] [2021-03-10 21:50:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330086904] [2021-03-10 21:50:58,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:58,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:58,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:58,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:58,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:58,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051332256] [2021-03-10 21:50:58,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:58,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:58,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:58,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:58,202 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:58,438 INFO L93 Difference]: Finished difference Result 126 states and 255 transitions. [2021-03-10 21:50:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:58,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:58,439 INFO L225 Difference]: With dead ends: 126 [2021-03-10 21:50:58,439 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 21:50:58,439 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 21:50:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2021-03-10 21:50:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 211 transitions. [2021-03-10 21:50:58,441 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 211 transitions. Word has length 17 [2021-03-10 21:50:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:58,441 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 211 transitions. [2021-03-10 21:50:58,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 211 transitions. [2021-03-10 21:50:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:58,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:58,441 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:58,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:58,642 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:58,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:58,642 INFO L82 PathProgramCache]: Analyzing trace with hash 479468293, now seen corresponding path program 131 times [2021-03-10 21:50:58,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:58,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942368854] [2021-03-10 21:50:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:58,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942368854] [2021-03-10 21:50:58,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235783241] [2021-03-10 21:50:58,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:58,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:50:58,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:58,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:50:58,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:58,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:58,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:58,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365796199] [2021-03-10 21:50:58,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:58,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:58,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:58,889 INFO L87 Difference]: Start difference. First operand 103 states and 211 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:59,114 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-03-10 21:50:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:50:59,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:59,115 INFO L225 Difference]: With dead ends: 118 [2021-03-10 21:50:59,115 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:50:59,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:50:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:50:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2021-03-10 21:50:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 96 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 196 transitions. [2021-03-10 21:50:59,116 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 196 transitions. Word has length 17 [2021-03-10 21:50:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:59,116 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 196 transitions. [2021-03-10 21:50:59,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 196 transitions. [2021-03-10 21:50:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:59,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:59,117 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:59,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-03-10 21:50:59,317 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1355949057, now seen corresponding path program 132 times [2021-03-10 21:50:59,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:59,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772331418] [2021-03-10 21:50:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:59,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772331418] [2021-03-10 21:50:59,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298501712] [2021-03-10 21:50:59,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:59,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:50:59,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:59,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:50:59,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:59,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:59,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:59,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435180886] [2021-03-10 21:50:59,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:59,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:59,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:59,578 INFO L87 Difference]: Start difference. First operand 97 states and 196 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:00,525 INFO L93 Difference]: Finished difference Result 189 states and 350 transitions. [2021-03-10 21:51:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:51:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:00,525 INFO L225 Difference]: With dead ends: 189 [2021-03-10 21:51:00,525 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:51:00,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 927.2ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:51:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:51:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 99. [2021-03-10 21:51:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 98 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 204 transitions. [2021-03-10 21:51:00,527 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 204 transitions. Word has length 17 [2021-03-10 21:51:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:00,527 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 204 transitions. [2021-03-10 21:51:00,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 204 transitions. [2021-03-10 21:51:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:00,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:00,527 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:00,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-03-10 21:51:00,733 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 818093479, now seen corresponding path program 133 times [2021-03-10 21:51:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:00,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691081841] [2021-03-10 21:51:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:00,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691081841] [2021-03-10 21:51:00,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691556575] [2021-03-10 21:51:00,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:00,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:51:00,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:01,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:01,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:51:01,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425089528] [2021-03-10 21:51:01,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:51:01,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:51:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:51:01,000 INFO L87 Difference]: Start difference. First operand 99 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:01,458 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-03-10 21:51:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:51:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:01,459 INFO L225 Difference]: With dead ends: 150 [2021-03-10 21:51:01,459 INFO L226 Difference]: Without dead ends: 150 [2021-03-10 21:51:01,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:51:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-03-10 21:51:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2021-03-10 21:51:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-03-10 21:51:01,460 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-03-10 21:51:01,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:01,460 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-03-10 21:51:01,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-03-10 21:51:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:01,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:01,461 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:01,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-03-10 21:51:01,661 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1324439745, now seen corresponding path program 134 times [2021-03-10 21:51:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:01,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675962128] [2021-03-10 21:51:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:01,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675962128] [2021-03-10 21:51:01,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716518224] [2021-03-10 21:51:01,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:01,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:01,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:51:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:01,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:01,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:51:01,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935008871] [2021-03-10 21:51:01,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:51:01,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:01,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:51:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:51:01,911 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:02,346 INFO L93 Difference]: Finished difference Result 157 states and 313 transitions. [2021-03-10 21:51:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:51:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:02,347 INFO L225 Difference]: With dead ends: 157 [2021-03-10 21:51:02,347 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 21:51:02,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:51:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 21:51:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 97. [2021-03-10 21:51:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 96 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 200 transitions. [2021-03-10 21:51:02,349 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 200 transitions. Word has length 17 [2021-03-10 21:51:02,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:02,349 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 200 transitions. [2021-03-10 21:51:02,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 200 transitions. [2021-03-10 21:51:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:02,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:02,349 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:02,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable755,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:02,549 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:02,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1767338885, now seen corresponding path program 135 times [2021-03-10 21:51:02,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:02,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905699811] [2021-03-10 21:51:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:02,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905699811] [2021-03-10 21:51:02,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018074523] [2021-03-10 21:51:02,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:02,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:02,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:02,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:02,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:02,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:02,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:51:02,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010923244] [2021-03-10 21:51:02,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:51:02,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:51:02,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:51:02,735 INFO L87 Difference]: Start difference. First operand 97 states and 200 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:02,844 INFO L93 Difference]: Finished difference Result 142 states and 280 transitions. [2021-03-10 21:51:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:51:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:02,845 INFO L225 Difference]: With dead ends: 142 [2021-03-10 21:51:02,845 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 21:51:02,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:51:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 21:51:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2021-03-10 21:51:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.043010752688172) internal successors, (190), 93 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 190 transitions. [2021-03-10 21:51:02,846 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 190 transitions. Word has length 17 [2021-03-10 21:51:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:02,846 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 190 transitions. [2021-03-10 21:51:02,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 190 transitions. [2021-03-10 21:51:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:02,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:02,846 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:03,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-03-10 21:51:03,047 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash 316048736, now seen corresponding path program 136 times [2021-03-10 21:51:03,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:03,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379551379] [2021-03-10 21:51:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:03,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379551379] [2021-03-10 21:51:03,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295331093] [2021-03-10 21:51:03,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:03,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:03,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:03,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:03,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262185820] [2021-03-10 21:51:03,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:03,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:03,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:03,647 INFO L87 Difference]: Start difference. First operand 94 states and 190 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:04,898 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 21:51:05,146 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-03-10 21:51:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:05,163 INFO L93 Difference]: Finished difference Result 206 states and 419 transitions. [2021-03-10 21:51:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:51:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:05,164 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:51:05,164 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 21:51:05,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1745.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:51:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 21:51:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 98. [2021-03-10 21:51:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 200 transitions. [2021-03-10 21:51:05,166 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 200 transitions. Word has length 18 [2021-03-10 21:51:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:05,166 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 200 transitions. [2021-03-10 21:51:05,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 200 transitions. [2021-03-10 21:51:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:05,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:05,166 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:05,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-03-10 21:51:05,366 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:05,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2075337876, now seen corresponding path program 137 times [2021-03-10 21:51:05,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:05,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615462934] [2021-03-10 21:51:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:05,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615462934] [2021-03-10 21:51:05,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138873488] [2021-03-10 21:51:05,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:05,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:51:05,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:05,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:06,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:06,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:06,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404237978] [2021-03-10 21:51:06,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:06,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:06,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:06,033 INFO L87 Difference]: Start difference. First operand 98 states and 200 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:06,671 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-03-10 21:51:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:51:06,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:06,672 INFO L225 Difference]: With dead ends: 124 [2021-03-10 21:51:06,672 INFO L226 Difference]: Without dead ends: 109 [2021-03-10 21:51:06,672 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 987.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:51:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-10 21:51:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-03-10 21:51:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 99 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 204 transitions. [2021-03-10 21:51:06,674 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 204 transitions. Word has length 18 [2021-03-10 21:51:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:06,674 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 204 transitions. [2021-03-10 21:51:06,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 204 transitions. [2021-03-10 21:51:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:06,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:06,674 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:06,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-03-10 21:51:06,889 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:06,890 INFO L82 PathProgramCache]: Analyzing trace with hash 422384502, now seen corresponding path program 138 times [2021-03-10 21:51:06,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:06,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318563761] [2021-03-10 21:51:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:07,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318563761] [2021-03-10 21:51:07,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048021500] [2021-03-10 21:51:07,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:07,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:51:07,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:07,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:07,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:07,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:07,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:07,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911240734] [2021-03-10 21:51:07,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:07,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:07,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:07,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:07,725 INFO L87 Difference]: Start difference. First operand 100 states and 204 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:08,266 INFO L93 Difference]: Finished difference Result 123 states and 239 transitions. [2021-03-10 21:51:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:51:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:08,267 INFO L225 Difference]: With dead ends: 123 [2021-03-10 21:51:08,267 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 21:51:08,267 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1053.0ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:51:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 21:51:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-03-10 21:51:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.06) internal successors, (206), 100 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 206 transitions. [2021-03-10 21:51:08,269 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 206 transitions. Word has length 18 [2021-03-10 21:51:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:08,269 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 206 transitions. [2021-03-10 21:51:08,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 206 transitions. [2021-03-10 21:51:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:08,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:08,269 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:08,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-03-10 21:51:08,483 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:08,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:08,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1154957228, now seen corresponding path program 139 times [2021-03-10 21:51:08,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:08,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666389049] [2021-03-10 21:51:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:08,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666389049] [2021-03-10 21:51:08,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108957833] [2021-03-10 21:51:08,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:51:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:08,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:09,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:09,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:09,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912832043] [2021-03-10 21:51:09,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:09,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:09,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:09,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:09,258 INFO L87 Difference]: Start difference. First operand 101 states and 206 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:10,048 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-03-10 21:51:10,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:10,731 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2021-03-10 21:51:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:51:10,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:10,731 INFO L225 Difference]: With dead ends: 163 [2021-03-10 21:51:10,731 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 21:51:10,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1839.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:51:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 21:51:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-03-10 21:51:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 221 transitions. [2021-03-10 21:51:10,733 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 221 transitions. Word has length 18 [2021-03-10 21:51:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:10,733 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 221 transitions. [2021-03-10 21:51:10,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2021-03-10 21:51:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:10,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:10,733 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:10,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-03-10 21:51:10,934 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1060750436, now seen corresponding path program 140 times [2021-03-10 21:51:10,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:10,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395387077] [2021-03-10 21:51:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:11,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395387077] [2021-03-10 21:51:11,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245516733] [2021-03-10 21:51:11,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:11,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:11,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:11,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:11,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:11,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:11,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:11,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901371749] [2021-03-10 21:51:11,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:11,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:11,624 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:12,224 INFO L93 Difference]: Finished difference Result 132 states and 262 transitions. [2021-03-10 21:51:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:51:12,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:12,225 INFO L225 Difference]: With dead ends: 132 [2021-03-10 21:51:12,225 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 21:51:12,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 971.3ms TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:51:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 21:51:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2021-03-10 21:51:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-03-10 21:51:12,226 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 18 [2021-03-10 21:51:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:12,226 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-03-10 21:51:12,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-03-10 21:51:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:12,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:12,227 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:12,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:12,435 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1656875130, now seen corresponding path program 141 times [2021-03-10 21:51:12,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:12,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386469590] [2021-03-10 21:51:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:12,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386469590] [2021-03-10 21:51:12,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651903232] [2021-03-10 21:51:12,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:12,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:12,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:51:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:13,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:13,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:13,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660275508] [2021-03-10 21:51:13,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:13,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:13,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:13,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:13,190 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:13,812 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-10 21:51:13,966 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 21:51:14,125 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-10 21:51:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:14,934 INFO L93 Difference]: Finished difference Result 177 states and 347 transitions. [2021-03-10 21:51:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:51:14,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:14,935 INFO L225 Difference]: With dead ends: 177 [2021-03-10 21:51:14,935 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 21:51:14,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2051.8ms TimeCoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:51:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 21:51:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 112. [2021-03-10 21:51:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-03-10 21:51:14,937 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 18 [2021-03-10 21:51:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:14,937 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-03-10 21:51:14,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-03-10 21:51:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:14,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:14,937 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:15,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:15,138 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:15,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2131745900, now seen corresponding path program 142 times [2021-03-10 21:51:15,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:15,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817794667] [2021-03-10 21:51:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:15,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817794667] [2021-03-10 21:51:15,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390514854] [2021-03-10 21:51:15,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:15,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:15,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:15,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:15,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:15,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063244858] [2021-03-10 21:51:15,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:15,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:15,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:15,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:15,797 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:16,911 INFO L93 Difference]: Finished difference Result 169 states and 335 transitions. [2021-03-10 21:51:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:51:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:16,912 INFO L225 Difference]: With dead ends: 169 [2021-03-10 21:51:16,912 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 21:51:16,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1363.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:51:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 21:51:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2021-03-10 21:51:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1228070175438596) internal successors, (242), 114 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 242 transitions. [2021-03-10 21:51:16,914 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 242 transitions. Word has length 18 [2021-03-10 21:51:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:16,914 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 242 transitions. [2021-03-10 21:51:16,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 242 transitions. [2021-03-10 21:51:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:16,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:16,914 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:17,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:17,114 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1335010148, now seen corresponding path program 143 times [2021-03-10 21:51:17,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:17,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273347045] [2021-03-10 21:51:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:17,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273347045] [2021-03-10 21:51:17,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810937369] [2021-03-10 21:51:17,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:17,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:51:17,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:17,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:17,675 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:51:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:17,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:17,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:17,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276734574] [2021-03-10 21:51:17,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:17,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:17,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:17,830 INFO L87 Difference]: Start difference. First operand 115 states and 242 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:19,219 INFO L93 Difference]: Finished difference Result 188 states and 360 transitions. [2021-03-10 21:51:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:51:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:19,220 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:51:19,220 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:51:19,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1635.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:51:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:51:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-03-10 21:51:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-03-10 21:51:19,222 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 18 [2021-03-10 21:51:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:19,222 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-03-10 21:51:19,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-03-10 21:51:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:19,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:19,222 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:19,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-03-10 21:51:19,423 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1158851330, now seen corresponding path program 144 times [2021-03-10 21:51:19,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:19,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891891425] [2021-03-10 21:51:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:19,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891891425] [2021-03-10 21:51:19,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124708307] [2021-03-10 21:51:19,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:19,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:51:19,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:51:19,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:20,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:20,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:20,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940357942] [2021-03-10 21:51:20,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:20,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:20,074 INFO L87 Difference]: Start difference. First operand 118 states and 250 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:20,722 INFO L93 Difference]: Finished difference Result 140 states and 283 transitions. [2021-03-10 21:51:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:51:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:20,723 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:51:20,723 INFO L226 Difference]: Without dead ends: 125 [2021-03-10 21:51:20,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 978.3ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:51:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-03-10 21:51:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2021-03-10 21:51:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-03-10 21:51:20,724 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 18 [2021-03-10 21:51:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:20,724 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-03-10 21:51:20,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-03-10 21:51:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:20,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:20,728 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:20,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-03-10 21:51:20,939 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:20,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1483162592, now seen corresponding path program 145 times [2021-03-10 21:51:20,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:20,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384420538] [2021-03-10 21:51:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:21,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384420538] [2021-03-10 21:51:21,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870560302] [2021-03-10 21:51:21,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:21,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:21,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:21,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:21,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41905999] [2021-03-10 21:51:21,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:21,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:21,688 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:22,472 INFO L93 Difference]: Finished difference Result 150 states and 299 transitions. [2021-03-10 21:51:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:51:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:22,473 INFO L225 Difference]: With dead ends: 150 [2021-03-10 21:51:22,473 INFO L226 Difference]: Without dead ends: 143 [2021-03-10 21:51:22,473 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1194.5ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:51:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-03-10 21:51:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2021-03-10 21:51:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.142857142857143) internal successors, (255), 119 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 255 transitions. [2021-03-10 21:51:22,475 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 255 transitions. Word has length 18 [2021-03-10 21:51:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:22,475 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 255 transitions. [2021-03-10 21:51:22,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 255 transitions. [2021-03-10 21:51:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:22,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:22,475 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:22,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-03-10 21:51:22,675 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash -94179138, now seen corresponding path program 146 times [2021-03-10 21:51:22,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:22,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487185053] [2021-03-10 21:51:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:22,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487185053] [2021-03-10 21:51:22,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883919868] [2021-03-10 21:51:22,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:22,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:22,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:22,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:51:22,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:23,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:23,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:23,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348241584] [2021-03-10 21:51:23,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:23,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:23,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:23,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:23,411 INFO L87 Difference]: Start difference. First operand 120 states and 255 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:24,507 INFO L93 Difference]: Finished difference Result 177 states and 342 transitions. [2021-03-10 21:51:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:51:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:24,507 INFO L225 Difference]: With dead ends: 177 [2021-03-10 21:51:24,508 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 21:51:24,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1419.1ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:51:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 21:51:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2021-03-10 21:51:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-03-10 21:51:24,509 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 18 [2021-03-10 21:51:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:24,509 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-03-10 21:51:24,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-03-10 21:51:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:24,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:24,510 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:24,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:24,710 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash -863772573, now seen corresponding path program 147 times [2021-03-10 21:51:24,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:24,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697434496] [2021-03-10 21:51:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:51:24,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697434496] [2021-03-10 21:51:24,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563611557] [2021-03-10 21:51:24,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:24,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:51:24,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:24,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:25,137 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 21:51:25,313 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-03-10 21:51:25,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,323 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 21:51:25,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,339 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,347 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 21:51:25,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,357 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,365 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 21:51:25,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,374 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,375 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,382 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-03-10 21:51:25,383 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 21:51:25,390 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,400 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 21:51:25,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-03-10 21:51:25,402 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:51:25,406 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,412 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,413 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,420 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-03-10 21:51:25,422 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,430 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,437 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:25,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,443 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:51:25,446 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,455 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,458 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:51:25,459 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,466 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,467 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,475 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,476 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,484 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-03-10 21:51:25,485 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,495 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 21:51:25,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-03-10 21:51:25,497 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,505 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,506 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:51:25,510 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 21:51:25,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-03-10 21:51:25,518 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:25,584 INFO L628 ElimStorePlain]: treesize reduction 21, result has 71.6 percent of original size [2021-03-10 21:51:25,584 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-03-10 21:51:25,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:51:25,586 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 3 variables, input treesize:1304, output treesize:50 [2021-03-10 21:51:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:25,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:25,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-03-10 21:51:25,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812469639] [2021-03-10 21:51:25,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:25,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:25,675 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:26,478 INFO L93 Difference]: Finished difference Result 177 states and 349 transitions. [2021-03-10 21:51:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:51:26,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:26,479 INFO L225 Difference]: With dead ends: 177 [2021-03-10 21:51:26,479 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 21:51:26,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1051.3ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:51:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 21:51:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 116. [2021-03-10 21:51:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.130434782608696) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 245 transitions. [2021-03-10 21:51:26,481 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 245 transitions. Word has length 18 [2021-03-10 21:51:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:26,481 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 245 transitions. [2021-03-10 21:51:26,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 245 transitions. [2021-03-10 21:51:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:26,482 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:26,482 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:26,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable892,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:26,691 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1267484832, now seen corresponding path program 148 times [2021-03-10 21:51:26,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:26,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992434331] [2021-03-10 21:51:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:26,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992434331] [2021-03-10 21:51:26,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687456533] [2021-03-10 21:51:26,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:26,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:26,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:26,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:26,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:27,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:27,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:27,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204364229] [2021-03-10 21:51:27,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:27,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:27,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:27,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:27,366 INFO L87 Difference]: Start difference. First operand 116 states and 245 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:28,013 INFO L93 Difference]: Finished difference Result 155 states and 314 transitions. [2021-03-10 21:51:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:51:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:28,014 INFO L225 Difference]: With dead ends: 155 [2021-03-10 21:51:28,014 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 21:51:28,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 948.3ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:51:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 21:51:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-03-10 21:51:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-03-10 21:51:28,016 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 18 [2021-03-10 21:51:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:28,016 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-03-10 21:51:28,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-03-10 21:51:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:28,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:28,016 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:28,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:28,217 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash -309856898, now seen corresponding path program 149 times [2021-03-10 21:51:28,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:28,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821127416] [2021-03-10 21:51:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:28,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821127416] [2021-03-10 21:51:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940295216] [2021-03-10 21:51:28,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:28,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:51:28,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:28,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:28,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:28,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:28,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:28,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152915250] [2021-03-10 21:51:28,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:28,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:28,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:28,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:28,929 INFO L87 Difference]: Start difference. First operand 118 states and 250 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:29,518 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-03-10 21:51:29,710 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-03-10 21:51:29,835 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 21:51:29,971 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-03-10 21:51:30,366 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-03-10 21:51:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:30,405 INFO L93 Difference]: Finished difference Result 186 states and 363 transitions. [2021-03-10 21:51:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:51:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:30,406 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:51:30,406 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 21:51:30,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1733.1ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:51:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 21:51:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2021-03-10 21:51:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-03-10 21:51:30,408 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 18 [2021-03-10 21:51:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:30,408 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-03-10 21:51:30,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-03-10 21:51:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:30,409 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:30,409 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:30,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-03-10 21:51:30,619 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash 196489368, now seen corresponding path program 150 times [2021-03-10 21:51:30,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:30,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858152967] [2021-03-10 21:51:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:30,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858152967] [2021-03-10 21:51:30,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131273917] [2021-03-10 21:51:30,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:30,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:51:30,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:31,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:31,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:31,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549757118] [2021-03-10 21:51:31,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:31,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:31,365 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:32,456 INFO L93 Difference]: Finished difference Result 192 states and 376 transitions. [2021-03-10 21:51:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:51:32,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:32,457 INFO L225 Difference]: With dead ends: 192 [2021-03-10 21:51:32,457 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 21:51:32,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1419.3ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:51:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 21:51:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 122. [2021-03-10 21:51:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-03-10 21:51:32,459 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-03-10 21:51:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:32,459 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-03-10 21:51:32,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-03-10 21:51:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:32,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:32,459 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:32,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable942 [2021-03-10 21:51:32,660 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:32,660 INFO L82 PathProgramCache]: Analyzing trace with hash 993225120, now seen corresponding path program 151 times [2021-03-10 21:51:32,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:32,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343329719] [2021-03-10 21:51:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:32,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343329719] [2021-03-10 21:51:32,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110877438] [2021-03-10 21:51:32,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:32,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:32,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:33,222 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:51:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:33,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:33,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:33,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443299] [2021-03-10 21:51:33,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:33,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:33,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:33,380 INFO L87 Difference]: Start difference. First operand 122 states and 261 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:34,067 INFO L93 Difference]: Finished difference Result 188 states and 377 transitions. [2021-03-10 21:51:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:51:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:34,068 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:51:34,068 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 21:51:34,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 979.5ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:51:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 21:51:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 123. [2021-03-10 21:51:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1639344262295084) internal successors, (264), 122 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 264 transitions. [2021-03-10 21:51:34,070 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 264 transitions. Word has length 18 [2021-03-10 21:51:34,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:34,070 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 264 transitions. [2021-03-10 21:51:34,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 264 transitions. [2021-03-10 21:51:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:34,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:34,071 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:34,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-03-10 21:51:34,271 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1286645570, now seen corresponding path program 152 times [2021-03-10 21:51:34,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:34,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080340315] [2021-03-10 21:51:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:34,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080340315] [2021-03-10 21:51:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532322259] [2021-03-10 21:51:34,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:34,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:34,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:34,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:51:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:34,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:34,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:34,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138210363] [2021-03-10 21:51:34,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:34,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:34,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:34,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:34,937 INFO L87 Difference]: Start difference. First operand 123 states and 264 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:35,378 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-03-10 21:51:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:36,073 INFO L93 Difference]: Finished difference Result 192 states and 382 transitions. [2021-03-10 21:51:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:51:36,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:36,074 INFO L225 Difference]: With dead ends: 192 [2021-03-10 21:51:36,074 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 21:51:36,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1427.4ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:51:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 21:51:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2021-03-10 21:51:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-03-10 21:51:36,076 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 18 [2021-03-10 21:51:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:36,076 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-03-10 21:51:36,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-03-10 21:51:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:36,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:36,076 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:36,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-03-10 21:51:36,277 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:36,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:36,277 INFO L82 PathProgramCache]: Analyzing trace with hash -603138887, now seen corresponding path program 153 times [2021-03-10 21:51:36,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:36,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312893721] [2021-03-10 21:51:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:51:36,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312893721] [2021-03-10 21:51:36,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287563809] [2021-03-10 21:51:36,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:36,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:51:36,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:36,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:51:36,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:51:36,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:36,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:51:36,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912912905] [2021-03-10 21:51:36,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:51:36,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:36,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:51:36,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:51:36,618 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:36,801 INFO L93 Difference]: Finished difference Result 131 states and 278 transitions. [2021-03-10 21:51:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:51:36,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:36,802 INFO L225 Difference]: With dead ends: 131 [2021-03-10 21:51:36,802 INFO L226 Difference]: Without dead ends: 131 [2021-03-10 21:51:36,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:51:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-03-10 21:51:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2021-03-10 21:51:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-03-10 21:51:36,803 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 18 [2021-03-10 21:51:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:36,803 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-03-10 21:51:36,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-03-10 21:51:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:36,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:36,803 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:37,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:37,004 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -489909818, now seen corresponding path program 154 times [2021-03-10 21:51:37,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:37,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174362776] [2021-03-10 21:51:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:37,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174362776] [2021-03-10 21:51:37,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084685988] [2021-03-10 21:51:37,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:51:37,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:37,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:37,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:37,673 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:51:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:37,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:37,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:37,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688151620] [2021-03-10 21:51:37,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:37,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:37,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:37,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:37,831 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:38,015 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 21:51:38,152 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 21:51:38,471 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 21:51:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:38,715 INFO L93 Difference]: Finished difference Result 182 states and 366 transitions. [2021-03-10 21:51:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:51:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:38,716 INFO L225 Difference]: With dead ends: 182 [2021-03-10 21:51:38,716 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 21:51:38,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1300.6ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:51:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 21:51:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 115. [2021-03-10 21:51:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 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) [2021-03-10 21:51:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-03-10 21:51:38,718 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 18 [2021-03-10 21:51:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:38,718 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-03-10 21:51:38,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-03-10 21:51:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:38,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:38,718 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:38,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable985 [2021-03-10 21:51:38,919 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash 16436448, now seen corresponding path program 155 times [2021-03-10 21:51:38,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:38,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732019223] [2021-03-10 21:51:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:39,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732019223] [2021-03-10 21:51:39,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724533131] [2021-03-10 21:51:39,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:39,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:51:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:39,408 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:51:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:39,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:39,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:39,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235463721] [2021-03-10 21:51:39,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:39,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:39,643 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:40,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:40,500 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-03-10 21:51:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:51:40,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:40,501 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:51:40,501 INFO L226 Difference]: Without dead ends: 184 [2021-03-10 21:51:40,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1171.3ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:51:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-10 21:51:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2021-03-10 21:51:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2184873949579833) internal successors, (264), 119 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 264 transitions. [2021-03-10 21:51:40,502 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 264 transitions. Word has length 18 [2021-03-10 21:51:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:40,503 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 264 transitions. [2021-03-10 21:51:40,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 264 transitions. [2021-03-10 21:51:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:40,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:40,503 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:40,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable995,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:40,703 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1660498388, now seen corresponding path program 156 times [2021-03-10 21:51:40,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:40,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835711054] [2021-03-10 21:51:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:41,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835711054] [2021-03-10 21:51:41,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304576975] [2021-03-10 21:51:41,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:41,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:51:41,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:41,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:41,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:41,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354308566] [2021-03-10 21:51:41,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:41,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:41,520 INFO L87 Difference]: Start difference. First operand 120 states and 264 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:41,808 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-10 21:51:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:42,132 INFO L93 Difference]: Finished difference Result 139 states and 292 transitions. [2021-03-10 21:51:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:51:42,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:42,133 INFO L225 Difference]: With dead ends: 139 [2021-03-10 21:51:42,133 INFO L226 Difference]: Without dead ends: 124 [2021-03-10 21:51:42,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1124.7ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:51:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-10 21:51:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2021-03-10 21:51:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.216666666666667) internal successors, (266), 120 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 266 transitions. [2021-03-10 21:51:42,135 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 266 transitions. Word has length 18 [2021-03-10 21:51:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:42,135 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 266 transitions. [2021-03-10 21:51:42,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 266 transitions. [2021-03-10 21:51:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:42,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:42,135 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:42,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1007 [2021-03-10 21:51:42,343 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:42,343 INFO L82 PathProgramCache]: Analyzing trace with hash 7545014, now seen corresponding path program 157 times [2021-03-10 21:51:42,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:42,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630886740] [2021-03-10 21:51:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:42,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630886740] [2021-03-10 21:51:42,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084103600] [2021-03-10 21:51:42,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:51:42,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:43,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:43,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:43,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740181178] [2021-03-10 21:51:43,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:43,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:43,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:43,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:43,200 INFO L87 Difference]: Start difference. First operand 121 states and 266 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:43,479 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-10 21:51:43,767 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 21:51:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:44,123 INFO L93 Difference]: Finished difference Result 140 states and 295 transitions. [2021-03-10 21:51:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:51:44,124 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:44,124 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:51:44,124 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 21:51:44,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1428.2ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:51:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 21:51:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2021-03-10 21:51:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2148760330578514) internal successors, (268), 121 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 268 transitions. [2021-03-10 21:51:44,126 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 268 transitions. Word has length 18 [2021-03-10 21:51:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:44,126 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 268 transitions. [2021-03-10 21:51:44,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 268 transitions. [2021-03-10 21:51:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:44,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:44,126 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:44,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1019,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:44,341 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1569796716, now seen corresponding path program 158 times [2021-03-10 21:51:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:44,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784930871] [2021-03-10 21:51:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:44,600 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2021-03-10 21:51:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:44,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784930871] [2021-03-10 21:51:44,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680170835] [2021-03-10 21:51:44,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:44,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:44,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:44,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:44,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:45,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:45,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:45,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127544949] [2021-03-10 21:51:45,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:45,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:45,149 INFO L87 Difference]: Start difference. First operand 122 states and 268 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:46,097 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 21:51:46,366 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-03-10 21:51:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:46,963 INFO L93 Difference]: Finished difference Result 206 states and 404 transitions. [2021-03-10 21:51:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:51:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:46,964 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:51:46,964 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 21:51:46,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2176.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:51:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 21:51:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 120. [2021-03-10 21:51:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2184873949579833) internal successors, (264), 119 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 264 transitions. [2021-03-10 21:51:46,965 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 264 transitions. Word has length 18 [2021-03-10 21:51:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:46,965 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 264 transitions. [2021-03-10 21:51:46,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 264 transitions. [2021-03-10 21:51:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:46,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:46,966 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:47,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1030 [2021-03-10 21:51:47,171 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:47,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:47,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1475589924, now seen corresponding path program 159 times [2021-03-10 21:51:47,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:47,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950882401] [2021-03-10 21:51:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:47,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950882401] [2021-03-10 21:51:47,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2612921] [2021-03-10 21:51:47,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:47,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:47,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:47,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:51:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:47,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:47,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:47,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848266992] [2021-03-10 21:51:47,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:47,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:47,907 INFO L87 Difference]: Start difference. First operand 120 states and 264 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:48,452 INFO L93 Difference]: Finished difference Result 138 states and 291 transitions. [2021-03-10 21:51:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:51:48,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:48,453 INFO L225 Difference]: With dead ends: 138 [2021-03-10 21:51:48,453 INFO L226 Difference]: Without dead ends: 125 [2021-03-10 21:51:48,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:51:48,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-03-10 21:51:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2021-03-10 21:51:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2148760330578514) internal successors, (268), 121 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 268 transitions. [2021-03-10 21:51:48,455 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 268 transitions. Word has length 18 [2021-03-10 21:51:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:48,455 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 268 transitions. [2021-03-10 21:51:48,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 268 transitions. [2021-03-10 21:51:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:48,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:48,455 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:48,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:48,656 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:48,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:48,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1242035642, now seen corresponding path program 160 times [2021-03-10 21:51:48,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:48,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743291305] [2021-03-10 21:51:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:48,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743291305] [2021-03-10 21:51:48,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753216565] [2021-03-10 21:51:48,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:48,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:48,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:48,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:48,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:49,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:49,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:49,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879748117] [2021-03-10 21:51:49,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:49,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:49,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:49,409 INFO L87 Difference]: Start difference. First operand 122 states and 268 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:50,337 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-10 21:51:50,596 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-03-10 21:51:50,757 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-03-10 21:51:51,110 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 21:51:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:51,306 INFO L93 Difference]: Finished difference Result 181 states and 370 transitions. [2021-03-10 21:51:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:51:51,306 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:51,307 INFO L225 Difference]: With dead ends: 181 [2021-03-10 21:51:51,307 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 21:51:51,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2160.6ms TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:51:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 21:51:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 124. [2021-03-10 21:51:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.227642276422764) internal successors, (274), 123 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 274 transitions. [2021-03-10 21:51:51,308 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 274 transitions. Word has length 18 [2021-03-10 21:51:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:51,308 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 274 transitions. [2021-03-10 21:51:51,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 274 transitions. [2021-03-10 21:51:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:51,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:51,309 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:51,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-03-10 21:51:51,509 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1718340324, now seen corresponding path program 161 times [2021-03-10 21:51:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:51,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25854821] [2021-03-10 21:51:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:51,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25854821] [2021-03-10 21:51:51,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962579804] [2021-03-10 21:51:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:51,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:51:51,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:51,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:51:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:52,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:52,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:52,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858472181] [2021-03-10 21:51:52,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:52,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:52,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:52,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:52,189 INFO L87 Difference]: Start difference. First operand 124 states and 274 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:52,941 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-03-10 21:51:53,154 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-03-10 21:51:53,439 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-10 21:51:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:53,834 INFO L93 Difference]: Finished difference Result 216 states and 423 transitions. [2021-03-10 21:51:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:51:53,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:53,835 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:51:53,835 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 21:51:53,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1854.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:51:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 21:51:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 126. [2021-03-10 21:51:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-03-10 21:51:53,837 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-03-10 21:51:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:53,837 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-03-10 21:51:53,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-03-10 21:51:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:53,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:53,837 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:54,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:54,051 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1955577145, now seen corresponding path program 162 times [2021-03-10 21:51:54,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:54,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929436661] [2021-03-10 21:51:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:51:54,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929436661] [2021-03-10 21:51:54,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876061870] [2021-03-10 21:51:54,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:54,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:51:54,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:54,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:51:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:51:54,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:54,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:51:54,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624164885] [2021-03-10 21:51:54,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:51:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:51:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:51:54,331 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:54,750 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-03-10 21:51:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:51:54,751 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:54,751 INFO L225 Difference]: With dead ends: 157 [2021-03-10 21:51:54,751 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 21:51:54,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 21:51:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 126. [2021-03-10 21:51:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-03-10 21:51:54,753 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-03-10 21:51:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:54,753 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-03-10 21:51:54,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-03-10 21:51:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:54,753 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:54,753 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:54,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:54,953 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:54,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1748381908, now seen corresponding path program 163 times [2021-03-10 21:51:54,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:54,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807646937] [2021-03-10 21:51:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:55,212 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2021-03-10 21:51:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:55,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807646937] [2021-03-10 21:51:55,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275523535] [2021-03-10 21:51:55,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:55,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:51:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:55,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:55,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:55,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947527934] [2021-03-10 21:51:55,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:55,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:55,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:55,703 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:56,676 INFO L93 Difference]: Finished difference Result 177 states and 361 transitions. [2021-03-10 21:51:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:51:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:56,676 INFO L225 Difference]: With dead ends: 177 [2021-03-10 21:51:56,676 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 21:51:56,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1319.8ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:51:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 21:51:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2021-03-10 21:51:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.238095238095238) internal successors, (282), 126 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 282 transitions. [2021-03-10 21:51:56,678 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 282 transitions. Word has length 18 [2021-03-10 21:51:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:56,678 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 282 transitions. [2021-03-10 21:51:56,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 282 transitions. [2021-03-10 21:51:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:56,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:56,678 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:56,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:56,879 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1749849636, now seen corresponding path program 164 times [2021-03-10 21:51:56,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:56,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215264842] [2021-03-10 21:51:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:57,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215264842] [2021-03-10 21:51:57,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85296675] [2021-03-10 21:51:57,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:57,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:57,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:57,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 21:51:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:57,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:57,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:51:57,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102972995] [2021-03-10 21:51:57,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:51:57,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:57,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:51:57,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:57,463 INFO L87 Difference]: Start difference. First operand 127 states and 282 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:58,208 INFO L93 Difference]: Finished difference Result 197 states and 396 transitions. [2021-03-10 21:51:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:51:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:51:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:58,209 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:51:58,209 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 21:51:58,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:51:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 21:51:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2021-03-10 21:51:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-03-10 21:51:58,210 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-03-10 21:51:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:58,210 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-03-10 21:51:58,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-03-10 21:51:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:58,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:58,211 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:58,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-03-10 21:51:58,411 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash -208132746, now seen corresponding path program 165 times [2021-03-10 21:51:58,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:58,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304696196] [2021-03-10 21:51:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:58,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304696196] [2021-03-10 21:51:58,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723471164] [2021-03-10 21:51:58,660 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:58,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:58,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:51:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:59,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:59,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:51:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040002912] [2021-03-10 21:51:59,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:51:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:51:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:59,091 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:59,673 INFO L93 Difference]: Finished difference Result 156 states and 326 transitions. [2021-03-10 21:51:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:51:59,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:51:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:59,674 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:51:59,674 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 21:51:59,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:51:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 21:51:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 129. [2021-03-10 21:51:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.2421875) internal successors, (287), 128 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 287 transitions. [2021-03-10 21:51:59,676 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 287 transitions. Word has length 18 [2021-03-10 21:51:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:59,676 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 287 transitions. [2021-03-10 21:51:59,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 287 transitions. [2021-03-10 21:51:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:51:59,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:59,676 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:59,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-03-10 21:51:59,877 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1785474476, now seen corresponding path program 166 times [2021-03-10 21:51:59,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:59,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911814675] [2021-03-10 21:51:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911814675] [2021-03-10 21:52:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095223910] [2021-03-10 21:52:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:00,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:00,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:00,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:00,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:00,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:00,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:00,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401513494] [2021-03-10 21:52:00,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:00,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:00,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:00,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:00,596 INFO L87 Difference]: Start difference. First operand 129 states and 287 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:01,730 INFO L93 Difference]: Finished difference Result 174 states and 357 transitions. [2021-03-10 21:52:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:01,731 INFO L225 Difference]: With dead ends: 174 [2021-03-10 21:52:01,731 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 21:52:01,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1436.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:52:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 21:52:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 130. [2021-03-10 21:52:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.248062015503876) internal successors, (290), 129 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2021-03-10 21:52:01,733 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 18 [2021-03-10 21:52:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:01,733 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2021-03-10 21:52:01,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2021-03-10 21:52:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:01,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:01,733 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:01,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-03-10 21:52:01,934 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash -450883146, now seen corresponding path program 167 times [2021-03-10 21:52:01,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:01,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744482225] [2021-03-10 21:52:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:02,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744482225] [2021-03-10 21:52:02,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909169461] [2021-03-10 21:52:02,130 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:02,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:02,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:02,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:02,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:02,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539442490] [2021-03-10 21:52:02,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:02,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:02,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:02,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:02,635 INFO L87 Difference]: Start difference. First operand 130 states and 290 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:02,885 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-03-10 21:52:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:03,883 INFO L93 Difference]: Finished difference Result 201 states and 408 transitions. [2021-03-10 21:52:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:03,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:03,884 INFO L225 Difference]: With dead ends: 201 [2021-03-10 21:52:03,884 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 21:52:03,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1450.4ms TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:52:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 21:52:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 132. [2021-03-10 21:52:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.2442748091603053) internal successors, (294), 131 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 294 transitions. [2021-03-10 21:52:03,886 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 294 transitions. Word has length 18 [2021-03-10 21:52:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:03,886 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 294 transitions. [2021-03-10 21:52:03,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 294 transitions. [2021-03-10 21:52:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:03,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:03,886 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:04,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1135,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:04,087 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1279128210, now seen corresponding path program 168 times [2021-03-10 21:52:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:04,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803505780] [2021-03-10 21:52:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:04,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803505780] [2021-03-10 21:52:04,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712571560] [2021-03-10 21:52:04,375 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:04,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:52:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:04,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:04,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:04,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609469526] [2021-03-10 21:52:04,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:04,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:04,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:04,822 INFO L87 Difference]: Start difference. First operand 132 states and 294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:06,220 INFO L93 Difference]: Finished difference Result 214 states and 426 transitions. [2021-03-10 21:52:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:06,221 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:52:06,221 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:52:06,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1748.2ms TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:52:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:52:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 133. [2021-03-10 21:52:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.242424242424242) internal successors, (296), 132 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 296 transitions. [2021-03-10 21:52:06,223 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 296 transitions. Word has length 18 [2021-03-10 21:52:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:06,223 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 296 transitions. [2021-03-10 21:52:06,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 296 transitions. [2021-03-10 21:52:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:06,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:06,224 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:06,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1148 [2021-03-10 21:52:06,424 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:06,424 INFO L82 PathProgramCache]: Analyzing trace with hash -482392458, now seen corresponding path program 169 times [2021-03-10 21:52:06,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:06,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75268786] [2021-03-10 21:52:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75268786] [2021-03-10 21:52:06,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248426779] [2021-03-10 21:52:06,636 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:06,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:06,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:06,973 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:52:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:07,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:07,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:07,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591782044] [2021-03-10 21:52:07,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:07,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:07,140 INFO L87 Difference]: Start difference. First operand 133 states and 296 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:07,418 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 21:52:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:07,671 INFO L93 Difference]: Finished difference Result 198 states and 411 transitions. [2021-03-10 21:52:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:07,672 INFO L225 Difference]: With dead ends: 198 [2021-03-10 21:52:07,672 INFO L226 Difference]: Without dead ends: 179 [2021-03-10 21:52:07,672 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 850.4ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:52:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-03-10 21:52:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2021-03-10 21:52:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.2442748091603053) internal successors, (294), 131 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 294 transitions. [2021-03-10 21:52:07,674 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 294 transitions. Word has length 18 [2021-03-10 21:52:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:07,674 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 294 transitions. [2021-03-10 21:52:07,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 294 transitions. [2021-03-10 21:52:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:07,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:07,674 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:07,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1160,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:07,875 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1532704148, now seen corresponding path program 170 times [2021-03-10 21:52:07,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:07,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219766088] [2021-03-10 21:52:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:08,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219766088] [2021-03-10 21:52:08,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277682721] [2021-03-10 21:52:08,134 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:08,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:08,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:52:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:08,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:08,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:08,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360913774] [2021-03-10 21:52:08,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:08,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:08,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:08,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:08,543 INFO L87 Difference]: Start difference. First operand 132 states and 294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:09,378 INFO L93 Difference]: Finished difference Result 170 states and 362 transitions. [2021-03-10 21:52:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:52:09,379 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:09,379 INFO L225 Difference]: With dead ends: 170 [2021-03-10 21:52:09,379 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 21:52:09,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1123.5ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:52:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 21:52:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2021-03-10 21:52:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.2388059701492535) internal successors, (300), 134 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 300 transitions. [2021-03-10 21:52:09,381 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 300 transitions. Word has length 18 [2021-03-10 21:52:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:09,381 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 300 transitions. [2021-03-10 21:52:09,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 300 transitions. [2021-03-10 21:52:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:09,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:09,381 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:09,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1172 [2021-03-10 21:52:09,582 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1427671818, now seen corresponding path program 171 times [2021-03-10 21:52:09,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:09,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179621239] [2021-03-10 21:52:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:09,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179621239] [2021-03-10 21:52:09,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806099047] [2021-03-10 21:52:09,774 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:09,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:52:09,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:52:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:10,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:10,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:10,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661795386] [2021-03-10 21:52:10,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:10,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:10,193 INFO L87 Difference]: Start difference. First operand 135 states and 300 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:11,108 INFO L93 Difference]: Finished difference Result 198 states and 408 transitions. [2021-03-10 21:52:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:11,108 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:11,109 INFO L225 Difference]: With dead ends: 198 [2021-03-10 21:52:11,109 INFO L226 Difference]: Without dead ends: 179 [2021-03-10 21:52:11,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1081.1ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-03-10 21:52:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 134. [2021-03-10 21:52:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2406015037593985) internal successors, (298), 133 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 298 transitions. [2021-03-10 21:52:11,111 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 298 transitions. Word has length 18 [2021-03-10 21:52:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:11,111 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 298 transitions. [2021-03-10 21:52:11,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 298 transitions. [2021-03-10 21:52:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:11,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:11,111 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:11,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:11,312 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:11,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1965527396, now seen corresponding path program 172 times [2021-03-10 21:52:11,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:11,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357224395] [2021-03-10 21:52:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:11,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357224395] [2021-03-10 21:52:11,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382497669] [2021-03-10 21:52:11,494 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:11,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:11,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:11,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:11,842 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:52:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:12,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:12,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599164524] [2021-03-10 21:52:12,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:12,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:12,010 INFO L87 Difference]: Start difference. First operand 134 states and 298 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:12,369 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 21:52:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:12,614 INFO L93 Difference]: Finished difference Result 197 states and 409 transitions. [2021-03-10 21:52:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:52:12,615 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:12,615 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:52:12,615 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 21:52:12,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 944.5ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:52:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 21:52:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-03-10 21:52:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2406015037593985) internal successors, (298), 133 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 298 transitions. [2021-03-10 21:52:12,617 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 298 transitions. Word has length 18 [2021-03-10 21:52:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:12,617 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 298 transitions. [2021-03-10 21:52:12,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 298 transitions. [2021-03-10 21:52:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:12,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:12,618 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:12,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-03-10 21:52:12,818 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1459181130, now seen corresponding path program 173 times [2021-03-10 21:52:12,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:12,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663674299] [2021-03-10 21:52:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:13,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663674299] [2021-03-10 21:52:13,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433834098] [2021-03-10 21:52:13,009 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:13,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:52:13,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:52:13,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:13,372 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:52:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:13,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:13,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:13,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175332005] [2021-03-10 21:52:13,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:13,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:13,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:13,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:13,621 INFO L87 Difference]: Start difference. First operand 134 states and 298 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:13,969 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 21:52:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:14,569 INFO L93 Difference]: Finished difference Result 232 states and 474 transitions. [2021-03-10 21:52:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:52:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:14,570 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:52:14,570 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 21:52:14,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1274.1ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 21:52:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 134. [2021-03-10 21:52:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2406015037593985) internal successors, (298), 133 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 298 transitions. [2021-03-10 21:52:14,572 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 298 transitions. Word has length 18 [2021-03-10 21:52:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:14,572 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 298 transitions. [2021-03-10 21:52:14,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 298 transitions. [2021-03-10 21:52:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:14,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:14,572 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:14,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-03-10 21:52:14,773 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 428334108, now seen corresponding path program 174 times [2021-03-10 21:52:14,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:14,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583043530] [2021-03-10 21:52:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:15,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583043530] [2021-03-10 21:52:15,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059432058] [2021-03-10 21:52:15,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:15,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:52:15,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:15,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:15,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:15,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115946929] [2021-03-10 21:52:15,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:15,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:15,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:15,469 INFO L87 Difference]: Start difference. First operand 134 states and 298 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:15,926 INFO L93 Difference]: Finished difference Result 153 states and 327 transitions. [2021-03-10 21:52:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:52:15,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:15,927 INFO L225 Difference]: With dead ends: 153 [2021-03-10 21:52:15,927 INFO L226 Difference]: Without dead ends: 140 [2021-03-10 21:52:15,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:52:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-03-10 21:52:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2021-03-10 21:52:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.235294117647059) internal successors, (304), 136 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 304 transitions. [2021-03-10 21:52:15,929 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 304 transitions. Word has length 18 [2021-03-10 21:52:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:15,929 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 304 transitions. [2021-03-10 21:52:15,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 304 transitions. [2021-03-10 21:52:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:15,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:15,930 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:16,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-03-10 21:52:16,130 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1149007622, now seen corresponding path program 175 times [2021-03-10 21:52:16,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:16,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142324814] [2021-03-10 21:52:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:16,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142324814] [2021-03-10 21:52:16,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149481711] [2021-03-10 21:52:16,379 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:16,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:52:16,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:16,782 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 21:52:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:17,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:17,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:17,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423145662] [2021-03-10 21:52:17,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:17,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:17,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:17,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:17,100 INFO L87 Difference]: Start difference. First operand 137 states and 304 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:17,359 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 21:52:17,514 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-10 21:52:17,751 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 21:52:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:18,153 INFO L93 Difference]: Finished difference Result 179 states and 370 transitions. [2021-03-10 21:52:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:52:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:18,154 INFO L225 Difference]: With dead ends: 179 [2021-03-10 21:52:18,154 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:52:18,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1551.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:52:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:52:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 138. [2021-03-10 21:52:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.2335766423357666) internal successors, (306), 137 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 306 transitions. [2021-03-10 21:52:18,156 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 306 transitions. Word has length 18 [2021-03-10 21:52:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:18,156 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 306 transitions. [2021-03-10 21:52:18,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 306 transitions. [2021-03-10 21:52:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:18,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:18,156 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:18,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-03-10 21:52:18,357 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash 185583708, now seen corresponding path program 176 times [2021-03-10 21:52:18,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:18,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020440100] [2021-03-10 21:52:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:18,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020440100] [2021-03-10 21:52:18,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616583394] [2021-03-10 21:52:18,548 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:18,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:18,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:18,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 21:52:18,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:19,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:19,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:19,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356921853] [2021-03-10 21:52:19,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:19,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:19,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:19,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:19,014 INFO L87 Difference]: Start difference. First operand 138 states and 306 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:19,756 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-03-10 21:52:19,941 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-03-10 21:52:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:20,073 INFO L93 Difference]: Finished difference Result 213 states and 429 transitions. [2021-03-10 21:52:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:52:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:20,074 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:52:20,074 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 21:52:20,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1240.3ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:52:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 21:52:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 136. [2021-03-10 21:52:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.237037037037037) internal successors, (302), 135 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 302 transitions. [2021-03-10 21:52:20,075 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 302 transitions. Word has length 18 [2021-03-10 21:52:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:20,076 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 302 transitions. [2021-03-10 21:52:20,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 302 transitions. [2021-03-10 21:52:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:20,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:20,076 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:20,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1242 [2021-03-10 21:52:20,291 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:20,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:20,291 INFO L82 PathProgramCache]: Analyzing trace with hash -642661356, now seen corresponding path program 177 times [2021-03-10 21:52:20,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:20,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182862241] [2021-03-10 21:52:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:20,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182862241] [2021-03-10 21:52:20,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573904653] [2021-03-10 21:52:20,578 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:20,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:52:20,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:21,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:21,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:21,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537785420] [2021-03-10 21:52:21,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:21,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:21,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:21,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:21,038 INFO L87 Difference]: Start difference. First operand 136 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:21,651 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 21:52:21,777 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 21:52:21,944 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-03-10 21:52:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:22,119 INFO L93 Difference]: Finished difference Result 188 states and 387 transitions. [2021-03-10 21:52:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:52:22,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:22,120 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:52:22,120 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 21:52:22,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1397.4ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 21:52:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2021-03-10 21:52:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.235294117647059) internal successors, (304), 136 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 304 transitions. [2021-03-10 21:52:22,122 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 304 transitions. Word has length 18 [2021-03-10 21:52:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:22,122 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 304 transitions. [2021-03-10 21:52:22,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 304 transitions. [2021-03-10 21:52:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:22,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:22,122 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:22,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-03-10 21:52:22,322 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:22,323 INFO L82 PathProgramCache]: Analyzing trace with hash 154074396, now seen corresponding path program 178 times [2021-03-10 21:52:22,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:22,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416363317] [2021-03-10 21:52:22,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416363317] [2021-03-10 21:52:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90497162] [2021-03-10 21:52:22,542 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:22,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:22,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:22,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:22,891 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:52:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:23,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:23,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:23,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135385308] [2021-03-10 21:52:23,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:23,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:23,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:23,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:23,076 INFO L87 Difference]: Start difference. First operand 137 states and 304 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:23,772 INFO L93 Difference]: Finished difference Result 205 states and 413 transitions. [2021-03-10 21:52:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:23,772 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:23,773 INFO L225 Difference]: With dead ends: 205 [2021-03-10 21:52:23,773 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 21:52:23,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 915.6ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:52:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 21:52:23,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-03-10 21:52:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.237037037037037) internal successors, (302), 135 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 302 transitions. [2021-03-10 21:52:23,775 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 302 transitions. Word has length 18 [2021-03-10 21:52:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:23,775 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 302 transitions. [2021-03-10 21:52:23,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 302 transitions. [2021-03-10 21:52:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:23,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:23,775 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:23,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-03-10 21:52:23,975 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2125796294, now seen corresponding path program 179 times [2021-03-10 21:52:23,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:23,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354688198] [2021-03-10 21:52:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:24,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354688198] [2021-03-10 21:52:24,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646668381] [2021-03-10 21:52:24,247 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:24,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:24,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:24,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:24,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:24,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639604140] [2021-03-10 21:52:24,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:24,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:24,669 INFO L87 Difference]: Start difference. First operand 136 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:25,049 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-03-10 21:52:25,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:25,610 INFO L93 Difference]: Finished difference Result 180 states and 378 transitions. [2021-03-10 21:52:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:25,611 INFO L225 Difference]: With dead ends: 180 [2021-03-10 21:52:25,611 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:52:25,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1252.2ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:52:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:52:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 139. [2021-03-10 21:52:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.239130434782609) internal successors, (309), 138 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 309 transitions. [2021-03-10 21:52:25,613 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 309 transitions. Word has length 18 [2021-03-10 21:52:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:25,613 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 309 transitions. [2021-03-10 21:52:25,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 309 transitions. [2021-03-10 21:52:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:25,613 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:25,613 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:25,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1278,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:25,828 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash -791204964, now seen corresponding path program 180 times [2021-03-10 21:52:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:25,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682860977] [2021-03-10 21:52:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:26,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682860977] [2021-03-10 21:52:26,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133637429] [2021-03-10 21:52:26,074 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:26,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:52:26,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:26,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:26,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:26,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:26,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351486249] [2021-03-10 21:52:26,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:26,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:26,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:26,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:26,495 INFO L87 Difference]: Start difference. First operand 139 states and 309 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:27,510 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-03-10 21:52:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:52:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:27,512 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:52:27,512 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:52:27,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1256.2ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:52:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:52:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2021-03-10 21:52:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.2302158273381294) internal successors, (310), 139 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 310 transitions. [2021-03-10 21:52:27,513 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 310 transitions. Word has length 18 [2021-03-10 21:52:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:27,514 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 310 transitions. [2021-03-10 21:52:27,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 310 transitions. [2021-03-10 21:52:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:27,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:27,514 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:27,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:27,714 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:27,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1329060542, now seen corresponding path program 181 times [2021-03-10 21:52:27,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:27,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277154817] [2021-03-10 21:52:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:27,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277154817] [2021-03-10 21:52:27,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320265810] [2021-03-10 21:52:27,947 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:27,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:28,313 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:52:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:28,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:28,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:28,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36588518] [2021-03-10 21:52:28,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:28,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:28,485 INFO L87 Difference]: Start difference. First operand 140 states and 310 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:29,252 INFO L93 Difference]: Finished difference Result 206 states and 415 transitions. [2021-03-10 21:52:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:29,253 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:29,253 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:52:29,253 INFO L226 Difference]: Without dead ends: 184 [2021-03-10 21:52:29,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1074.4ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:52:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-10 21:52:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 140. [2021-03-10 21:52:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.2302158273381294) internal successors, (310), 139 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 310 transitions. [2021-03-10 21:52:29,255 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 310 transitions. Word has length 18 [2021-03-10 21:52:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:29,255 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 310 transitions. [2021-03-10 21:52:29,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 310 transitions. [2021-03-10 21:52:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:29,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:29,255 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:29,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:29,456 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:29,456 INFO L82 PathProgramCache]: Analyzing trace with hash -822714276, now seen corresponding path program 182 times [2021-03-10 21:52:29,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:29,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799625370] [2021-03-10 21:52:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:29,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799625370] [2021-03-10 21:52:29,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594308989] [2021-03-10 21:52:29,638 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:29,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:29,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 21:52:29,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:30,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:30,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:52:30,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157226495] [2021-03-10 21:52:30,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:52:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:52:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:30,088 INFO L87 Difference]: Start difference. First operand 140 states and 310 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:30,965 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-03-10 21:52:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:30,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:52:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:30,966 INFO L225 Difference]: With dead ends: 210 [2021-03-10 21:52:30,966 INFO L226 Difference]: Without dead ends: 185 [2021-03-10 21:52:30,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1030.2ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-03-10 21:52:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2021-03-10 21:52:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2285714285714286) internal successors, (312), 140 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 312 transitions. [2021-03-10 21:52:30,968 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 312 transitions. Word has length 18 [2021-03-10 21:52:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:30,968 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 312 transitions. [2021-03-10 21:52:30,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 312 transitions. [2021-03-10 21:52:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:30,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:30,968 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:31,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-03-10 21:52:31,169 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash -858339116, now seen corresponding path program 183 times [2021-03-10 21:52:31,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:31,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841496009] [2021-03-10 21:52:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:31,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841496009] [2021-03-10 21:52:31,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889400204] [2021-03-10 21:52:31,454 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:31,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:52:31,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:31,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 21:52:31,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:31,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:31,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:31,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167143553] [2021-03-10 21:52:31,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:31,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:31,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:31,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:31,896 INFO L87 Difference]: Start difference. First operand 141 states and 312 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:32,593 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-03-10 21:52:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:32,712 INFO L93 Difference]: Finished difference Result 186 states and 388 transitions. [2021-03-10 21:52:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:32,713 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:52:32,713 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:52:32,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1117.0ms TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:52:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:52:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2021-03-10 21:52:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.2222222222222223) internal successors, (320), 144 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 320 transitions. [2021-03-10 21:52:32,714 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 320 transitions. Word has length 18 [2021-03-10 21:52:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:32,714 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 320 transitions. [2021-03-10 21:52:32,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 320 transitions. [2021-03-10 21:52:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:32,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:32,715 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:32,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:32,915 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash 476252214, now seen corresponding path program 184 times [2021-03-10 21:52:32,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:32,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077018784] [2021-03-10 21:52:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:33,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077018784] [2021-03-10 21:52:33,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331737157] [2021-03-10 21:52:33,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:33,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:33,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:33,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:33,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:33,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119021515] [2021-03-10 21:52:33,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:33,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:33,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:33,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:33,544 INFO L87 Difference]: Start difference. First operand 145 states and 320 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:34,225 INFO L93 Difference]: Finished difference Result 194 states and 398 transitions. [2021-03-10 21:52:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:52:34,225 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:34,226 INFO L225 Difference]: With dead ends: 194 [2021-03-10 21:52:34,226 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:52:34,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 909.2ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:52:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:52:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2021-03-10 21:52:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-03-10 21:52:34,228 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-03-10 21:52:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:34,228 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-03-10 21:52:34,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-03-10 21:52:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:34,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:34,228 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:34,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-03-10 21:52:34,428 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash -61603364, now seen corresponding path program 185 times [2021-03-10 21:52:34,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:34,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697464762] [2021-03-10 21:52:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:34,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697464762] [2021-03-10 21:52:34,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609468465] [2021-03-10 21:52:34,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:34,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:35,034 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:52:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:35,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:35,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:35,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474744086] [2021-03-10 21:52:35,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:35,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:35,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:35,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:35,213 INFO L87 Difference]: Start difference. First operand 146 states and 322 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:35,976 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 21:52:36,132 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-03-10 21:52:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:36,334 INFO L93 Difference]: Finished difference Result 226 states and 450 transitions. [2021-03-10 21:52:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:52:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:36,343 INFO L225 Difference]: With dead ends: 226 [2021-03-10 21:52:36,343 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:52:36,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1454.7ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:52:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:52:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 146. [2021-03-10 21:52:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-03-10 21:52:36,345 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-03-10 21:52:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:36,345 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-03-10 21:52:36,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-03-10 21:52:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:36,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:36,345 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:36,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-03-10 21:52:36,562 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash 444742902, now seen corresponding path program 186 times [2021-03-10 21:52:36,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:36,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959388474] [2021-03-10 21:52:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:36,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959388474] [2021-03-10 21:52:36,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719818644] [2021-03-10 21:52:36,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:36,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:52:36,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:37,086 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:52:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:37,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:37,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:37,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686653779] [2021-03-10 21:52:37,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:37,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:37,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:37,320 INFO L87 Difference]: Start difference. First operand 146 states and 322 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:39,239 INFO L93 Difference]: Finished difference Result 262 states and 514 transitions. [2021-03-10 21:52:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:52:39,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:39,240 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:52:39,240 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 21:52:39,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2170.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:52:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 21:52:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2021-03-10 21:52:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.222972972972973) internal successors, (329), 148 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 329 transitions. [2021-03-10 21:52:39,242 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 329 transitions. Word has length 18 [2021-03-10 21:52:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:39,242 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 329 transitions. [2021-03-10 21:52:39,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 329 transitions. [2021-03-10 21:52:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:39,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:39,243 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:39,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1366,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:39,449 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:39,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1038392036, now seen corresponding path program 187 times [2021-03-10 21:52:39,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:39,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166781630] [2021-03-10 21:52:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:39,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166781630] [2021-03-10 21:52:39,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987703205] [2021-03-10 21:52:39,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:40,069 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 21:52:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:40,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:40,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:40,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620024204] [2021-03-10 21:52:40,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:40,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:40,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:40,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:40,380 INFO L87 Difference]: Start difference. First operand 149 states and 329 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:40,877 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:52:41,028 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-03-10 21:52:41,593 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-03-10 21:52:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:41,787 INFO L93 Difference]: Finished difference Result 233 states and 463 transitions. [2021-03-10 21:52:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:52:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:41,789 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:52:41,789 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:52:41,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1853.4ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:52:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:52:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 150. [2021-03-10 21:52:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.221476510067114) internal successors, (331), 149 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 331 transitions. [2021-03-10 21:52:41,791 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 331 transitions. Word has length 18 [2021-03-10 21:52:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:41,791 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 331 transitions. [2021-03-10 21:52:41,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 331 transitions. [2021-03-10 21:52:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:41,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:41,791 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:41,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-03-10 21:52:41,999 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:42,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1142907740, now seen corresponding path program 188 times [2021-03-10 21:52:42,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:42,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955824853] [2021-03-10 21:52:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:42,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955824853] [2021-03-10 21:52:42,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785111018] [2021-03-10 21:52:42,187 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:42,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:42,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:42,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 21:52:42,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:42,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:42,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:42,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561761210] [2021-03-10 21:52:42,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:42,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:42,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:42,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:42,606 INFO L87 Difference]: Start difference. First operand 150 states and 331 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:42,880 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-10 21:52:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:43,101 INFO L93 Difference]: Finished difference Result 168 states and 357 transitions. [2021-03-10 21:52:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:52:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:43,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:43,102 INFO L225 Difference]: With dead ends: 168 [2021-03-10 21:52:43,102 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 21:52:43,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:52:43,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 21:52:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2021-03-10 21:52:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.22) internal successors, (333), 150 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 333 transitions. [2021-03-10 21:52:43,103 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 333 transitions. Word has length 18 [2021-03-10 21:52:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:43,103 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 333 transitions. [2021-03-10 21:52:43,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 333 transitions. [2021-03-10 21:52:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:43,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:43,104 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:43,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1388,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:43,304 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:43,304 INFO L82 PathProgramCache]: Analyzing trace with hash -510045634, now seen corresponding path program 189 times [2021-03-10 21:52:43,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:43,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163403446] [2021-03-10 21:52:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163403446] [2021-03-10 21:52:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680951532] [2021-03-10 21:52:43,516 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:43,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:52:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:43,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:44,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:44,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:44,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072974248] [2021-03-10 21:52:44,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:44,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:44,021 INFO L87 Difference]: Start difference. First operand 151 states and 333 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:44,787 INFO L93 Difference]: Finished difference Result 187 states and 396 transitions. [2021-03-10 21:52:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:52:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:44,788 INFO L225 Difference]: With dead ends: 187 [2021-03-10 21:52:44,788 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 21:52:44,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1096.6ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:52:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 21:52:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-03-10 21:52:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.218543046357616) internal successors, (335), 151 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 335 transitions. [2021-03-10 21:52:44,790 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 335 transitions. Word has length 18 [2021-03-10 21:52:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:44,790 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 335 transitions. [2021-03-10 21:52:44,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:44,790 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 335 transitions. [2021-03-10 21:52:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:44,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:44,790 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:44,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1402 [2021-03-10 21:52:44,990 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2087387364, now seen corresponding path program 190 times [2021-03-10 21:52:44,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:44,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663329956] [2021-03-10 21:52:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:45,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663329956] [2021-03-10 21:52:45,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411101205] [2021-03-10 21:52:45,310 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:45,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:45,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:45,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:45,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:45,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692953128] [2021-03-10 21:52:45,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:45,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:45,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:45,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:45,841 INFO L87 Difference]: Start difference. First operand 152 states and 335 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:46,713 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-03-10 21:52:46,944 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 21:52:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:46,959 INFO L93 Difference]: Finished difference Result 192 states and 397 transitions. [2021-03-10 21:52:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:52:46,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:46,960 INFO L225 Difference]: With dead ends: 192 [2021-03-10 21:52:46,960 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 21:52:46,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1586.8ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:52:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 21:52:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 153. [2021-03-10 21:52:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2171052631578947) internal successors, (337), 152 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 337 transitions. [2021-03-10 21:52:46,962 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 337 transitions. Word has length 18 [2021-03-10 21:52:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:46,962 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 337 transitions. [2021-03-10 21:52:46,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 337 transitions. [2021-03-10 21:52:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:46,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:46,962 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:47,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:47,163 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:47,163 INFO L82 PathProgramCache]: Analyzing trace with hash -752796034, now seen corresponding path program 191 times [2021-03-10 21:52:47,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:47,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84249540] [2021-03-10 21:52:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84249540] [2021-03-10 21:52:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137167988] [2021-03-10 21:52:47,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:47,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:52:47,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:47,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:47,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:47,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126972974] [2021-03-10 21:52:47,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:47,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:47,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:47,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:47,887 INFO L87 Difference]: Start difference. First operand 153 states and 337 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:48,670 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 21:52:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:48,804 INFO L93 Difference]: Finished difference Result 202 states and 415 transitions. [2021-03-10 21:52:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:52:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:48,805 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:52:48,805 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 21:52:48,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1249.9ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:52:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 21:52:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 152. [2021-03-10 21:52:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.218543046357616) internal successors, (335), 151 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 335 transitions. [2021-03-10 21:52:48,807 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 335 transitions. Word has length 18 [2021-03-10 21:52:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:48,807 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 335 transitions. [2021-03-10 21:52:48,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 335 transitions. [2021-03-10 21:52:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:48,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:48,807 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:49,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:49,008 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1993180572, now seen corresponding path program 192 times [2021-03-10 21:52:49,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:49,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259401041] [2021-03-10 21:52:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:49,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259401041] [2021-03-10 21:52:49,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345814730] [2021-03-10 21:52:49,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:49,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:52:49,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:49,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:52:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:49,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:49,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:49,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372198661] [2021-03-10 21:52:49,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:49,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:49,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:49,721 INFO L87 Difference]: Start difference. First operand 152 states and 335 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:50,243 INFO L93 Difference]: Finished difference Result 169 states and 360 transitions. [2021-03-10 21:52:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:52:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:50,244 INFO L225 Difference]: With dead ends: 169 [2021-03-10 21:52:50,244 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:52:50,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:52:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:52:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-03-10 21:52:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.215686274509804) internal successors, (339), 153 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 339 transitions. [2021-03-10 21:52:50,246 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 339 transitions. Word has length 18 [2021-03-10 21:52:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:50,246 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 339 transitions. [2021-03-10 21:52:50,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 339 transitions. [2021-03-10 21:52:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:50,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:50,246 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:50,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-03-10 21:52:50,447 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash 724444994, now seen corresponding path program 193 times [2021-03-10 21:52:50,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:50,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463968957] [2021-03-10 21:52:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:50,696 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2021-03-10 21:52:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:50,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463968957] [2021-03-10 21:52:50,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859605149] [2021-03-10 21:52:50,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:51,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:51,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:51,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436195562] [2021-03-10 21:52:51,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:51,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:51,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:51,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:51,211 INFO L87 Difference]: Start difference. First operand 154 states and 339 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:52,447 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 21:52:52,596 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-03-10 21:52:52,747 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-03-10 21:52:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:53,115 INFO L93 Difference]: Finished difference Result 250 states and 492 transitions. [2021-03-10 21:52:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:52:53,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:53,116 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:52:53,116 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:52:53,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2173.4ms TimeCoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:52:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:52:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-03-10 21:52:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-03-10 21:52:53,118 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 18 [2021-03-10 21:52:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:53,118 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-03-10 21:52:53,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-03-10 21:52:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:53,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:53,118 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:53,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1452 [2021-03-10 21:52:53,333 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2059036324, now seen corresponding path program 194 times [2021-03-10 21:52:53,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:53,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065853968] [2021-03-10 21:52:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:53,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065853968] [2021-03-10 21:52:53,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667425948] [2021-03-10 21:52:53,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:53,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:53,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:53,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:53,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:54,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:54,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:54,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858902494] [2021-03-10 21:52:54,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:54,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:54,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:54,017 INFO L87 Difference]: Start difference. First operand 155 states and 341 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:54,781 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-03-10 21:52:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:54,911 INFO L93 Difference]: Finished difference Result 203 states and 417 transitions. [2021-03-10 21:52:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:52:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:54,912 INFO L225 Difference]: With dead ends: 203 [2021-03-10 21:52:54,912 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 21:52:54,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1175.8ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:52:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 21:52:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 156. [2021-03-10 21:52:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2129032258064516) internal successors, (343), 155 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 343 transitions. [2021-03-10 21:52:54,913 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 343 transitions. Word has length 18 [2021-03-10 21:52:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:54,913 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 343 transitions. [2021-03-10 21:52:54,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 343 transitions. [2021-03-10 21:52:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:54,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:54,914 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:55,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-03-10 21:52:55,114 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1230791260, now seen corresponding path program 195 times [2021-03-10 21:52:55,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:55,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924941161] [2021-03-10 21:52:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:55,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924941161] [2021-03-10 21:52:55,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446404433] [2021-03-10 21:52:55,390 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:55,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:52:55,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:55,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:52:55,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:55,792 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:52:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:55,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:55,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:55,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891529607] [2021-03-10 21:52:55,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:55,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:55,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:55,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:55,950 INFO L87 Difference]: Start difference. First operand 156 states and 343 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:56,369 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 21:52:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:56,637 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-03-10 21:52:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:52:56,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:56,638 INFO L225 Difference]: With dead ends: 187 [2021-03-10 21:52:56,638 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 21:52:56,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1175.0ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:52:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 21:52:56,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 158. [2021-03-10 21:52:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.210191082802548) internal successors, (347), 157 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 347 transitions. [2021-03-10 21:52:56,640 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 347 transitions. Word has length 18 [2021-03-10 21:52:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:56,640 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 347 transitions. [2021-03-10 21:52:56,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 347 transitions. [2021-03-10 21:52:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:56,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:56,640 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:56,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-03-10 21:52:56,841 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:56,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:56,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1729584706, now seen corresponding path program 196 times [2021-03-10 21:52:56,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:56,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491435091] [2021-03-10 21:52:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:57,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491435091] [2021-03-10 21:52:57,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619270172] [2021-03-10 21:52:57,006 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:57,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:57,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:57,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:57,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:57,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139883001] [2021-03-10 21:52:57,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:57,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:57,435 INFO L87 Difference]: Start difference. First operand 158 states and 347 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:58,343 INFO L93 Difference]: Finished difference Result 219 states and 443 transitions. [2021-03-10 21:52:58,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:52:58,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:52:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:58,344 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:52:58,344 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:52:58,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1125.4ms TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:52:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:52:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2021-03-10 21:52:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2115384615384617) internal successors, (345), 156 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 345 transitions. [2021-03-10 21:52:58,346 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 345 transitions. Word has length 18 [2021-03-10 21:52:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:58,346 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 345 transitions. [2021-03-10 21:52:58,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 345 transitions. [2021-03-10 21:52:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:52:58,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:58,346 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:58,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1488 [2021-03-10 21:52:58,547 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2027527012, now seen corresponding path program 197 times [2021-03-10 21:52:58,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:58,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593199802] [2021-03-10 21:52:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:58,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593199802] [2021-03-10 21:52:58,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931367705] [2021-03-10 21:52:58,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:58,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:52:58,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:58,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:52:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:59,134 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:52:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:59,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:59,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:52:59,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154657029] [2021-03-10 21:52:59,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:52:59,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:59,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:52:59,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:59,296 INFO L87 Difference]: Start difference. First operand 157 states and 345 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:59,721 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 21:53:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:00,543 INFO L93 Difference]: Finished difference Result 237 states and 478 transitions. [2021-03-10 21:53:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:53:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:53:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:00,544 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:53:00,544 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:53:00,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1535.6ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:53:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:53:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2021-03-10 21:53:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-03-10 21:53:00,546 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 18 [2021-03-10 21:53:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:00,546 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-03-10 21:53:00,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-03-10 21:53:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:00,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:00,546 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:00,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1501 [2021-03-10 21:53:00,746 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:00,747 INFO L82 PathProgramCache]: Analyzing trace with hash -725723394, now seen corresponding path program 198 times [2021-03-10 21:53:00,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:00,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104081090] [2021-03-10 21:53:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:01,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104081090] [2021-03-10 21:53:01,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378893937] [2021-03-10 21:53:01,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:01,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:53:01,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:01,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:01,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:01,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:01,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908533178] [2021-03-10 21:53:01,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:01,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:01,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:01,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:01,510 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:02,010 INFO L93 Difference]: Finished difference Result 176 states and 377 transitions. [2021-03-10 21:53:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:53:02,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:02,011 INFO L225 Difference]: With dead ends: 176 [2021-03-10 21:53:02,012 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 21:53:02,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 916.7ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:53:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 21:53:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2021-03-10 21:53:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.225) internal successors, (356), 160 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 356 transitions. [2021-03-10 21:53:02,013 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 356 transitions. Word has length 18 [2021-03-10 21:53:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:02,013 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 356 transitions. [2021-03-10 21:53:02,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 356 transitions. [2021-03-10 21:53:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:02,014 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:02,014 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:02,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1512,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:02,214 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1991902172, now seen corresponding path program 199 times [2021-03-10 21:53:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:02,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379200806] [2021-03-10 21:53:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:02,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379200806] [2021-03-10 21:53:02,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261113320] [2021-03-10 21:53:02,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:02,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:02,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:03,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:03,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:03,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671111529] [2021-03-10 21:53:03,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:03,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:03,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:03,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:03,046 INFO L87 Difference]: Start difference. First operand 161 states and 356 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:03,871 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2021-03-10 21:53:04,100 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-03-10 21:53:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:04,202 INFO L93 Difference]: Finished difference Result 212 states and 434 transitions. [2021-03-10 21:53:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:53:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:04,204 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:53:04,204 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:53:04,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1598.1ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:53:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:53:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 162. [2021-03-10 21:53:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.2236024844720497) internal successors, (358), 161 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 358 transitions. [2021-03-10 21:53:04,206 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 358 transitions. Word has length 18 [2021-03-10 21:53:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:04,206 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 358 transitions. [2021-03-10 21:53:04,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 358 transitions. [2021-03-10 21:53:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:04,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:04,206 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:04,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1524 [2021-03-10 21:53:04,422 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:04,422 INFO L82 PathProgramCache]: Analyzing trace with hash -968473794, now seen corresponding path program 200 times [2021-03-10 21:53:04,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:04,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309970013] [2021-03-10 21:53:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:04,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309970013] [2021-03-10 21:53:04,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573818527] [2021-03-10 21:53:04,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:04,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:04,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:04,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:04,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:05,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:05,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:05,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393468732] [2021-03-10 21:53:05,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:05,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:05,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:05,137 INFO L87 Difference]: Start difference. First operand 162 states and 358 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:05,472 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-03-10 21:53:05,858 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-10 21:53:06,154 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-03-10 21:53:06,383 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 21:53:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:06,398 INFO L93 Difference]: Finished difference Result 234 states and 475 transitions. [2021-03-10 21:53:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:53:06,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:06,399 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:53:06,399 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:53:06,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1500.4ms TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:53:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:53:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-03-10 21:53:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-03-10 21:53:06,401 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 18 [2021-03-10 21:53:06,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:06,401 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-03-10 21:53:06,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:06,401 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-03-10 21:53:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:06,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:06,402 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:06,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1536,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:06,602 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:06,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:06,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1796718858, now seen corresponding path program 201 times [2021-03-10 21:53:06,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:06,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499343602] [2021-03-10 21:53:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:06,884 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2021-03-10 21:53:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:06,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499343602] [2021-03-10 21:53:06,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720002574] [2021-03-10 21:53:06,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:06,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:53:06,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 21:53:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:07,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:07,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:07,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287621932] [2021-03-10 21:53:07,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:07,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:07,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:07,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:07,384 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:08,234 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 21:53:08,383 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-03-10 21:53:08,554 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-10 21:53:08,689 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 21:53:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:08,850 INFO L93 Difference]: Finished difference Result 249 states and 502 transitions. [2021-03-10 21:53:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:53:08,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:08,851 INFO L225 Difference]: With dead ends: 249 [2021-03-10 21:53:08,851 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:53:08,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1788.0ms TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:53:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:53:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 165. [2021-03-10 21:53:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2378048780487805) internal successors, (367), 164 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 367 transitions. [2021-03-10 21:53:08,853 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 367 transitions. Word has length 18 [2021-03-10 21:53:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:08,853 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 367 transitions. [2021-03-10 21:53:08,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 367 transitions. [2021-03-10 21:53:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:08,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:08,853 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:09,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1549,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:09,054 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:09,054 INFO L82 PathProgramCache]: Analyzing trace with hash -462127528, now seen corresponding path program 202 times [2021-03-10 21:53:09,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:09,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890523543] [2021-03-10 21:53:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:09,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890523543] [2021-03-10 21:53:09,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303636382] [2021-03-10 21:53:09,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:09,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:09,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:53:09,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:09,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:09,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:09,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199466999] [2021-03-10 21:53:09,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:09,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:09,685 INFO L87 Difference]: Start difference. First operand 165 states and 367 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:10,954 INFO L93 Difference]: Finished difference Result 236 states and 482 transitions. [2021-03-10 21:53:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:10,955 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:10,955 INFO L225 Difference]: With dead ends: 236 [2021-03-10 21:53:10,956 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 21:53:10,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1523.1ms TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:53:10,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 21:53:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2021-03-10 21:53:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.2363636363636363) internal successors, (369), 165 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 369 transitions. [2021-03-10 21:53:10,958 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 369 transitions. Word has length 18 [2021-03-10 21:53:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:10,958 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 369 transitions. [2021-03-10 21:53:10,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 369 transitions. [2021-03-10 21:53:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:10,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:10,958 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:11,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-03-10 21:53:11,159 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:11,159 INFO L82 PathProgramCache]: Analyzing trace with hash -999983106, now seen corresponding path program 203 times [2021-03-10 21:53:11,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:11,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24231188] [2021-03-10 21:53:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:11,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24231188] [2021-03-10 21:53:11,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528475785] [2021-03-10 21:53:11,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:11,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:53:11,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:11,776 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:53:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:11,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:11,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:11,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959956951] [2021-03-10 21:53:11,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:11,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:11,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:11,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:11,961 INFO L87 Difference]: Start difference. First operand 166 states and 369 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:12,342 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-10 21:53:13,121 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-03-10 21:53:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:13,197 INFO L93 Difference]: Finished difference Result 264 states and 531 transitions. [2021-03-10 21:53:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:53:13,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:13,198 INFO L225 Difference]: With dead ends: 264 [2021-03-10 21:53:13,198 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:53:13,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1495.8ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:53:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:53:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2021-03-10 21:53:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2395209580838324) internal successors, (374), 167 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) [2021-03-10 21:53:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 374 transitions. [2021-03-10 21:53:13,200 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 374 transitions. Word has length 18 [2021-03-10 21:53:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:13,200 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 374 transitions. [2021-03-10 21:53:13,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 374 transitions. [2021-03-10 21:53:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:13,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:13,201 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:13,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-03-10 21:53:13,401 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1015113500, now seen corresponding path program 204 times [2021-03-10 21:53:13,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:13,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127413332] [2021-03-10 21:53:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:13,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127413332] [2021-03-10 21:53:13,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738948858] [2021-03-10 21:53:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:13,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:53:13,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:14,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:14,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:14,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762076935] [2021-03-10 21:53:14,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:14,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:14,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:14,149 INFO L87 Difference]: Start difference. First operand 168 states and 374 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:14,923 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-03-10 21:53:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:15,289 INFO L93 Difference]: Finished difference Result 217 states and 458 transitions. [2021-03-10 21:53:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:15,290 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:53:15,290 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:53:15,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1412.2ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:53:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 171. [2021-03-10 21:53:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.235294117647059) internal successors, (380), 170 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 380 transitions. [2021-03-10 21:53:15,292 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 380 transitions. Word has length 18 [2021-03-10 21:53:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:15,292 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 380 transitions. [2021-03-10 21:53:15,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 380 transitions. [2021-03-10 21:53:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:15,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:15,292 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:15,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1586,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:15,492 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1945262466, now seen corresponding path program 205 times [2021-03-10 21:53:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:15,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691726008] [2021-03-10 21:53:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:15,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691726008] [2021-03-10 21:53:15,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86712147] [2021-03-10 21:53:15,697 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:53:15,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:16,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:16,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:16,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304608461] [2021-03-10 21:53:16,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:16,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:16,142 INFO L87 Difference]: Start difference. First operand 171 states and 380 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:17,116 INFO L93 Difference]: Finished difference Result 243 states and 499 transitions. [2021-03-10 21:53:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:53:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:17,117 INFO L225 Difference]: With dead ends: 243 [2021-03-10 21:53:17,117 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:53:17,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1164.7ms TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:53:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 170. [2021-03-10 21:53:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-03-10 21:53:17,119 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 18 [2021-03-10 21:53:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:17,119 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-03-10 21:53:17,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-03-10 21:53:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:17,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:17,119 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:17,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-03-10 21:53:17,331 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:17,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:17,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1811849252, now seen corresponding path program 206 times [2021-03-10 21:53:17,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:17,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120404951] [2021-03-10 21:53:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:17,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120404951] [2021-03-10 21:53:17,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518216511] [2021-03-10 21:53:17,530 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:17,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:17,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:17,907 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:53:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:18,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:18,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:18,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898413667] [2021-03-10 21:53:18,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:18,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:18,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:18,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:18,092 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:18,554 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 21:53:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:18,957 INFO L93 Difference]: Finished difference Result 233 states and 490 transitions. [2021-03-10 21:53:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:18,958 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:53:18,958 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:53:18,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1129.2ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:53:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 169. [2021-03-10 21:53:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.238095238095238) internal successors, (376), 168 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 376 transitions. [2021-03-10 21:53:18,960 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 376 transitions. Word has length 18 [2021-03-10 21:53:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:18,960 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 376 transitions. [2021-03-10 21:53:18,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 376 transitions. [2021-03-10 21:53:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:18,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:18,960 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:19,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1611 [2021-03-10 21:53:19,161 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:19,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1976771778, now seen corresponding path program 207 times [2021-03-10 21:53:19,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:19,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75359788] [2021-03-10 21:53:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:19,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75359788] [2021-03-10 21:53:19,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706342561] [2021-03-10 21:53:19,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:19,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:53:19,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:19,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:53:19,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:19,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:19,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:19,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163799552] [2021-03-10 21:53:19,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:19,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:19,790 INFO L87 Difference]: Start difference. First operand 169 states and 376 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:20,982 INFO L93 Difference]: Finished difference Result 246 states and 519 transitions. [2021-03-10 21:53:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:53:20,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:20,983 INFO L225 Difference]: With dead ends: 246 [2021-03-10 21:53:20,983 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 21:53:20,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1304.5ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:53:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 21:53:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 170. [2021-03-10 21:53:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.242603550295858) internal successors, (379), 169 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 379 transitions. [2021-03-10 21:53:20,986 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 379 transitions. Word has length 18 [2021-03-10 21:53:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:20,986 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 379 transitions. [2021-03-10 21:53:20,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 379 transitions. [2021-03-10 21:53:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:20,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:20,986 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:21,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1623,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:21,201 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:21,202 INFO L82 PathProgramCache]: Analyzing trace with hash -89256540, now seen corresponding path program 208 times [2021-03-10 21:53:21,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:21,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216623006] [2021-03-10 21:53:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216623006] [2021-03-10 21:53:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895639521] [2021-03-10 21:53:21,469 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:21,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:21,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:21,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:53:21,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:21,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:21,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:21,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790245818] [2021-03-10 21:53:21,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:21,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:21,951 INFO L87 Difference]: Start difference. First operand 170 states and 379 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:22,598 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-03-10 21:53:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:22,880 INFO L93 Difference]: Finished difference Result 188 states and 408 transitions. [2021-03-10 21:53:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:53:22,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:22,881 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:53:22,881 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 21:53:22,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1220.7ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:53:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 21:53:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 173. [2021-03-10 21:53:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.244186046511628) internal successors, (386), 172 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 386 transitions. [2021-03-10 21:53:22,883 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 386 transitions. Word has length 18 [2021-03-10 21:53:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:22,884 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 386 transitions. [2021-03-10 21:53:22,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 386 transitions. [2021-03-10 21:53:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:22,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:22,884 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:23,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1633 [2021-03-10 21:53:23,084 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1666598270, now seen corresponding path program 209 times [2021-03-10 21:53:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837410753] [2021-03-10 21:53:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:23,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837410753] [2021-03-10 21:53:23,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885827303] [2021-03-10 21:53:23,378 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:23,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:53:23,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:23,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:23,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:23,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392041995] [2021-03-10 21:53:23,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:23,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:23,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:23,938 INFO L87 Difference]: Start difference. First operand 173 states and 386 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:24,828 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-03-10 21:53:24,975 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-03-10 21:53:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:25,001 INFO L93 Difference]: Finished difference Result 211 states and 448 transitions. [2021-03-10 21:53:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:25,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:25,002 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:53:25,002 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 21:53:25,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1471.7ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:53:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 21:53:25,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 174. [2021-03-10 21:53:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-03-10 21:53:25,004 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 18 [2021-03-10 21:53:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:25,004 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-03-10 21:53:25,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-03-10 21:53:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:25,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:25,004 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:25,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1646 [2021-03-10 21:53:25,205 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash -332006940, now seen corresponding path program 210 times [2021-03-10 21:53:25,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:25,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675740309] [2021-03-10 21:53:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:25,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675740309] [2021-03-10 21:53:25,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231385608] [2021-03-10 21:53:25,407 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:25,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:53:25,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:25,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 21:53:25,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:25,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:25,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:25,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539080442] [2021-03-10 21:53:25,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:25,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:25,920 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:26,691 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 21:53:26,845 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-03-10 21:53:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:26,874 INFO L93 Difference]: Finished difference Result 259 states and 523 transitions. [2021-03-10 21:53:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:53:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:26,875 INFO L225 Difference]: With dead ends: 259 [2021-03-10 21:53:26,875 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:53:26,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1172.4ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:53:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:53:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 172. [2021-03-10 21:53:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.239766081871345) internal successors, (383), 171 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 383 transitions. [2021-03-10 21:53:26,877 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 383 transitions. Word has length 18 [2021-03-10 21:53:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:26,877 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 383 transitions. [2021-03-10 21:53:26,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 383 transitions. [2021-03-10 21:53:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:26,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:26,878 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:27,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1658,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:27,078 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash -953056767, now seen corresponding path program 211 times [2021-03-10 21:53:27,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:27,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55039244] [2021-03-10 21:53:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:53:27,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55039244] [2021-03-10 21:53:27,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674229209] [2021-03-10 21:53:27,217 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:27,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:53:27,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:53:27,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:27,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:53:27,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391899906] [2021-03-10 21:53:27,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:53:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:27,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:53:27,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:53:27,405 INFO L87 Difference]: Start difference. First operand 172 states and 383 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:27,585 INFO L93 Difference]: Finished difference Result 200 states and 439 transitions. [2021-03-10 21:53:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:53:27,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:27,586 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:53:27,586 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:53:27,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:53:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:53:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 172. [2021-03-10 21:53:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.239766081871345) internal successors, (383), 171 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 383 transitions. [2021-03-10 21:53:27,588 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 383 transitions. Word has length 18 [2021-03-10 21:53:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:27,588 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 383 transitions. [2021-03-10 21:53:27,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 383 transitions. [2021-03-10 21:53:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:27,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:27,589 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:27,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-03-10 21:53:27,789 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1160252004, now seen corresponding path program 212 times [2021-03-10 21:53:27,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:27,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467883981] [2021-03-10 21:53:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:28,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467883981] [2021-03-10 21:53:28,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599766309] [2021-03-10 21:53:28,050 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:28,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:28,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:53:28,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:28,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:28,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36403665] [2021-03-10 21:53:28,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:28,518 INFO L87 Difference]: Start difference. First operand 172 states and 383 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:29,147 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-10 21:53:29,312 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-03-10 21:53:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:29,733 INFO L93 Difference]: Finished difference Result 224 states and 465 transitions. [2021-03-10 21:53:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:29,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:29,734 INFO L225 Difference]: With dead ends: 224 [2021-03-10 21:53:29,734 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:53:29,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1490.3ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:53:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:53:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 174. [2021-03-10 21:53:29,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2427745664739884) internal successors, (388), 173 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 388 transitions. [2021-03-10 21:53:29,736 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 388 transitions. Word has length 18 [2021-03-10 21:53:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:29,736 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 388 transitions. [2021-03-10 21:53:29,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 388 transitions. [2021-03-10 21:53:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:29,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:29,737 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:29,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1676,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:29,937 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash 174339326, now seen corresponding path program 213 times [2021-03-10 21:53:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:29,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324259456] [2021-03-10 21:53:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:30,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324259456] [2021-03-10 21:53:30,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480471387] [2021-03-10 21:53:30,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:30,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:53:30,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:30,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:30,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:30,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:30,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976990697] [2021-03-10 21:53:30,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:30,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:30,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:30,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:30,622 INFO L87 Difference]: Start difference. First operand 174 states and 388 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:31,944 INFO L93 Difference]: Finished difference Result 262 states and 526 transitions. [2021-03-10 21:53:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:53:31,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:31,945 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:53:31,945 INFO L226 Difference]: Without dead ends: 239 [2021-03-10 21:53:31,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1411.1ms TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:53:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-03-10 21:53:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 173. [2021-03-10 21:53:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.238372093023256) internal successors, (385), 172 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 385 transitions. [2021-03-10 21:53:31,947 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 385 transitions. Word has length 18 [2021-03-10 21:53:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:31,947 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 385 transitions. [2021-03-10 21:53:31,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 385 transitions. [2021-03-10 21:53:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:31,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:31,947 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:32,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1688 [2021-03-10 21:53:32,148 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash -363516252, now seen corresponding path program 214 times [2021-03-10 21:53:32,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:32,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665976039] [2021-03-10 21:53:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:32,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665976039] [2021-03-10 21:53:32,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402807299] [2021-03-10 21:53:32,389 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:32,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:32,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:32,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:32,770 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:53:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:32,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:32,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714587657] [2021-03-10 21:53:32,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:32,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:32,957 INFO L87 Difference]: Start difference. First operand 173 states and 385 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:33,328 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 21:53:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:33,684 INFO L93 Difference]: Finished difference Result 241 states and 495 transitions. [2021-03-10 21:53:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:33,685 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:53:33,685 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:53:33,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1003.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:53:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:53:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 173. [2021-03-10 21:53:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.238372093023256) internal successors, (385), 172 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 385 transitions. [2021-03-10 21:53:33,687 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 385 transitions. Word has length 18 [2021-03-10 21:53:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:33,687 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 385 transitions. [2021-03-10 21:53:33,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 385 transitions. [2021-03-10 21:53:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:33,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:33,687 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:33,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:33,888 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:33,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1651580354, now seen corresponding path program 215 times [2021-03-10 21:53:33,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:33,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703370866] [2021-03-10 21:53:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703370866] [2021-03-10 21:53:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661915366] [2021-03-10 21:53:34,158 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:34,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:53:34,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:53:34,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:34,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:34,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221436101] [2021-03-10 21:53:34,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:34,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:34,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:34,623 INFO L87 Difference]: Start difference. First operand 173 states and 385 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:35,193 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-03-10 21:53:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:36,174 INFO L93 Difference]: Finished difference Result 239 states and 492 transitions. [2021-03-10 21:53:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:53:36,174 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:36,175 INFO L225 Difference]: With dead ends: 239 [2021-03-10 21:53:36,175 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:53:36,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1735.2ms TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:53:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:53:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-03-10 21:53:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-03-10 21:53:36,177 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 18 [2021-03-10 21:53:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:36,177 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-03-10 21:53:36,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-03-10 21:53:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:36,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:36,177 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:36,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1712 [2021-03-10 21:53:36,378 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1846651190, now seen corresponding path program 216 times [2021-03-10 21:53:36,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:36,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505021203] [2021-03-10 21:53:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:36,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505021203] [2021-03-10 21:53:36,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995715468] [2021-03-10 21:53:36,592 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:36,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:53:36,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:36,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:36,978 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:53:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:37,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:37,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:37,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390277759] [2021-03-10 21:53:37,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:37,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:37,171 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:37,712 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 21:53:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:38,037 INFO L93 Difference]: Finished difference Result 248 states and 508 transitions. [2021-03-10 21:53:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:53:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:38,038 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:53:38,038 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:53:38,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1231.4ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:53:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 176. [2021-03-10 21:53:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-03-10 21:53:38,040 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 18 [2021-03-10 21:53:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:38,040 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-03-10 21:53:38,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-03-10 21:53:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:38,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:38,041 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:38,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1725 [2021-03-10 21:53:38,241 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:38,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1340304924, now seen corresponding path program 217 times [2021-03-10 21:53:38,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:38,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024742500] [2021-03-10 21:53:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:38,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024742500] [2021-03-10 21:53:38,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027410844] [2021-03-10 21:53:38,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:53:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:38,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:38,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:38,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856356586] [2021-03-10 21:53:38,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:38,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:38,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:38,981 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:39,840 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-03-10 21:53:40,078 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-03-10 21:53:40,228 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2021-03-10 21:53:40,372 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-10 21:53:40,727 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-10 21:53:41,063 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-03-10 21:53:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:41,193 INFO L93 Difference]: Finished difference Result 242 states and 511 transitions. [2021-03-10 21:53:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:53:41,194 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:41,194 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:53:41,194 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:53:41,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2360.2ms TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:53:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:53:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 179. [2021-03-10 21:53:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 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) [2021-03-10 21:53:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-03-10 21:53:41,196 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 18 [2021-03-10 21:53:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:41,196 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-03-10 21:53:41,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-03-10 21:53:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:41,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:41,197 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:41,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1737,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:41,397 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:41,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1375929764, now seen corresponding path program 218 times [2021-03-10 21:53:41,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:41,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018444218] [2021-03-10 21:53:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:41,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018444218] [2021-03-10 21:53:41,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380357356] [2021-03-10 21:53:41,677 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:41,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:41,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:53:41,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:42,335 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 21:53:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:42,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:42,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:53:42,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786622705] [2021-03-10 21:53:42,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:53:42,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:53:42,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:53:42,454 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:43,213 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-10 21:53:43,419 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-10 21:53:43,646 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-03-10 21:53:43,894 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-03-10 21:53:44,061 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-03-10 21:53:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:44,943 INFO L93 Difference]: Finished difference Result 246 states and 508 transitions. [2021-03-10 21:53:44,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:53:44,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:53:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:44,944 INFO L225 Difference]: With dead ends: 246 [2021-03-10 21:53:44,944 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:53:44,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2943.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:53:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:53:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 180. [2021-03-10 21:53:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2458100558659218) internal successors, (402), 179 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 402 transitions. [2021-03-10 21:53:44,946 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 402 transitions. Word has length 18 [2021-03-10 21:53:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:44,946 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 402 transitions. [2021-03-10 21:53:44,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 402 transitions. [2021-03-10 21:53:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:44,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:44,947 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:45,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1747 [2021-03-10 21:53:45,147 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:45,148 INFO L82 PathProgramCache]: Analyzing trace with hash -579194012, now seen corresponding path program 219 times [2021-03-10 21:53:45,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:45,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125337891] [2021-03-10 21:53:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125337891] [2021-03-10 21:53:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426821481] [2021-03-10 21:53:45,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:45,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:53:45,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:45,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 21:53:45,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:45,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:45,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:53:45,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715220781] [2021-03-10 21:53:45,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:53:45,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:53:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:53:45,881 INFO L87 Difference]: Start difference. First operand 180 states and 402 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:47,069 INFO L93 Difference]: Finished difference Result 251 states and 517 transitions. [2021-03-10 21:53:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:53:47,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:53:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:47,070 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:53:47,070 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:53:47,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1445.3ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:53:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:53:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 182. [2021-03-10 21:53:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-03-10 21:53:47,072 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 18 [2021-03-10 21:53:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:47,072 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-03-10 21:53:47,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-03-10 21:53:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:47,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:47,073 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:47,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1758,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:47,288 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:47,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash -72847746, now seen corresponding path program 220 times [2021-03-10 21:53:47,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:47,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185113769] [2021-03-10 21:53:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:47,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185113769] [2021-03-10 21:53:47,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010718724] [2021-03-10 21:53:47,575 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:47,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:47,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:47,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:53:47,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:48,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:48,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:53:48,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469204105] [2021-03-10 21:53:48,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:53:48,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:53:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:53:48,044 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:49,367 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-03-10 21:53:49,749 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-03-10 21:53:50,092 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-03-10 21:53:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:50,349 INFO L93 Difference]: Finished difference Result 277 states and 562 transitions. [2021-03-10 21:53:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:53:50,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:53:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:50,350 INFO L225 Difference]: With dead ends: 277 [2021-03-10 21:53:50,350 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:53:50,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2446.2ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:53:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:53:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 182. [2021-03-10 21:53:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-03-10 21:53:50,353 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 18 [2021-03-10 21:53:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:50,353 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-03-10 21:53:50,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-03-10 21:53:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:50,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:50,353 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:50,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1769,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:50,559 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:50,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1555982684, now seen corresponding path program 221 times [2021-03-10 21:53:50,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:50,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792831136] [2021-03-10 21:53:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:50,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792831136] [2021-03-10 21:53:50,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604586018] [2021-03-10 21:53:50,783 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:50,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:53:50,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:50,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:50,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:51,092 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 21:53:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:51,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:51,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:53:51,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939013970] [2021-03-10 21:53:51,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:53:51,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:53:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:53:51,460 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:51,927 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 21:53:52,237 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 21:53:52,616 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2021-03-10 21:53:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:52,869 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-03-10 21:53:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:53:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:53:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:52,870 INFO L225 Difference]: With dead ends: 266 [2021-03-10 21:53:52,870 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:53:52,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1798.0ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:53:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:53:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 182. [2021-03-10 21:53:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-03-10 21:53:52,872 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 18 [2021-03-10 21:53:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:52,872 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-03-10 21:53:52,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-03-10 21:53:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:52,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:52,873 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:53,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1779 [2021-03-10 21:53:53,088 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash 179489888, now seen corresponding path program 222 times [2021-03-10 21:53:53,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:53,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230285309] [2021-03-10 21:53:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:53,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230285309] [2021-03-10 21:53:53,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715673489] [2021-03-10 21:53:53,383 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:53,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:53:53,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:53,701 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:53:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:53,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:53,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:53,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556921931] [2021-03-10 21:53:53,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:53,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:53,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:53,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:53,944 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:54,388 INFO L93 Difference]: Finished difference Result 200 states and 432 transitions. [2021-03-10 21:53:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:53:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:54,389 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:53:54,390 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 21:53:54,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 935.6ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:53:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 21:53:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-03-10 21:53:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.241758241758242) internal successors, (408), 182 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 408 transitions. [2021-03-10 21:53:54,392 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 408 transitions. Word has length 18 [2021-03-10 21:53:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:54,392 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 408 transitions. [2021-03-10 21:53:54,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 408 transitions. [2021-03-10 21:53:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:54,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:54,392 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:54,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1791,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:54,593 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1397851842, now seen corresponding path program 223 times [2021-03-10 21:53:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:54,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217726608] [2021-03-10 21:53:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:54,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217726608] [2021-03-10 21:53:54,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935201731] [2021-03-10 21:53:54,840 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:55,150 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:53:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:55,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:55,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:55,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664658555] [2021-03-10 21:53:55,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:55,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:55,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:55,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:55,411 INFO L87 Difference]: Start difference. First operand 183 states and 408 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:56,013 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 21:53:56,249 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 21:53:56,374 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-03-10 21:53:56,528 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-03-10 21:53:56,748 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 21:53:56,882 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 21:53:56,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:56,904 INFO L93 Difference]: Finished difference Result 261 states and 530 transitions. [2021-03-10 21:53:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:53:56,905 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:56,906 INFO L225 Difference]: With dead ends: 261 [2021-03-10 21:53:56,906 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:53:56,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1833.7ms TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:53:56,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:53:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 188. [2021-03-10 21:53:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2459893048128343) internal successors, (420), 187 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 420 transitions. [2021-03-10 21:53:56,908 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 420 transitions. Word has length 18 [2021-03-10 21:53:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:56,908 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 420 transitions. [2021-03-10 21:53:56,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 420 transitions. [2021-03-10 21:53:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:56,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:56,908 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:57,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1803 [2021-03-10 21:53:57,109 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash -684310339, now seen corresponding path program 224 times [2021-03-10 21:53:57,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:57,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630992069] [2021-03-10 21:53:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:53:57,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630992069] [2021-03-10 21:53:57,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574443583] [2021-03-10 21:53:57,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:57,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:57,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:53:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:53:57,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:57,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:53:57,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016993697] [2021-03-10 21:53:57,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:53:57,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:53:57,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:53:57,439 INFO L87 Difference]: Start difference. First operand 188 states and 420 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:57,799 INFO L93 Difference]: Finished difference Result 215 states and 473 transitions. [2021-03-10 21:53:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:53:57,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:57,800 INFO L225 Difference]: With dead ends: 215 [2021-03-10 21:53:57,800 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:53:57,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:53:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:53:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 187. [2021-03-10 21:53:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.247311827956989) internal successors, (418), 186 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 418 transitions. [2021-03-10 21:53:57,802 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 418 transitions. Word has length 18 [2021-03-10 21:53:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:57,802 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 418 transitions. [2021-03-10 21:53:57,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 418 transitions. [2021-03-10 21:53:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:57,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:57,803 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:58,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:58,003 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash -891505576, now seen corresponding path program 225 times [2021-03-10 21:53:58,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:58,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031094809] [2021-03-10 21:53:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:58,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031094809] [2021-03-10 21:53:58,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823891132] [2021-03-10 21:53:58,237 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:58,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:53:58,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:53:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:58,588 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:53:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:58,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:58,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:53:58,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242948173] [2021-03-10 21:53:58,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:53:58,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:53:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:58,767 INFO L87 Difference]: Start difference. First operand 187 states and 418 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:59,778 INFO L93 Difference]: Finished difference Result 243 states and 514 transitions. [2021-03-10 21:53:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:53:59,779 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:53:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:59,779 INFO L225 Difference]: With dead ends: 243 [2021-03-10 21:53:59,779 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:53:59,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1316.6ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:53:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:53:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2021-03-10 21:53:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2459893048128343) internal successors, (420), 187 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 420 transitions. [2021-03-10 21:53:59,781 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 420 transitions. Word has length 18 [2021-03-10 21:53:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:59,782 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 420 transitions. [2021-03-10 21:53:59,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 420 transitions. [2021-03-10 21:53:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:53:59,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:59,782 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:59,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1820 [2021-03-10 21:53:59,982 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash -94769824, now seen corresponding path program 226 times [2021-03-10 21:53:59,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:59,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913348074] [2021-03-10 21:53:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:00,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913348074] [2021-03-10 21:54:00,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139116933] [2021-03-10 21:54:00,245 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:00,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:00,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:54:00,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:00,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:00,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:54:00,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601009672] [2021-03-10 21:54:00,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:54:00,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:00,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:54:00,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:00,672 INFO L87 Difference]: Start difference. First operand 188 states and 420 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:01,024 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-10 21:54:01,270 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-10 21:54:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:01,626 INFO L93 Difference]: Finished difference Result 253 states and 535 transitions. [2021-03-10 21:54:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:01,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:54:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:01,628 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:54:01,628 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:54:01,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1073.9ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:54:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:54:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 188. [2021-03-10 21:54:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2459893048128343) internal successors, (420), 187 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 420 transitions. [2021-03-10 21:54:01,630 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 420 transitions. Word has length 18 [2021-03-10 21:54:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:01,630 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 420 transitions. [2021-03-10 21:54:01,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 420 transitions. [2021-03-10 21:54:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:01,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:01,630 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:01,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1832,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:01,831 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:01,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1920326782, now seen corresponding path program 227 times [2021-03-10 21:54:01,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:01,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789663836] [2021-03-10 21:54:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:02,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789663836] [2021-03-10 21:54:02,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710035824] [2021-03-10 21:54:02,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:02,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:02,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:54:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:02,644 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 21:54:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:02,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:02,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:54:02,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100298206] [2021-03-10 21:54:02,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:54:02,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:54:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:02,760 INFO L87 Difference]: Start difference. First operand 188 states and 420 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:03,126 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 21:54:03,329 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 21:54:03,575 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-10 21:54:03,722 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-03-10 21:54:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:04,216 INFO L93 Difference]: Finished difference Result 244 states and 510 transitions. [2021-03-10 21:54:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:54:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:54:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:04,217 INFO L225 Difference]: With dead ends: 244 [2021-03-10 21:54:04,217 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:54:04,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1874.5ms TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:54:04,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:54:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 188. [2021-03-10 21:54:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2459893048128343) internal successors, (420), 187 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 420 transitions. [2021-03-10 21:54:04,219 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 420 transitions. Word has length 18 [2021-03-10 21:54:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:04,219 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 420 transitions. [2021-03-10 21:54:04,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 420 transitions. [2021-03-10 21:54:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:04,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:04,220 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:04,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1842,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:04,420 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1577904762, now seen corresponding path program 228 times [2021-03-10 21:54:04,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:04,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634297292] [2021-03-10 21:54:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634297292] [2021-03-10 21:54:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924158928] [2021-03-10 21:54:04,658 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:04,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:54:04,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:54:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:05,076 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:54:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:05,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:05,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:54:05,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54677752] [2021-03-10 21:54:05,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:54:05,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:05,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:54:05,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:05,277 INFO L87 Difference]: Start difference. First operand 188 states and 420 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:06,065 INFO L93 Difference]: Finished difference Result 247 states and 519 transitions. [2021-03-10 21:54:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:06,065 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:54:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:06,066 INFO L225 Difference]: With dead ends: 247 [2021-03-10 21:54:06,066 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:54:06,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1166.5ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:54:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:54:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 187. [2021-03-10 21:54:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.247311827956989) internal successors, (418), 186 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 418 transitions. [2021-03-10 21:54:06,068 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 418 transitions. Word has length 18 [2021-03-10 21:54:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:06,068 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 418 transitions. [2021-03-10 21:54:06,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 418 transitions. [2021-03-10 21:54:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:06,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:06,069 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:06,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1854 [2021-03-10 21:54:06,269 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1071558496, now seen corresponding path program 229 times [2021-03-10 21:54:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:06,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054242533] [2021-03-10 21:54:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:06,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054242533] [2021-03-10 21:54:06,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700886741] [2021-03-10 21:54:06,561 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:06,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:54:06,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:06,938 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:54:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:07,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:07,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:54:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997655925] [2021-03-10 21:54:07,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:54:07,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:54:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:07,219 INFO L87 Difference]: Start difference. First operand 187 states and 418 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:07,658 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-10 21:54:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:08,293 INFO L93 Difference]: Finished difference Result 257 states and 543 transitions. [2021-03-10 21:54:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:54:08,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:54:08,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:08,295 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:54:08,295 INFO L226 Difference]: Without dead ends: 238 [2021-03-10 21:54:08,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1451.9ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:54:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-03-10 21:54:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 187. [2021-03-10 21:54:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.247311827956989) internal successors, (418), 186 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 418 transitions. [2021-03-10 21:54:08,297 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 418 transitions. Word has length 18 [2021-03-10 21:54:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:08,297 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 418 transitions. [2021-03-10 21:54:08,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 418 transitions. [2021-03-10 21:54:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:08,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:08,297 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:08,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1866 [2021-03-10 21:54:08,498 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:08,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1107183336, now seen corresponding path program 230 times [2021-03-10 21:54:08,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:08,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662853946] [2021-03-10 21:54:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:08,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662853946] [2021-03-10 21:54:08,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709368475] [2021-03-10 21:54:08,786 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:08,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:54:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:09,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:09,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:54:09,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357865703] [2021-03-10 21:54:09,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:54:09,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:09,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:54:09,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:09,305 INFO L87 Difference]: Start difference. First operand 187 states and 418 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:10,242 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-03-10 21:54:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:10,856 INFO L93 Difference]: Finished difference Result 251 states and 520 transitions. [2021-03-10 21:54:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:54:10,856 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:54:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:10,857 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:54:10,857 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 21:54:10,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1799.6ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:54:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 21:54:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-03-10 21:54:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.2473684210526317) internal successors, (427), 190 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 427 transitions. [2021-03-10 21:54:10,859 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 427 transitions. Word has length 18 [2021-03-10 21:54:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:10,859 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 427 transitions. [2021-03-10 21:54:10,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 427 transitions. [2021-03-10 21:54:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:10,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:10,859 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:11,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1878 [2021-03-10 21:54:11,060 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash -310447584, now seen corresponding path program 231 times [2021-03-10 21:54:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:11,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420919035] [2021-03-10 21:54:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420919035] [2021-03-10 21:54:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367737492] [2021-03-10 21:54:11,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:11,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:54:11,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 21:54:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:11,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:11,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:54:11,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628520251] [2021-03-10 21:54:11,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:54:11,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:54:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:11,791 INFO L87 Difference]: Start difference. First operand 191 states and 427 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:12,637 INFO L93 Difference]: Finished difference Result 251 states and 528 transitions. [2021-03-10 21:54:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:54:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:54:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:12,638 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:54:12,638 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:54:12,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1087.5ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:54:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:54:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 191. [2021-03-10 21:54:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.2473684210526317) internal successors, (427), 190 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 427 transitions. [2021-03-10 21:54:12,640 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 427 transitions. Word has length 18 [2021-03-10 21:54:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:12,640 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 427 transitions. [2021-03-10 21:54:12,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 427 transitions. [2021-03-10 21:54:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:12,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:12,641 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:12,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1890,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:12,855 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash 195898682, now seen corresponding path program 232 times [2021-03-10 21:54:12,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:12,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940721523] [2021-03-10 21:54:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:13,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940721523] [2021-03-10 21:54:13,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157462773] [2021-03-10 21:54:13,063 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:13,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:13,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:54:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:13,454 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:54:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:13,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:13,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:54:13,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42224175] [2021-03-10 21:54:13,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:54:13,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:13,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:54:13,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:13,737 INFO L87 Difference]: Start difference. First operand 191 states and 427 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:14,375 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 21:54:14,604 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:54:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:15,082 INFO L93 Difference]: Finished difference Result 260 states and 550 transitions. [2021-03-10 21:54:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:54:15,083 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:54:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:15,084 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:54:15,084 INFO L226 Difference]: Without dead ends: 241 [2021-03-10 21:54:15,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1663.0ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:54:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-03-10 21:54:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 191. [2021-03-10 21:54:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.2473684210526317) internal successors, (427), 190 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 427 transitions. [2021-03-10 21:54:15,086 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 427 transitions. Word has length 18 [2021-03-10 21:54:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:15,086 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 427 transitions. [2021-03-10 21:54:15,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 427 transitions. [2021-03-10 21:54:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:15,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:15,087 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:15,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1901 [2021-03-10 21:54:15,287 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:15,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1287236256, now seen corresponding path program 233 times [2021-03-10 21:54:15,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:15,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228396838] [2021-03-10 21:54:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:15,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228396838] [2021-03-10 21:54:15,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535703763] [2021-03-10 21:54:15,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:15,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:15,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:15,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:54:15,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:15,852 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 21:54:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:16,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:16,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:54:16,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995217940] [2021-03-10 21:54:16,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:54:16,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:54:16,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:16,243 INFO L87 Difference]: Start difference. First operand 191 states and 427 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:16,726 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 21:54:16,977 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 21:54:17,174 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:54:17,335 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:54:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:17,772 INFO L93 Difference]: Finished difference Result 264 states and 558 transitions. [2021-03-10 21:54:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:54:17,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:54:17,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:17,773 INFO L225 Difference]: With dead ends: 264 [2021-03-10 21:54:17,773 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 21:54:17,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1870.7ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:54:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 21:54:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 195. [2021-03-10 21:54:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.2422680412371134) internal successors, (435), 194 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 435 transitions. [2021-03-10 21:54:17,776 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 435 transitions. Word has length 18 [2021-03-10 21:54:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:17,776 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 435 transitions. [2021-03-10 21:54:17,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 435 transitions. [2021-03-10 21:54:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:17,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:17,776 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:17,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1912,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:17,976 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash -682872100, now seen corresponding path program 234 times [2021-03-10 21:54:17,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:17,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636568082] [2021-03-10 21:54:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636568082] [2021-03-10 21:54:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135577451] [2021-03-10 21:54:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:18,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:54:18,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 21:54:18,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:18,667 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:54:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:18,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:18,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:54:18,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453044108] [2021-03-10 21:54:18,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:54:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:18,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:54:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:18,861 INFO L87 Difference]: Start difference. First operand 195 states and 435 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:19,235 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 21:54:19,989 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 21:54:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:20,711 INFO L93 Difference]: Finished difference Result 287 states and 589 transitions. [2021-03-10 21:54:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:54:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:54:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:20,713 INFO L225 Difference]: With dead ends: 287 [2021-03-10 21:54:20,713 INFO L226 Difference]: Without dead ends: 258 [2021-03-10 21:54:20,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2132.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:54:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-03-10 21:54:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 193. [2021-03-10 21:54:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2395833333333335) internal successors, (430), 192 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 430 transitions. [2021-03-10 21:54:20,715 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 430 transitions. Word has length 18 [2021-03-10 21:54:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:20,715 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 430 transitions. [2021-03-10 21:54:20,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 430 transitions. [2021-03-10 21:54:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:20,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:20,716 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:20,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1924 [2021-03-10 21:54:20,916 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:20,916 INFO L82 PathProgramCache]: Analyzing trace with hash 113863652, now seen corresponding path program 235 times [2021-03-10 21:54:20,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:20,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817921095] [2021-03-10 21:54:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:21,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817921095] [2021-03-10 21:54:21,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029778482] [2021-03-10 21:54:21,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:54:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:21,612 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:54:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:21,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:21,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:54:21,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144679835] [2021-03-10 21:54:21,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:54:21,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:21,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:54:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:21,829 INFO L87 Difference]: Start difference. First operand 193 states and 430 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:24,186 INFO L93 Difference]: Finished difference Result 318 states and 647 transitions. [2021-03-10 21:54:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:54:24,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:54:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:24,187 INFO L225 Difference]: With dead ends: 318 [2021-03-10 21:54:24,187 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:54:24,187 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2583.1ms TimeCoverageRelationStatistics Valid=308, Invalid=1762, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:54:24,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:54:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 197. [2021-03-10 21:54:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2346938775510203) internal successors, (438), 196 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 438 transitions. [2021-03-10 21:54:24,190 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 438 transitions. Word has length 18 [2021-03-10 21:54:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:24,190 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 438 transitions. [2021-03-10 21:54:24,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 438 transitions. [2021-03-10 21:54:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:24,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:24,190 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:24,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1936,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:24,391 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:24,391 INFO L82 PathProgramCache]: Analyzing trace with hash 620209918, now seen corresponding path program 236 times [2021-03-10 21:54:24,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:24,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513659124] [2021-03-10 21:54:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:24,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513659124] [2021-03-10 21:54:24,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266685135] [2021-03-10 21:54:24,696 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:24,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:24,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:54:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:25,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:25,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:54:25,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061860492] [2021-03-10 21:54:25,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:54:25,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:25,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:54:25,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:25,251 INFO L87 Difference]: Start difference. First operand 197 states and 438 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:26,491 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-10 21:54:26,968 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-03-10 21:54:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:27,334 INFO L93 Difference]: Finished difference Result 298 states and 628 transitions. [2021-03-10 21:54:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:54:27,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:54:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:27,335 INFO L225 Difference]: With dead ends: 298 [2021-03-10 21:54:27,335 INFO L226 Difference]: Without dead ends: 266 [2021-03-10 21:54:27,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2372.7ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:54:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-03-10 21:54:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 200. [2021-03-10 21:54:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2311557788944723) internal successors, (444), 199 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 444 transitions. [2021-03-10 21:54:27,338 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 444 transitions. Word has length 18 [2021-03-10 21:54:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:27,338 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 444 transitions. [2021-03-10 21:54:27,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 444 transitions. [2021-03-10 21:54:27,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:27,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:27,338 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:27,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1947,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:27,538 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash -862925020, now seen corresponding path program 237 times [2021-03-10 21:54:27,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:27,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991093410] [2021-03-10 21:54:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:27,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991093410] [2021-03-10 21:54:27,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093819520] [2021-03-10 21:54:27,775 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:27,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:54:27,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:27,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 21:54:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:28,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:28,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 21:54:28,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210108534] [2021-03-10 21:54:28,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:54:28,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:54:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:28,400 INFO L87 Difference]: Start difference. First operand 200 states and 444 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:28,993 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 21:54:29,152 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-03-10 21:54:29,892 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2021-03-10 21:54:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:30,117 INFO L93 Difference]: Finished difference Result 308 states and 631 transitions. [2021-03-10 21:54:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:54:30,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 18 [2021-03-10 21:54:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:30,118 INFO L225 Difference]: With dead ends: 308 [2021-03-10 21:54:30,118 INFO L226 Difference]: Without dead ends: 270 [2021-03-10 21:54:30,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1943.3ms TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:54:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-03-10 21:54:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 200. [2021-03-10 21:54:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2311557788944723) internal successors, (444), 199 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 444 transitions. [2021-03-10 21:54:30,135 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 444 transitions. Word has length 18 [2021-03-10 21:54:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:30,135 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 444 transitions. [2021-03-10 21:54:30,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 444 transitions. [2021-03-10 21:54:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:54:30,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:30,136 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:30,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1957,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:30,351 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:30,351 INFO L82 PathProgramCache]: Analyzing trace with hash -17953568, now seen corresponding path program 238 times [2021-03-10 21:54:30,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:30,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601436246] [2021-03-10 21:54:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:30,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601436246] [2021-03-10 21:54:30,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28190043] [2021-03-10 21:54:30,757 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:30,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:30,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 21:54:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:31,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:31,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:54:31,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409433946] [2021-03-10 21:54:31,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:54:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:54:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:31,296 INFO L87 Difference]: Start difference. First operand 200 states and 444 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:31,867 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-03-10 21:54:32,174 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-03-10 21:54:32,324 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2021-03-10 21:54:32,623 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 21:54:32,770 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2021-03-10 21:54:33,098 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2021-03-10 21:54:33,273 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-03-10 21:54:33,561 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-03-10 21:54:33,740 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-03-10 21:54:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:33,741 INFO L93 Difference]: Finished difference Result 322 states and 666 transitions. [2021-03-10 21:54:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:54:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:54:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:33,742 INFO L225 Difference]: With dead ends: 322 [2021-03-10 21:54:33,742 INFO L226 Difference]: Without dead ends: 289 [2021-03-10 21:54:33,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2752.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:54:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-03-10 21:54:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 202. [2021-03-10 21:54:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.228855721393035) internal successors, (448), 201 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 448 transitions. [2021-03-10 21:54:33,745 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 448 transitions. Word has length 18 [2021-03-10 21:54:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:33,745 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 448 transitions. [2021-03-10 21:54:33,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 448 transitions. [2021-03-10 21:54:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:33,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:33,745 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:33,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:33,945 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1401880791, now seen corresponding path program 239 times [2021-03-10 21:54:33,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:33,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376816243] [2021-03-10 21:54:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:34,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376816243] [2021-03-10 21:54:34,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120566276] [2021-03-10 21:54:34,077 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:34,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:54:34,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:54:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:34,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:34,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:54:34,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063774262] [2021-03-10 21:54:34,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:54:34,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:34,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:54:34,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:54:34,320 INFO L87 Difference]: Start difference. First operand 202 states and 448 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:34,593 INFO L93 Difference]: Finished difference Result 262 states and 559 transitions. [2021-03-10 21:54:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:54:34,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:34,595 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:54:34,595 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 21:54:34,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 21:54:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 205. [2021-03-10 21:54:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2254901960784315) internal successors, (454), 204 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 454 transitions. [2021-03-10 21:54:34,597 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 454 transitions. Word has length 19 [2021-03-10 21:54:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:34,597 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 454 transitions. [2021-03-10 21:54:34,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 454 transitions. [2021-03-10 21:54:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:34,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:34,598 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:34,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1977 [2021-03-10 21:54:34,798 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash 357408349, now seen corresponding path program 240 times [2021-03-10 21:54:34,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:34,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386432251] [2021-03-10 21:54:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:34,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386432251] [2021-03-10 21:54:34,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546026922] [2021-03-10 21:54:34,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:34,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:54:34,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:34,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:54:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:35,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:35,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:35,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033989836] [2021-03-10 21:54:35,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:35,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:35,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:35,342 INFO L87 Difference]: Start difference. First operand 205 states and 454 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:35,988 INFO L93 Difference]: Finished difference Result 287 states and 609 transitions. [2021-03-10 21:54:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:54:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:54:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:35,989 INFO L225 Difference]: With dead ends: 287 [2021-03-10 21:54:35,990 INFO L226 Difference]: Without dead ends: 287 [2021-03-10 21:54:35,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:54:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-03-10 21:54:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 205. [2021-03-10 21:54:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2254901960784315) internal successors, (454), 204 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 454 transitions. [2021-03-10 21:54:35,992 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 454 transitions. Word has length 19 [2021-03-10 21:54:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:35,992 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 454 transitions. [2021-03-10 21:54:35,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 454 transitions. [2021-03-10 21:54:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:35,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:35,993 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:36,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1982 [2021-03-10 21:54:36,193 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1516287333, now seen corresponding path program 241 times [2021-03-10 21:54:36,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:36,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428918259] [2021-03-10 21:54:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:36,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428918259] [2021-03-10 21:54:36,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157602407] [2021-03-10 21:54:36,350 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:36,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:36,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:36,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:36,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114373094] [2021-03-10 21:54:36,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:36,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:36,668 INFO L87 Difference]: Start difference. First operand 205 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:37,060 INFO L93 Difference]: Finished difference Result 274 states and 583 transitions. [2021-03-10 21:54:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:54:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:37,062 INFO L225 Difference]: With dead ends: 274 [2021-03-10 21:54:37,062 INFO L226 Difference]: Without dead ends: 274 [2021-03-10 21:54:37,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 503.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-03-10 21:54:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 205. [2021-03-10 21:54:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2254901960784315) internal successors, (454), 204 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 454 transitions. [2021-03-10 21:54:37,064 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 454 transitions. Word has length 19 [2021-03-10 21:54:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:37,064 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 454 transitions. [2021-03-10 21:54:37,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 454 transitions. [2021-03-10 21:54:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:37,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:37,065 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:37,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1986,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:37,265 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash -29839808, now seen corresponding path program 242 times [2021-03-10 21:54:37,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:37,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740763974] [2021-03-10 21:54:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:37,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740763974] [2021-03-10 21:54:37,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349183411] [2021-03-10 21:54:37,400 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:37,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:37,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:54:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:37,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:37,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:37,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467727243] [2021-03-10 21:54:37,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:37,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:37,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:37,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:37,960 INFO L87 Difference]: Start difference. First operand 205 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:38,151 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 21:54:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:38,636 INFO L93 Difference]: Finished difference Result 257 states and 545 transitions. [2021-03-10 21:54:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:54:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:38,638 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:54:38,638 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:54:38,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1008.1ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:54:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 205. [2021-03-10 21:54:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2205882352941178) internal successors, (453), 204 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 453 transitions. [2021-03-10 21:54:38,640 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 453 transitions. Word has length 19 [2021-03-10 21:54:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:38,640 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 453 transitions. [2021-03-10 21:54:38,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 453 transitions. [2021-03-10 21:54:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:38,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:38,641 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:38,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1991 [2021-03-10 21:54:38,841 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:38,841 INFO L82 PathProgramCache]: Analyzing trace with hash 445291869, now seen corresponding path program 243 times [2021-03-10 21:54:38,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:38,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344263946] [2021-03-10 21:54:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:38,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344263946] [2021-03-10 21:54:38,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760133302] [2021-03-10 21:54:38,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:39,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:54:39,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:54:39,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:39,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:39,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:39,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708155844] [2021-03-10 21:54:39,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:39,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:39,407 INFO L87 Difference]: Start difference. First operand 205 states and 453 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:39,801 INFO L93 Difference]: Finished difference Result 271 states and 576 transitions. [2021-03-10 21:54:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:54:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:39,802 INFO L225 Difference]: With dead ends: 271 [2021-03-10 21:54:39,802 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:54:39,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:54:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 205. [2021-03-10 21:54:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2205882352941178) internal successors, (453), 204 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 453 transitions. [2021-03-10 21:54:39,805 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 453 transitions. Word has length 19 [2021-03-10 21:54:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:39,805 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 453 transitions. [2021-03-10 21:54:39,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 453 transitions. [2021-03-10 21:54:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:39,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:39,806 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:40,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1998,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:40,006 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:40,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1682793182, now seen corresponding path program 244 times [2021-03-10 21:54:40,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:40,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512176684] [2021-03-10 21:54:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:40,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512176684] [2021-03-10 21:54:40,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774699471] [2021-03-10 21:54:40,153 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:40,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:40,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:40,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:40,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:40,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:40,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958310238] [2021-03-10 21:54:40,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:40,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:40,588 INFO L87 Difference]: Start difference. First operand 205 states and 453 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:41,098 INFO L93 Difference]: Finished difference Result 286 states and 589 transitions. [2021-03-10 21:54:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:54:41,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:41,100 INFO L225 Difference]: With dead ends: 286 [2021-03-10 21:54:41,100 INFO L226 Difference]: Without dead ends: 282 [2021-03-10 21:54:41,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 740.9ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:54:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-03-10 21:54:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 211. [2021-03-10 21:54:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2285714285714286) internal successors, (468), 210 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 468 transitions. [2021-03-10 21:54:41,102 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 468 transitions. Word has length 19 [2021-03-10 21:54:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:41,102 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 468 transitions. [2021-03-10 21:54:41,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 468 transitions. [2021-03-10 21:54:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:41,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:41,103 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:41,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-03-10 21:54:41,307 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:41,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:41,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1242027621, now seen corresponding path program 245 times [2021-03-10 21:54:41,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:41,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281964045] [2021-03-10 21:54:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:41,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281964045] [2021-03-10 21:54:41,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717640426] [2021-03-10 21:54:41,450 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:41,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:41,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:41,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:41,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:41,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:41,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018725526] [2021-03-10 21:54:41,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:41,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:41,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:41,782 INFO L87 Difference]: Start difference. First operand 211 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:42,293 INFO L93 Difference]: Finished difference Result 274 states and 580 transitions. [2021-03-10 21:54:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:54:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:42,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:42,295 INFO L225 Difference]: With dead ends: 274 [2021-03-10 21:54:42,295 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:54:42,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 584.2ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:54:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:54:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 211. [2021-03-10 21:54:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.223809523809524) internal successors, (467), 210 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 467 transitions. [2021-03-10 21:54:42,298 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 467 transitions. Word has length 19 [2021-03-10 21:54:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:42,298 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 467 transitions. [2021-03-10 21:54:42,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:42,298 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 467 transitions. [2021-03-10 21:54:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:42,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:42,298 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:42,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2009,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:42,499 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1034832384, now seen corresponding path program 246 times [2021-03-10 21:54:42,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:42,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544936269] [2021-03-10 21:54:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:42,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544936269] [2021-03-10 21:54:42,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482286338] [2021-03-10 21:54:42,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:42,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:54:42,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:54:42,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:43,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:43,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:43,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198290872] [2021-03-10 21:54:43,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:43,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:43,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:43,082 INFO L87 Difference]: Start difference. First operand 211 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:43,550 INFO L93 Difference]: Finished difference Result 268 states and 561 transitions. [2021-03-10 21:54:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:54:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:43,552 INFO L225 Difference]: With dead ends: 268 [2021-03-10 21:54:43,552 INFO L226 Difference]: Without dead ends: 266 [2021-03-10 21:54:43,552 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 737.6ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-03-10 21:54:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2021-03-10 21:54:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2146341463414636) internal successors, (454), 205 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 454 transitions. [2021-03-10 21:54:43,554 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 454 transitions. Word has length 19 [2021-03-10 21:54:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:43,554 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 454 transitions. [2021-03-10 21:54:43,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 454 transitions. [2021-03-10 21:54:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:43,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:43,555 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:43,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2018 [2021-03-10 21:54:43,755 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1925543582, now seen corresponding path program 247 times [2021-03-10 21:54:43,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:43,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363422450] [2021-03-10 21:54:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363422450] [2021-03-10 21:54:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270882531] [2021-03-10 21:54:43,901 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:43,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:44,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:44,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:54:44,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907185423] [2021-03-10 21:54:44,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:54:44,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:54:44,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:54:44,334 INFO L87 Difference]: Start difference. First operand 206 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:44,703 INFO L93 Difference]: Finished difference Result 255 states and 542 transitions. [2021-03-10 21:54:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:54:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:44,705 INFO L225 Difference]: With dead ends: 255 [2021-03-10 21:54:44,705 INFO L226 Difference]: Without dead ends: 255 [2021-03-10 21:54:44,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:54:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-03-10 21:54:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 205. [2021-03-10 21:54:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.215686274509804) internal successors, (452), 204 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 452 transitions. [2021-03-10 21:54:44,707 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 452 transitions. Word has length 19 [2021-03-10 21:54:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:44,707 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 452 transitions. [2021-03-10 21:54:44,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 452 transitions. [2021-03-10 21:54:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:44,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:44,708 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:44,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2028,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:44,909 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1418186439, now seen corresponding path program 248 times [2021-03-10 21:54:44,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:44,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560355426] [2021-03-10 21:54:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:45,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560355426] [2021-03-10 21:54:45,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470416160] [2021-03-10 21:54:45,062 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:45,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:45,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:45,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:45,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:45,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623709292] [2021-03-10 21:54:45,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:45,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:45,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:45,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:45,413 INFO L87 Difference]: Start difference. First operand 205 states and 452 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:45,987 INFO L93 Difference]: Finished difference Result 238 states and 514 transitions. [2021-03-10 21:54:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:54:45,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:54:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:45,988 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:54:45,988 INFO L226 Difference]: Without dead ends: 238 [2021-03-10 21:54:45,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 675.9ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:54:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-03-10 21:54:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 206. [2021-03-10 21:54:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2146341463414636) internal successors, (454), 205 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 454 transitions. [2021-03-10 21:54:45,991 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 454 transitions. Word has length 19 [2021-03-10 21:54:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:45,991 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 454 transitions. [2021-03-10 21:54:45,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 454 transitions. [2021-03-10 21:54:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:45,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:45,991 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:46,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2036 [2021-03-10 21:54:46,192 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:46,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1717901873, now seen corresponding path program 249 times [2021-03-10 21:54:46,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:46,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419853079] [2021-03-10 21:54:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:46,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419853079] [2021-03-10 21:54:46,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028520406] [2021-03-10 21:54:46,355 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:46,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:54:46,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:54:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:46,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:46,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:46,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472953407] [2021-03-10 21:54:46,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:46,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:46,714 INFO L87 Difference]: Start difference. First operand 206 states and 454 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:47,314 INFO L93 Difference]: Finished difference Result 251 states and 540 transitions. [2021-03-10 21:54:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:54:47,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:54:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:47,315 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:54:47,315 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:54:47,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 710.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:54:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:54:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 207. [2021-03-10 21:54:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2135922330097086) internal successors, (456), 206 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 456 transitions. [2021-03-10 21:54:47,317 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 456 transitions. Word has length 19 [2021-03-10 21:54:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:47,317 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 456 transitions. [2021-03-10 21:54:47,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:47,317 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 456 transitions. [2021-03-10 21:54:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:47,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:47,317 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:47,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:47,532 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:47,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1506069959, now seen corresponding path program 250 times [2021-03-10 21:54:47,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:47,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011832750] [2021-03-10 21:54:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:47,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011832750] [2021-03-10 21:54:47,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490482685] [2021-03-10 21:54:47,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:47,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:47,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:47,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:48,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:48,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:48,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635751054] [2021-03-10 21:54:48,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:48,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:48,070 INFO L87 Difference]: Start difference. First operand 207 states and 456 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:48,674 INFO L93 Difference]: Finished difference Result 249 states and 536 transitions. [2021-03-10 21:54:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:54:48,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:54:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:48,676 INFO L225 Difference]: With dead ends: 249 [2021-03-10 21:54:48,676 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:54:48,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 727.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:54:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:54:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 208. [2021-03-10 21:54:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.21256038647343) internal successors, (458), 207 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 458 transitions. [2021-03-10 21:54:48,679 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 458 transitions. Word has length 19 [2021-03-10 21:54:48,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:48,679 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 458 transitions. [2021-03-10 21:54:48,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 458 transitions. [2021-03-10 21:54:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:48,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:48,679 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:48,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2046 [2021-03-10 21:54:48,891 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:48,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1992161585, now seen corresponding path program 251 times [2021-03-10 21:54:48,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:48,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779571638] [2021-03-10 21:54:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:49,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779571638] [2021-03-10 21:54:49,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010191646] [2021-03-10 21:54:49,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:49,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:54:49,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:49,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:49,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:49,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703269430] [2021-03-10 21:54:49,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:49,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:49,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:49,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:49,421 INFO L87 Difference]: Start difference. First operand 208 states and 458 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:50,520 INFO L93 Difference]: Finished difference Result 288 states and 596 transitions. [2021-03-10 21:54:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:54:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:50,522 INFO L225 Difference]: With dead ends: 288 [2021-03-10 21:54:50,522 INFO L226 Difference]: Without dead ends: 288 [2021-03-10 21:54:50,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1126.3ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:54:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-03-10 21:54:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 209. [2021-03-10 21:54:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2211538461538463) internal successors, (462), 208 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 462 transitions. [2021-03-10 21:54:50,524 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 462 transitions. Word has length 19 [2021-03-10 21:54:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:50,524 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 462 transitions. [2021-03-10 21:54:50,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 462 transitions. [2021-03-10 21:54:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:50,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:50,524 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:50,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2051 [2021-03-10 21:54:50,725 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:50,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1515850139, now seen corresponding path program 252 times [2021-03-10 21:54:50,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:50,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940750525] [2021-03-10 21:54:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:50,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940750525] [2021-03-10 21:54:50,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242436248] [2021-03-10 21:54:50,877 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:50,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:54:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:51,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:51,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:51,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166252743] [2021-03-10 21:54:51,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:51,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:51,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:51,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:51,256 INFO L87 Difference]: Start difference. First operand 209 states and 462 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:51,964 INFO L93 Difference]: Finished difference Result 246 states and 527 transitions. [2021-03-10 21:54:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:51,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:51,965 INFO L225 Difference]: With dead ends: 246 [2021-03-10 21:54:51,965 INFO L226 Difference]: Without dead ends: 243 [2021-03-10 21:54:51,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 800.6ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:54:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-03-10 21:54:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2021-03-10 21:54:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-03-10 21:54:51,967 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-03-10 21:54:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:51,967 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-03-10 21:54:51,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-03-10 21:54:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:51,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:51,967 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:52,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:52,168 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash -864765492, now seen corresponding path program 253 times [2021-03-10 21:54:52,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:52,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22114858] [2021-03-10 21:54:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:52,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22114858] [2021-03-10 21:54:52,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946086693] [2021-03-10 21:54:52,315 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:52,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:52,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:52,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:52,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:52,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774775553] [2021-03-10 21:54:52,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:52,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:52,782 INFO L87 Difference]: Start difference. First operand 209 states and 461 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:53,302 INFO L93 Difference]: Finished difference Result 245 states and 520 transitions. [2021-03-10 21:54:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:54:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:53,303 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:54:53,303 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 21:54:53,304 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 773.3ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:54:53,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 21:54:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 209. [2021-03-10 21:54:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-03-10 21:54:53,306 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-03-10 21:54:53,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:53,306 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-03-10 21:54:53,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-03-10 21:54:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:53,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:53,307 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:53,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2070,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:53,514 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash -450444695, now seen corresponding path program 254 times [2021-03-10 21:54:53,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:53,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261606371] [2021-03-10 21:54:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261606371] [2021-03-10 21:54:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066407155] [2021-03-10 21:54:53,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:53,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:54:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:53,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:54:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:54,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:54,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:54:54,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153115191] [2021-03-10 21:54:54,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:54:54,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:54,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:54:54,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:54:54,161 INFO L87 Difference]: Start difference. First operand 209 states and 461 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:54,507 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-10 21:54:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:55,193 INFO L93 Difference]: Finished difference Result 254 states and 547 transitions. [2021-03-10 21:54:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:54:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:55,195 INFO L225 Difference]: With dead ends: 254 [2021-03-10 21:54:55,195 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 21:54:55,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1200.4ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:54:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 21:54:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 211. [2021-03-10 21:54:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2142857142857144) internal successors, (465), 210 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 465 transitions. [2021-03-10 21:54:55,197 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 465 transitions. Word has length 19 [2021-03-10 21:54:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:55,197 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 465 transitions. [2021-03-10 21:54:55,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 465 transitions. [2021-03-10 21:54:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:55,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:55,198 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:55,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2078 [2021-03-10 21:54:55,398 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1521440159, now seen corresponding path program 255 times [2021-03-10 21:54:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:55,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307359898] [2021-03-10 21:54:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:55,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307359898] [2021-03-10 21:54:55,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544649545] [2021-03-10 21:54:55,568 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:55,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:54:55,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:54:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:55,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:55,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:55,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074237043] [2021-03-10 21:54:55,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:55,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:55,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:55,964 INFO L87 Difference]: Start difference. First operand 211 states and 465 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:56,746 INFO L93 Difference]: Finished difference Result 255 states and 549 transitions. [2021-03-10 21:54:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:54:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:54:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:56,747 INFO L225 Difference]: With dead ends: 255 [2021-03-10 21:54:56,747 INFO L226 Difference]: Without dead ends: 255 [2021-03-10 21:54:56,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 867.0ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:54:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-03-10 21:54:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-03-10 21:54:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.213270142180095) internal successors, (467), 211 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2021-03-10 21:54:56,749 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 19 [2021-03-10 21:54:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:56,749 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2021-03-10 21:54:56,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2021-03-10 21:54:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:56,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:56,750 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:56,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2082,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:56,950 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash -724704407, now seen corresponding path program 256 times [2021-03-10 21:54:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:56,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560494048] [2021-03-10 21:54:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:57,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560494048] [2021-03-10 21:54:57,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654820486] [2021-03-10 21:54:57,108 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:57,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:57,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:57,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:57,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:57,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:57,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:54:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613359954] [2021-03-10 21:54:57,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:54:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:54:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:57,511 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:59,414 INFO L93 Difference]: Finished difference Result 315 states and 653 transitions. [2021-03-10 21:54:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:54:59,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:54:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:59,415 INFO L225 Difference]: With dead ends: 315 [2021-03-10 21:54:59,415 INFO L226 Difference]: Without dead ends: 315 [2021-03-10 21:54:59,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1832.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:54:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-10 21:54:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 221. [2021-03-10 21:54:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2409090909090907) internal successors, (493), 220 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 493 transitions. [2021-03-10 21:54:59,418 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 493 transitions. Word has length 19 [2021-03-10 21:54:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:59,418 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 493 transitions. [2021-03-10 21:54:59,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 493 transitions. [2021-03-10 21:54:59,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:54:59,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:59,419 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:59,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:59,634 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:59,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:59,634 INFO L82 PathProgramCache]: Analyzing trace with hash 402691686, now seen corresponding path program 257 times [2021-03-10 21:54:59,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:59,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218045427] [2021-03-10 21:54:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:59,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218045427] [2021-03-10 21:54:59,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114189812] [2021-03-10 21:54:59,796 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:59,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:54:59,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:59,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:54:59,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:00,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:00,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:00,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811822651] [2021-03-10 21:55:00,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:00,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:00,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:00,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:00,271 INFO L87 Difference]: Start difference. First operand 221 states and 493 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:01,233 INFO L93 Difference]: Finished difference Result 253 states and 549 transitions. [2021-03-10 21:55:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:01,234 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:55:01,234 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:55:01,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1081.0ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:55:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:55:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 221. [2021-03-10 21:55:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2363636363636363) internal successors, (492), 220 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 492 transitions. [2021-03-10 21:55:01,237 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 492 transitions. Word has length 19 [2021-03-10 21:55:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:01,237 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 492 transitions. [2021-03-10 21:55:01,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 492 transitions. [2021-03-10 21:55:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:01,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:01,237 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:01,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:01,439 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:01,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:01,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1290392199, now seen corresponding path program 258 times [2021-03-10 21:55:01,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:01,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747179675] [2021-03-10 21:55:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747179675] [2021-03-10 21:55:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334762045] [2021-03-10 21:55:01,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:01,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:55:01,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:01,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:55:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:02,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:02,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:02,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282545702] [2021-03-10 21:55:02,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:02,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:02,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:02,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:02,043 INFO L87 Difference]: Start difference. First operand 221 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:03,282 INFO L93 Difference]: Finished difference Result 264 states and 574 transitions. [2021-03-10 21:55:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:55:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:55:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:03,284 INFO L225 Difference]: With dead ends: 264 [2021-03-10 21:55:03,284 INFO L226 Difference]: Without dead ends: 264 [2021-03-10 21:55:03,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1321.5ms TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:55:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-03-10 21:55:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 223. [2021-03-10 21:55:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.234234234234234) internal successors, (496), 222 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 496 transitions. [2021-03-10 21:55:03,287 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 496 transitions. Word has length 19 [2021-03-10 21:55:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:03,287 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 496 transitions. [2021-03-10 21:55:03,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 496 transitions. [2021-03-10 21:55:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:03,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:03,287 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:03,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2104 [2021-03-10 21:55:03,487 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:03,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:03,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2087127951, now seen corresponding path program 259 times [2021-03-10 21:55:03,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:03,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205767907] [2021-03-10 21:55:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:03,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205767907] [2021-03-10 21:55:03,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52038011] [2021-03-10 21:55:03,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:03,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:03,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:04,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:04,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:04,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986498898] [2021-03-10 21:55:04,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:04,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:04,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:04,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:04,122 INFO L87 Difference]: Start difference. First operand 223 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:05,575 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 21:55:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:05,847 INFO L93 Difference]: Finished difference Result 314 states and 656 transitions. [2021-03-10 21:55:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:55:05,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:05,848 INFO L225 Difference]: With dead ends: 314 [2021-03-10 21:55:05,848 INFO L226 Difference]: Without dead ends: 314 [2021-03-10 21:55:05,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1799.8ms TimeCoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:55:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-03-10 21:55:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 226. [2021-03-10 21:55:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.24) internal successors, (504), 225 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 504 transitions. [2021-03-10 21:55:05,851 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 504 transitions. Word has length 19 [2021-03-10 21:55:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:05,851 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 504 transitions. [2021-03-10 21:55:05,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 504 transitions. [2021-03-10 21:55:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:05,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:05,851 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:06,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:06,052 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:06,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1731527899, now seen corresponding path program 260 times [2021-03-10 21:55:06,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:06,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441657199] [2021-03-10 21:55:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:06,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441657199] [2021-03-10 21:55:06,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895460874] [2021-03-10 21:55:06,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:06,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:55:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:06,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:06,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:06,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803482441] [2021-03-10 21:55:06,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:06,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:06,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:06,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:06,716 INFO L87 Difference]: Start difference. First operand 226 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:07,236 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 21:55:07,388 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-10 21:55:07,751 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 21:55:07,882 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:55:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:08,383 INFO L93 Difference]: Finished difference Result 272 states and 587 transitions. [2021-03-10 21:55:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:55:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:08,387 INFO L225 Difference]: With dead ends: 272 [2021-03-10 21:55:08,387 INFO L226 Difference]: Without dead ends: 269 [2021-03-10 21:55:08,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1811.4ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:55:08,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-03-10 21:55:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 226. [2021-03-10 21:55:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2355555555555555) internal successors, (503), 225 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 503 transitions. [2021-03-10 21:55:08,389 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 503 transitions. Word has length 19 [2021-03-10 21:55:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:08,390 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 503 transitions. [2021-03-10 21:55:08,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 503 transitions. [2021-03-10 21:55:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:08,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:08,390 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:08,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2118 [2021-03-10 21:55:08,591 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1080443252, now seen corresponding path program 261 times [2021-03-10 21:55:08,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:08,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696895679] [2021-03-10 21:55:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:08,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696895679] [2021-03-10 21:55:08,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043267763] [2021-03-10 21:55:08,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:08,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:55:08,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:55:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:09,255 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:55:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:09,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:09,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:09,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481347135] [2021-03-10 21:55:09,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:09,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:09,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:09,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:09,324 INFO L87 Difference]: Start difference. First operand 226 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:09,754 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 21:55:09,891 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 21:55:10,251 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 21:55:10,392 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 21:55:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:11,426 INFO L93 Difference]: Finished difference Result 282 states and 602 transitions. [2021-03-10 21:55:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:55:11,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:11,428 INFO L225 Difference]: With dead ends: 282 [2021-03-10 21:55:11,428 INFO L226 Difference]: Without dead ends: 282 [2021-03-10 21:55:11,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2249.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:55:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-03-10 21:55:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 225. [2021-03-10 21:55:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2410714285714284) internal successors, (502), 224 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 502 transitions. [2021-03-10 21:55:11,430 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 502 transitions. Word has length 19 [2021-03-10 21:55:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:11,430 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 502 transitions. [2021-03-10 21:55:11,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 502 transitions. [2021-03-10 21:55:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:11,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:11,431 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:11,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2126,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:11,631 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:11,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1701493079, now seen corresponding path program 262 times [2021-03-10 21:55:11,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:11,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433121135] [2021-03-10 21:55:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:11,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433121135] [2021-03-10 21:55:11,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292028674] [2021-03-10 21:55:11,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:11,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:12,317 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:55:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:12,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:12,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:12,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163559784] [2021-03-10 21:55:12,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:12,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:12,382 INFO L87 Difference]: Start difference. First operand 225 states and 502 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:13,654 INFO L93 Difference]: Finished difference Result 262 states and 572 transitions. [2021-03-10 21:55:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:55:13,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:13,655 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:55:13,656 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 21:55:13,656 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1586.0ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:55:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 21:55:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 225. [2021-03-10 21:55:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2410714285714284) internal successors, (502), 224 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 502 transitions. [2021-03-10 21:55:13,658 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 502 transitions. Word has length 19 [2021-03-10 21:55:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:13,658 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 502 transitions. [2021-03-10 21:55:13,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 502 transitions. [2021-03-10 21:55:13,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:13,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:13,658 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:13,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:13,859 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1413942844, now seen corresponding path program 263 times [2021-03-10 21:55:13,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:13,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146089780] [2021-03-10 21:55:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:14,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146089780] [2021-03-10 21:55:14,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672160336] [2021-03-10 21:55:14,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:14,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:55:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:14,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:14,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:14,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603028638] [2021-03-10 21:55:14,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:14,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:14,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:14,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:14,474 INFO L87 Difference]: Start difference. First operand 225 states and 502 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:16,064 INFO L93 Difference]: Finished difference Result 331 states and 694 transitions. [2021-03-10 21:55:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:55:16,065 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:16,066 INFO L225 Difference]: With dead ends: 331 [2021-03-10 21:55:16,066 INFO L226 Difference]: Without dead ends: 331 [2021-03-10 21:55:16,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1606.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:55:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-03-10 21:55:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 228. [2021-03-10 21:55:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.251101321585903) internal successors, (511), 227 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 511 transitions. [2021-03-10 21:55:16,069 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 511 transitions. Word has length 19 [2021-03-10 21:55:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:16,069 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 511 transitions. [2021-03-10 21:55:16,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 511 transitions. [2021-03-10 21:55:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:16,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:16,069 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:16,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2140 [2021-03-10 21:55:16,270 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:16,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1111952564, now seen corresponding path program 264 times [2021-03-10 21:55:16,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:16,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906652034] [2021-03-10 21:55:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:16,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906652034] [2021-03-10 21:55:16,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67851886] [2021-03-10 21:55:16,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:16,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:55:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:55:16,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:16,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:16,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:16,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423540537] [2021-03-10 21:55:16,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:16,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:16,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:16,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:16,920 INFO L87 Difference]: Start difference. First operand 228 states and 511 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:18,320 INFO L93 Difference]: Finished difference Result 282 states and 612 transitions. [2021-03-10 21:55:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:55:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:18,322 INFO L225 Difference]: With dead ends: 282 [2021-03-10 21:55:18,322 INFO L226 Difference]: Without dead ends: 282 [2021-03-10 21:55:18,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1475.6ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:55:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-03-10 21:55:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 226. [2021-03-10 21:55:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.24) internal successors, (504), 225 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 504 transitions. [2021-03-10 21:55:18,324 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 504 transitions. Word has length 19 [2021-03-10 21:55:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:18,324 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 504 transitions. [2021-03-10 21:55:18,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 504 transitions. [2021-03-10 21:55:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:18,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:18,325 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:18,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2149 [2021-03-10 21:55:18,525 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash -57431139, now seen corresponding path program 265 times [2021-03-10 21:55:18,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:18,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110989024] [2021-03-10 21:55:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110989024] [2021-03-10 21:55:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847483417] [2021-03-10 21:55:18,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:18,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:19,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:19,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:19,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697821199] [2021-03-10 21:55:19,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:19,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:19,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:19,068 INFO L87 Difference]: Start difference. First operand 226 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:19,575 INFO L93 Difference]: Finished difference Result 248 states and 546 transitions. [2021-03-10 21:55:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:55:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:55:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:19,576 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:55:19,576 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:55:19,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 664.3ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:55:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:55:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 226. [2021-03-10 21:55:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.24) internal successors, (504), 225 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 504 transitions. [2021-03-10 21:55:19,579 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 504 transitions. Word has length 19 [2021-03-10 21:55:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:19,579 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 504 transitions. [2021-03-10 21:55:19,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 504 transitions. [2021-03-10 21:55:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:19,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:19,580 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:19,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2154,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:19,780 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:19,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1101447845, now seen corresponding path program 266 times [2021-03-10 21:55:19,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:19,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175746322] [2021-03-10 21:55:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:19,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175746322] [2021-03-10 21:55:19,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304685852] [2021-03-10 21:55:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:19,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:19,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:19,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:55:19,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:20,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:20,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:20,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478493954] [2021-03-10 21:55:20,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:20,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:20,452 INFO L87 Difference]: Start difference. First operand 226 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:20,744 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 21:55:20,889 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 21:55:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:21,631 INFO L93 Difference]: Finished difference Result 264 states and 578 transitions. [2021-03-10 21:55:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:55:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:55:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:21,633 INFO L225 Difference]: With dead ends: 264 [2021-03-10 21:55:21,633 INFO L226 Difference]: Without dead ends: 264 [2021-03-10 21:55:21,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1442.6ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:55:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-03-10 21:55:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 226. [2021-03-10 21:55:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.24) internal successors, (504), 225 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 504 transitions. [2021-03-10 21:55:21,635 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 504 transitions. Word has length 19 [2021-03-10 21:55:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:21,635 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 504 transitions. [2021-03-10 21:55:21,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 504 transitions. [2021-03-10 21:55:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:21,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:21,636 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:21,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2159,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:21,836 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash 30452381, now seen corresponding path program 267 times [2021-03-10 21:55:21,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:21,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482684395] [2021-03-10 21:55:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:22,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482684395] [2021-03-10 21:55:22,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918666242] [2021-03-10 21:55:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:22,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:55:22,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:22,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:22,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:22,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:22,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254400993] [2021-03-10 21:55:22,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:22,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:22,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:22,473 INFO L87 Difference]: Start difference. First operand 226 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:23,470 INFO L93 Difference]: Finished difference Result 267 states and 584 transitions. [2021-03-10 21:55:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:55:23,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:55:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:23,471 INFO L225 Difference]: With dead ends: 267 [2021-03-10 21:55:23,471 INFO L226 Difference]: Without dead ends: 267 [2021-03-10 21:55:23,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1083.2ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:55:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-03-10 21:55:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 227. [2021-03-10 21:55:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2389380530973453) internal successors, (506), 226 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 506 transitions. [2021-03-10 21:55:23,473 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 506 transitions. Word has length 19 [2021-03-10 21:55:23,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:23,473 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 506 transitions. [2021-03-10 21:55:23,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 506 transitions. [2021-03-10 21:55:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:23,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:23,474 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:23,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:23,674 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:23,675 INFO L82 PathProgramCache]: Analyzing trace with hash 827188133, now seen corresponding path program 268 times [2021-03-10 21:55:23,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:23,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422224149] [2021-03-10 21:55:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:23,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422224149] [2021-03-10 21:55:23,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164070077] [2021-03-10 21:55:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:23,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:23,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:23,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:23,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:24,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:24,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:24,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135392510] [2021-03-10 21:55:24,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:24,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:24,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:24,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:24,282 INFO L87 Difference]: Start difference. First operand 227 states and 506 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:24,725 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-03-10 21:55:24,894 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 21:55:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:25,934 INFO L93 Difference]: Finished difference Result 297 states and 632 transitions. [2021-03-10 21:55:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:55:25,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:25,936 INFO L225 Difference]: With dead ends: 297 [2021-03-10 21:55:25,936 INFO L226 Difference]: Without dead ends: 297 [2021-03-10 21:55:25,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1638.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:55:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-03-10 21:55:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 228. [2021-03-10 21:55:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.246696035242291) internal successors, (510), 227 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 510 transitions. [2021-03-10 21:55:25,938 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 510 transitions. Word has length 19 [2021-03-10 21:55:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:25,938 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 510 transitions. [2021-03-10 21:55:25,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 510 transitions. [2021-03-10 21:55:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:25,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:25,939 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:26,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-03-10 21:55:26,139 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:26,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1303499579, now seen corresponding path program 269 times [2021-03-10 21:55:26,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:26,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208821653] [2021-03-10 21:55:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:26,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208821653] [2021-03-10 21:55:26,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183870351] [2021-03-10 21:55:26,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:26,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:55:26,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:26,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:55:26,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:26,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:26,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:26,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406413905] [2021-03-10 21:55:26,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:26,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:26,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:26,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:26,752 INFO L87 Difference]: Start difference. First operand 228 states and 510 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:27,872 INFO L93 Difference]: Finished difference Result 263 states and 572 transitions. [2021-03-10 21:55:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:55:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:27,873 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:55:27,873 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:55:27,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1231.3ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:55:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:55:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 228. [2021-03-10 21:55:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2422907488986783) internal successors, (509), 227 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 509 transitions. [2021-03-10 21:55:27,876 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 509 transitions. Word has length 19 [2021-03-10 21:55:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:27,876 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 509 transitions. [2021-03-10 21:55:27,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 509 transitions. [2021-03-10 21:55:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:27,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:27,877 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:28,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:28,077 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:28,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1954584226, now seen corresponding path program 270 times [2021-03-10 21:55:28,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:28,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908978738] [2021-03-10 21:55:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:28,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908978738] [2021-03-10 21:55:28,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684823583] [2021-03-10 21:55:28,239 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:28,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:55:28,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:55:28,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:28,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:28,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:55:28,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92536211] [2021-03-10 21:55:28,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:55:28,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:55:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:55:28,753 INFO L87 Difference]: Start difference. First operand 228 states and 509 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:29,430 INFO L93 Difference]: Finished difference Result 249 states and 546 transitions. [2021-03-10 21:55:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:55:29,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:29,432 INFO L225 Difference]: With dead ends: 249 [2021-03-10 21:55:29,432 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:55:29,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 854.7ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:55:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:55:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 224. [2021-03-10 21:55:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.242152466367713) internal successors, (500), 223 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 500 transitions. [2021-03-10 21:55:29,434 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 500 transitions. Word has length 19 [2021-03-10 21:55:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:29,434 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 500 transitions. [2021-03-10 21:55:29,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 500 transitions. [2021-03-10 21:55:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:29,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:29,434 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:29,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:29,635 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1926062273, now seen corresponding path program 271 times [2021-03-10 21:55:29,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:29,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732754698] [2021-03-10 21:55:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:29,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732754698] [2021-03-10 21:55:29,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901330886] [2021-03-10 21:55:29,822 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:29,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:30,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:30,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:30,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276135364] [2021-03-10 21:55:30,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:30,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:30,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:30,222 INFO L87 Difference]: Start difference. First operand 224 states and 500 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:30,805 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2021-03-10 21:55:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:55:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:55:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:30,806 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:55:30,806 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:55:30,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 713.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:55:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:55:30,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 223. [2021-03-10 21:55:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2387387387387387) internal successors, (497), 222 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 497 transitions. [2021-03-10 21:55:30,809 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 497 transitions. Word has length 19 [2021-03-10 21:55:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:30,809 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 497 transitions. [2021-03-10 21:55:30,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 497 transitions. [2021-03-10 21:55:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:30,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:30,809 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:31,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2195,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:31,010 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:31,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1297909559, now seen corresponding path program 272 times [2021-03-10 21:55:31,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:31,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310853982] [2021-03-10 21:55:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:31,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310853982] [2021-03-10 21:55:31,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670560316] [2021-03-10 21:55:31,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:31,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:31,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:31,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:31,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:31,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:31,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582887041] [2021-03-10 21:55:31,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:31,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:31,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:31,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:31,609 INFO L87 Difference]: Start difference. First operand 223 states and 497 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:32,595 INFO L93 Difference]: Finished difference Result 260 states and 564 transitions. [2021-03-10 21:55:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:32,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:55:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:32,596 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:55:32,596 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:55:32,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1109.7ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:55:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:55:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 216. [2021-03-10 21:55:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2232558139534886) internal successors, (478), 215 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 478 transitions. [2021-03-10 21:55:32,599 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 478 transitions. Word has length 19 [2021-03-10 21:55:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:32,599 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 478 transitions. [2021-03-10 21:55:32,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 478 transitions. [2021-03-10 21:55:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:32,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:32,599 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:32,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-03-10 21:55:32,800 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash 611510373, now seen corresponding path program 273 times [2021-03-10 21:55:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:32,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547977005] [2021-03-10 21:55:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:33,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547977005] [2021-03-10 21:55:33,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312306904] [2021-03-10 21:55:33,034 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:33,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:55:33,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:55:33,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:33,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:33,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:55:33,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295057852] [2021-03-10 21:55:33,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:55:33,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:33,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:55:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:55:33,453 INFO L87 Difference]: Start difference. First operand 216 states and 478 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:34,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:34,340 INFO L93 Difference]: Finished difference Result 259 states and 557 transitions. [2021-03-10 21:55:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:55:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:34,341 INFO L225 Difference]: With dead ends: 259 [2021-03-10 21:55:34,341 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 21:55:34,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1072.1ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:55:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 21:55:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 212. [2021-03-10 21:55:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-03-10 21:55:34,344 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-03-10 21:55:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:34,344 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-03-10 21:55:34,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-03-10 21:55:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:34,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:34,344 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:34,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2205,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:34,545 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1289595419, now seen corresponding path program 274 times [2021-03-10 21:55:34,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:34,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381277767] [2021-03-10 21:55:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:34,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381277767] [2021-03-10 21:55:34,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601355951] [2021-03-10 21:55:34,720 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:34,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:34,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:34,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:34,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:35,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:35,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:35,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678772572] [2021-03-10 21:55:35,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:35,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:35,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:35,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:35,095 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:35,398 INFO L93 Difference]: Finished difference Result 243 states and 528 transitions. [2021-03-10 21:55:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:55:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:35,400 INFO L225 Difference]: With dead ends: 243 [2021-03-10 21:55:35,400 INFO L226 Difference]: Without dead ends: 243 [2021-03-10 21:55:35,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-03-10 21:55:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 212. [2021-03-10 21:55:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-03-10 21:55:35,402 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-03-10 21:55:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:35,402 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-03-10 21:55:35,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-03-10 21:55:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:35,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:35,402 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:35,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2214,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:35,607 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1934376413, now seen corresponding path program 275 times [2021-03-10 21:55:35,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:35,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452813118] [2021-03-10 21:55:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:35,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452813118] [2021-03-10 21:55:35,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688341171] [2021-03-10 21:55:35,789 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:35,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:55:35,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:55:35,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:36,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:36,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:36,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91323616] [2021-03-10 21:55:36,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:36,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:36,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:36,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:36,397 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:37,034 INFO L93 Difference]: Finished difference Result 257 states and 556 transitions. [2021-03-10 21:55:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:55:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:37,036 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:55:37,036 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 21:55:37,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 921.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:55:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 21:55:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 212. [2021-03-10 21:55:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-03-10 21:55:37,038 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-03-10 21:55:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:37,038 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-03-10 21:55:37,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-03-10 21:55:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:37,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:37,038 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:37,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2219 [2021-03-10 21:55:37,239 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1563855131, now seen corresponding path program 276 times [2021-03-10 21:55:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346579657] [2021-03-10 21:55:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:37,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346579657] [2021-03-10 21:55:37,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469584409] [2021-03-10 21:55:37,410 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:37,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:55:37,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:55:37,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:37,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:37,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:37,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611079141] [2021-03-10 21:55:37,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:37,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:37,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:37,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:37,987 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:38,265 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 21:55:38,504 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 21:55:38,819 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 21:55:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:39,211 INFO L93 Difference]: Finished difference Result 267 states and 571 transitions. [2021-03-10 21:55:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:55:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:39,212 INFO L225 Difference]: With dead ends: 267 [2021-03-10 21:55:39,213 INFO L226 Difference]: Without dead ends: 264 [2021-03-10 21:55:39,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1350.2ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:55:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-03-10 21:55:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 212. [2021-03-10 21:55:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.213270142180095) internal successors, (467), 211 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2021-03-10 21:55:39,215 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 19 [2021-03-10 21:55:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:39,215 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2021-03-10 21:55:39,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2021-03-10 21:55:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:39,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:39,216 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:39,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-03-10 21:55:39,416 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash -436459038, now seen corresponding path program 277 times [2021-03-10 21:55:39,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:39,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300250572] [2021-03-10 21:55:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:39,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300250572] [2021-03-10 21:55:39,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713038203] [2021-03-10 21:55:39,618 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:55:39,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:40,107 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:55:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:40,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:40,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:40,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170186513] [2021-03-10 21:55:40,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:40,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:40,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:40,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:40,274 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:40,514 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:55:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:41,073 INFO L93 Difference]: Finished difference Result 271 states and 574 transitions. [2021-03-10 21:55:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:55:41,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:41,075 INFO L225 Difference]: With dead ends: 271 [2021-03-10 21:55:41,075 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:55:41,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1217.8ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:55:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:55:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 208. [2021-03-10 21:55:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2028985507246377) internal successors, (456), 207 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 456 transitions. [2021-03-10 21:55:41,077 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 456 transitions. Word has length 19 [2021-03-10 21:55:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:41,077 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 456 transitions. [2021-03-10 21:55:41,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 456 transitions. [2021-03-10 21:55:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:41,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:41,078 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:41,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2229 [2021-03-10 21:55:41,278 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash 451241475, now seen corresponding path program 278 times [2021-03-10 21:55:41,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:41,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948081434] [2021-03-10 21:55:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:41,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948081434] [2021-03-10 21:55:41,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298845951] [2021-03-10 21:55:41,531 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:41,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:41,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:41,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:41,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:41,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835933684] [2021-03-10 21:55:41,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:41,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:41,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:41,938 INFO L87 Difference]: Start difference. First operand 208 states and 456 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:42,372 INFO L93 Difference]: Finished difference Result 234 states and 506 transitions. [2021-03-10 21:55:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:55:42,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:42,374 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:55:42,374 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:55:42,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 701.3ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:55:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:55:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 210. [2021-03-10 21:55:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-03-10 21:55:42,376 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-03-10 21:55:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:42,376 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-03-10 21:55:42,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-03-10 21:55:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:42,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:42,377 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:42,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2236,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:42,577 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:42,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1247977227, now seen corresponding path program 279 times [2021-03-10 21:55:42,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:42,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669323808] [2021-03-10 21:55:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:42,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669323808] [2021-03-10 21:55:42,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665473791] [2021-03-10 21:55:42,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:42,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:55:42,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:42,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:55:42,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:43,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:43,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:43,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722932431] [2021-03-10 21:55:43,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:43,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:43,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:43,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:43,349 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:43,853 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:55:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:44,237 INFO L93 Difference]: Finished difference Result 250 states and 535 transitions. [2021-03-10 21:55:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:55:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:44,238 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:55:44,238 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:55:44,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1077.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:55:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:55:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 211. [2021-03-10 21:55:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.204761904761905) internal successors, (463), 210 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 463 transitions. [2021-03-10 21:55:44,241 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 463 transitions. Word has length 19 [2021-03-10 21:55:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:44,241 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 463 transitions. [2021-03-10 21:55:44,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 463 transitions. [2021-03-10 21:55:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:44,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:44,241 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:44,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2241,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:44,442 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:44,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1919593976, now seen corresponding path program 280 times [2021-03-10 21:55:44,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:44,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426707145] [2021-03-10 21:55:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:44,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426707145] [2021-03-10 21:55:44,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564322503] [2021-03-10 21:55:44,671 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:44,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:44,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:44,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:44,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:45,055 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:55:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:45,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:45,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:45,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990537098] [2021-03-10 21:55:45,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:45,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:45,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:45,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:45,120 INFO L87 Difference]: Start difference. First operand 211 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:45,925 INFO L93 Difference]: Finished difference Result 256 states and 542 transitions. [2021-03-10 21:55:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:55:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:45,927 INFO L225 Difference]: With dead ends: 256 [2021-03-10 21:55:45,927 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 21:55:45,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1031.2ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:55:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 21:55:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 209. [2021-03-10 21:55:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.201923076923077) internal successors, (458), 208 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 458 transitions. [2021-03-10 21:55:45,929 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 458 transitions. Word has length 19 [2021-03-10 21:55:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:45,929 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 458 transitions. [2021-03-10 21:55:45,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 458 transitions. [2021-03-10 21:55:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:45,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:45,930 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:46,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2249 [2021-03-10 21:55:46,130 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:46,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1754323493, now seen corresponding path program 281 times [2021-03-10 21:55:46,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:46,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110600933] [2021-03-10 21:55:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:46,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110600933] [2021-03-10 21:55:46,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629809325] [2021-03-10 21:55:46,372 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:46,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:55:46,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:46,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:55:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:47,016 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:55:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:47,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:47,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:47,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247363768] [2021-03-10 21:55:47,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:47,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:47,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:47,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:47,099 INFO L87 Difference]: Start difference. First operand 209 states and 458 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:47,709 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-03-10 21:55:47,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:47,763 INFO L93 Difference]: Finished difference Result 251 states and 533 transitions. [2021-03-10 21:55:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:47,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:47,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:47,765 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:55:47,765 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:55:47,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1147.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:55:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:55:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 210. [2021-03-10 21:55:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2057416267942584) internal successors, (461), 209 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 461 transitions. [2021-03-10 21:55:47,767 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 461 transitions. Word has length 19 [2021-03-10 21:55:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:47,767 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 461 transitions. [2021-03-10 21:55:47,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:47,767 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 461 transitions. [2021-03-10 21:55:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:47,768 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:47,768 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:47,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2257 [2021-03-10 21:55:47,968 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2041873728, now seen corresponding path program 282 times [2021-03-10 21:55:47,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:47,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228124453] [2021-03-10 21:55:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228124453] [2021-03-10 21:55:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168386505] [2021-03-10 21:55:48,195 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:48,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:55:48,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:48,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:55:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:48,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:48,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:48,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721863152] [2021-03-10 21:55:48,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:48,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:48,670 INFO L87 Difference]: Start difference. First operand 210 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:49,433 INFO L93 Difference]: Finished difference Result 314 states and 649 transitions. [2021-03-10 21:55:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:55:49,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:49,435 INFO L225 Difference]: With dead ends: 314 [2021-03-10 21:55:49,435 INFO L226 Difference]: Without dead ends: 314 [2021-03-10 21:55:49,435 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:55:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-03-10 21:55:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 212. [2021-03-10 21:55:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-03-10 21:55:49,437 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-03-10 21:55:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:49,437 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-03-10 21:55:49,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-03-10 21:55:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:49,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:49,438 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:49,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2264,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:49,638 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash 81838403, now seen corresponding path program 283 times [2021-03-10 21:55:49,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:49,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147330756] [2021-03-10 21:55:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:49,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147330756] [2021-03-10 21:55:49,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663209438] [2021-03-10 21:55:49,887 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:49,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:49,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:50,362 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:55:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:50,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:50,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:50,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904657494] [2021-03-10 21:55:50,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:50,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:50,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:50,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:50,446 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:50,953 INFO L93 Difference]: Finished difference Result 238 states and 513 transitions. [2021-03-10 21:55:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:55:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:50,955 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:55:50,955 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:55:50,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:55:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:55:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-03-10 21:55:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.213270142180095) internal successors, (467), 211 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2021-03-10 21:55:50,958 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 19 [2021-03-10 21:55:50,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:50,958 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2021-03-10 21:55:50,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2021-03-10 21:55:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:50,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:50,958 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:51,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2272,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:51,172 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:51,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1951103288, now seen corresponding path program 284 times [2021-03-10 21:55:51,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:51,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240140807] [2021-03-10 21:55:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:51,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240140807] [2021-03-10 21:55:51,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129795373] [2021-03-10 21:55:51,400 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:51,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:51,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:51,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:51,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:51,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:51,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908985393] [2021-03-10 21:55:51,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:51,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:51,790 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:52,329 INFO L93 Difference]: Finished difference Result 255 states and 548 transitions. [2021-03-10 21:55:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:55:52,330 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:52,330 INFO L225 Difference]: With dead ends: 255 [2021-03-10 21:55:52,330 INFO L226 Difference]: Without dead ends: 255 [2021-03-10 21:55:52,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 770.3ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:55:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-03-10 21:55:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 208. [2021-03-10 21:55:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2028985507246377) internal successors, (456), 207 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 456 transitions. [2021-03-10 21:55:52,333 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 456 transitions. Word has length 19 [2021-03-10 21:55:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:52,333 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 456 transitions. [2021-03-10 21:55:52,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 456 transitions. [2021-03-10 21:55:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:52,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:52,333 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:52,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2280 [2021-03-10 21:55:52,534 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1718698653, now seen corresponding path program 285 times [2021-03-10 21:55:52,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:52,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018993829] [2021-03-10 21:55:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:52,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018993829] [2021-03-10 21:55:52,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994327927] [2021-03-10 21:55:52,770 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:52,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:55:52,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:55:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:53,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:53,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:53,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963404786] [2021-03-10 21:55:53,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:53,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:53,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:53,333 INFO L87 Difference]: Start difference. First operand 208 states and 456 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:53,875 INFO L93 Difference]: Finished difference Result 247 states and 532 transitions. [2021-03-10 21:55:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:55:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:53,877 INFO L225 Difference]: With dead ends: 247 [2021-03-10 21:55:53,877 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:55:53,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 851.5ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:55:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:55:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2021-03-10 21:55:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-03-10 21:55:53,879 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-03-10 21:55:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:53,879 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-03-10 21:55:53,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-03-10 21:55:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:53,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:53,879 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:54,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:54,094 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1779532891, now seen corresponding path program 286 times [2021-03-10 21:55:54,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:54,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089477766] [2021-03-10 21:55:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:54,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089477766] [2021-03-10 21:55:54,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315893173] [2021-03-10 21:55:54,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:54,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:54,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:54,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:54,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:54,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:54,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686998296] [2021-03-10 21:55:54,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:54,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:54,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:54,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:54,721 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:55,202 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 21:55:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:55,461 INFO L93 Difference]: Finished difference Result 288 states and 596 transitions. [2021-03-10 21:55:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:55:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:55,462 INFO L225 Difference]: With dead ends: 288 [2021-03-10 21:55:55,462 INFO L226 Difference]: Without dead ends: 288 [2021-03-10 21:55:55,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 919.6ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:55:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-03-10 21:55:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 211. [2021-03-10 21:55:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2095238095238097) internal successors, (464), 210 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 464 transitions. [2021-03-10 21:55:55,465 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 464 transitions. Word has length 19 [2021-03-10 21:55:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:55,465 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 464 transitions. [2021-03-10 21:55:55,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 464 transitions. [2021-03-10 21:55:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:55,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:55,465 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:55,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2288 [2021-03-10 21:55:55,666 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:55,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1303221445, now seen corresponding path program 287 times [2021-03-10 21:55:55,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:55,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854168560] [2021-03-10 21:55:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:55,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854168560] [2021-03-10 21:55:55,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223677145] [2021-03-10 21:55:55,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:55,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:55:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:55,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:55,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:56,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:56,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:56,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957459769] [2021-03-10 21:55:56,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:56,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:56,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:56,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:56,300 INFO L87 Difference]: Start difference. First operand 211 states and 464 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:56,730 INFO L93 Difference]: Finished difference Result 242 states and 519 transitions. [2021-03-10 21:55:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:55:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:56,731 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:55:56,731 INFO L226 Difference]: Without dead ends: 239 [2021-03-10 21:55:56,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:55:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-03-10 21:55:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2021-03-10 21:55:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.204761904761905) internal successors, (463), 210 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 463 transitions. [2021-03-10 21:55:56,734 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 463 transitions. Word has length 19 [2021-03-10 21:55:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:56,734 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 463 transitions. [2021-03-10 21:55:56,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 463 transitions. [2021-03-10 21:55:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:56,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:56,734 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:56,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2297,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:56,934 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:56,935 INFO L82 PathProgramCache]: Analyzing trace with hash -652136798, now seen corresponding path program 288 times [2021-03-10 21:55:56,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:56,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118171479] [2021-03-10 21:55:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:57,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118171479] [2021-03-10 21:55:57,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304174438] [2021-03-10 21:55:57,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:57,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:55:57,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:57,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:55:57,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:57,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:57,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:55:57,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065833986] [2021-03-10 21:55:57,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:55:57,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:55:57,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:55:57,626 INFO L87 Difference]: Start difference. First operand 211 states and 463 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:58,102 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-03-10 21:55:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:55:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:55:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:58,103 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:55:58,104 INFO L226 Difference]: Without dead ends: 239 [2021-03-10 21:55:58,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:55:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-03-10 21:55:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 209. [2021-03-10 21:55:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.201923076923077) internal successors, (458), 208 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 458 transitions. [2021-03-10 21:55:58,106 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 458 transitions. Word has length 19 [2021-03-10 21:55:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:58,106 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 458 transitions. [2021-03-10 21:55:58,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 458 transitions. [2021-03-10 21:55:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:55:58,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:58,106 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:58,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2307,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:58,307 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:58,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1273186625, now seen corresponding path program 289 times [2021-03-10 21:55:58,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:58,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275880662] [2021-03-10 21:55:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:58,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275880662] [2021-03-10 21:55:58,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086391105] [2021-03-10 21:55:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:55:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:59,214 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:55:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:59,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:59,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:55:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215883545] [2021-03-10 21:55:59,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:55:59,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:55:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:55:59,305 INFO L87 Difference]: Start difference. First operand 209 states and 458 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:59,649 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:55:59,941 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:56:00,333 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 21:56:00,619 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 21:56:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:00,736 INFO L93 Difference]: Finished difference Result 263 states and 551 transitions. [2021-03-10 21:56:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:56:00,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:00,736 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:56:00,736 INFO L226 Difference]: Without dead ends: 263 [2021-03-10 21:56:00,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1908.7ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:56:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-03-10 21:56:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 210. [2021-03-10 21:56:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2057416267942584) internal successors, (461), 209 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 461 transitions. [2021-03-10 21:56:00,738 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 461 transitions. Word has length 19 [2021-03-10 21:56:00,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:00,739 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 461 transitions. [2021-03-10 21:56:00,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 461 transitions. [2021-03-10 21:56:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:00,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:00,739 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:00,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-03-10 21:56:00,940 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:00,940 INFO L82 PathProgramCache]: Analyzing trace with hash -985636390, now seen corresponding path program 290 times [2021-03-10 21:56:00,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:00,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253603376] [2021-03-10 21:56:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:01,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253603376] [2021-03-10 21:56:01,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357518651] [2021-03-10 21:56:01,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:01,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:01,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:01,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:56:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:01,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:01,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:01,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339903814] [2021-03-10 21:56:01,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:01,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:01,706 INFO L87 Difference]: Start difference. First operand 210 states and 461 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:02,766 INFO L93 Difference]: Finished difference Result 302 states and 632 transitions. [2021-03-10 21:56:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:56:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:02,767 INFO L225 Difference]: With dead ends: 302 [2021-03-10 21:56:02,767 INFO L226 Difference]: Without dead ends: 302 [2021-03-10 21:56:02,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:56:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-03-10 21:56:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 212. [2021-03-10 21:56:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-03-10 21:56:02,774 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-03-10 21:56:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:02,774 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-03-10 21:56:02,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-03-10 21:56:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:02,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:02,774 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:02,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2323 [2021-03-10 21:56:02,975 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1349295581, now seen corresponding path program 291 times [2021-03-10 21:56:02,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:02,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239299509] [2021-03-10 21:56:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:03,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239299509] [2021-03-10 21:56:03,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581541580] [2021-03-10 21:56:03,208 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:03,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:56:03,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:03,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:03,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:03,676 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:56:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:03,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:03,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:03,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013219180] [2021-03-10 21:56:03,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:03,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:03,753 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:04,320 INFO L93 Difference]: Finished difference Result 237 states and 511 transitions. [2021-03-10 21:56:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:04,322 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:56:04,322 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:56:04,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:56:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:56:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 212. [2021-03-10 21:56:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.213270142180095) internal successors, (467), 211 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2021-03-10 21:56:04,324 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 19 [2021-03-10 21:56:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:04,324 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2021-03-10 21:56:04,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2021-03-10 21:56:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:04,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:04,325 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:04,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2332 [2021-03-10 21:56:04,525 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash -683646110, now seen corresponding path program 292 times [2021-03-10 21:56:04,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:04,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823567804] [2021-03-10 21:56:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823567804] [2021-03-10 21:56:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36340249] [2021-03-10 21:56:04,772 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:04,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:04,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:05,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:05,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:05,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123427606] [2021-03-10 21:56:05,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:05,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:05,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:05,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:05,168 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:05,815 INFO L93 Difference]: Finished difference Result 255 states and 548 transitions. [2021-03-10 21:56:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:56:05,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:05,816 INFO L225 Difference]: With dead ends: 255 [2021-03-10 21:56:05,816 INFO L226 Difference]: Without dead ends: 255 [2021-03-10 21:56:05,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 838.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:56:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-03-10 21:56:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 209. [2021-03-10 21:56:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.201923076923077) internal successors, (458), 208 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 458 transitions. [2021-03-10 21:56:05,818 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 458 transitions. Word has length 19 [2021-03-10 21:56:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:05,819 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 458 transitions. [2021-03-10 21:56:05,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 458 transitions. [2021-03-10 21:56:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:05,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:05,819 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:06,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:06,019 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash 698799875, now seen corresponding path program 293 times [2021-03-10 21:56:06,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:06,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687814504] [2021-03-10 21:56:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:06,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687814504] [2021-03-10 21:56:06,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781510613] [2021-03-10 21:56:06,213 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:06,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:56:06,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:06,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:56:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:06,698 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:56:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:06,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:06,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:06,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118388661] [2021-03-10 21:56:06,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:06,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:06,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:06,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:06,851 INFO L87 Difference]: Start difference. First operand 209 states and 458 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:07,135 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 21:56:07,295 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 21:56:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:07,328 INFO L93 Difference]: Finished difference Result 255 states and 543 transitions. [2021-03-10 21:56:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:56:07,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:07,330 INFO L225 Difference]: With dead ends: 255 [2021-03-10 21:56:07,330 INFO L226 Difference]: Without dead ends: 255 [2021-03-10 21:56:07,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 932.3ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:56:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-03-10 21:56:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-03-10 21:56:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2085308056872037) internal successors, (466), 211 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 466 transitions. [2021-03-10 21:56:07,332 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 466 transitions. Word has length 19 [2021-03-10 21:56:07,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:07,332 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 466 transitions. [2021-03-10 21:56:07,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 466 transitions. [2021-03-10 21:56:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:07,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:07,332 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:07,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-03-10 21:56:07,533 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1628925470, now seen corresponding path program 294 times [2021-03-10 21:56:07,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:07,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071543723] [2021-03-10 21:56:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:07,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071543723] [2021-03-10 21:56:07,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477325482] [2021-03-10 21:56:07,730 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:07,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:56:07,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:08,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:08,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:08,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545521705] [2021-03-10 21:56:08,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:08,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:08,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:08,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:08,165 INFO L87 Difference]: Start difference. First operand 212 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:09,221 INFO L93 Difference]: Finished difference Result 278 states and 583 transitions. [2021-03-10 21:56:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:56:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:09,223 INFO L225 Difference]: With dead ends: 278 [2021-03-10 21:56:09,223 INFO L226 Difference]: Without dead ends: 278 [2021-03-10 21:56:09,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1149.0ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:56:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-10 21:56:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 214. [2021-03-10 21:56:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2253521126760565) internal successors, (474), 213 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 474 transitions. [2021-03-10 21:56:09,226 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 474 transitions. Word has length 19 [2021-03-10 21:56:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:09,226 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 474 transitions. [2021-03-10 21:56:09,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 474 transitions. [2021-03-10 21:56:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:09,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:09,226 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:09,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2351,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:09,442 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:09,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:09,442 INFO L82 PathProgramCache]: Analyzing trace with hash -133839357, now seen corresponding path program 295 times [2021-03-10 21:56:09,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:09,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407300001] [2021-03-10 21:56:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:09,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407300001] [2021-03-10 21:56:09,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982357347] [2021-03-10 21:56:09,636 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:09,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:10,100 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:56:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:10,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:10,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:10,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448920283] [2021-03-10 21:56:10,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:10,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:10,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:10,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:10,274 INFO L87 Difference]: Start difference. First operand 214 states and 474 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:10,693 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 21:56:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:10,847 INFO L93 Difference]: Finished difference Result 241 states and 520 transitions. [2021-03-10 21:56:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:56:10,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:10,849 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:56:10,849 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:56:10,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1004.6ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:56:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:56:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 214. [2021-03-10 21:56:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-03-10 21:56:10,852 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-03-10 21:56:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:10,852 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-03-10 21:56:10,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-03-10 21:56:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:10,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:10,852 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:11,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2360,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:11,052 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2128186248, now seen corresponding path program 296 times [2021-03-10 21:56:11,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:11,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550139119] [2021-03-10 21:56:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:11,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550139119] [2021-03-10 21:56:11,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601962404] [2021-03-10 21:56:11,256 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:11,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:56:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:11,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:11,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:11,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678185656] [2021-03-10 21:56:11,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:11,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:11,691 INFO L87 Difference]: Start difference. First operand 214 states and 472 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:12,473 INFO L93 Difference]: Finished difference Result 254 states and 548 transitions. [2021-03-10 21:56:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:12,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:12,475 INFO L225 Difference]: With dead ends: 254 [2021-03-10 21:56:12,475 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 21:56:12,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 988.0ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:56:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 21:56:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 213. [2021-03-10 21:56:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-03-10 21:56:12,478 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-03-10 21:56:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:12,478 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-03-10 21:56:12,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-03-10 21:56:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:12,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:12,478 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:12,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2368 [2021-03-10 21:56:12,678 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:12,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1660434782, now seen corresponding path program 297 times [2021-03-10 21:56:12,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:12,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813857334] [2021-03-10 21:56:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:12,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813857334] [2021-03-10 21:56:12,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592331621] [2021-03-10 21:56:12,887 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:12,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:56:12,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:56:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:13,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:13,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:13,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220409781] [2021-03-10 21:56:13,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:13,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:13,317 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:13,616 INFO L93 Difference]: Finished difference Result 240 states and 518 transitions. [2021-03-10 21:56:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:56:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:13,618 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:56:13,618 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:56:13,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:56:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 210. [2021-03-10 21:56:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-03-10 21:56:13,620 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-03-10 21:56:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:13,621 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-03-10 21:56:13,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-03-10 21:56:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:13,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:13,621 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:13,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2373,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:13,822 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1443064199, now seen corresponding path program 298 times [2021-03-10 21:56:13,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:13,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769610456] [2021-03-10 21:56:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:14,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769610456] [2021-03-10 21:56:14,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65799566] [2021-03-10 21:56:14,009 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:14,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:56:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:14,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:14,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:14,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819203104] [2021-03-10 21:56:14,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:14,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:14,492 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:14,728 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:56:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:15,248 INFO L93 Difference]: Finished difference Result 229 states and 498 transitions. [2021-03-10 21:56:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:56:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:56:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:15,249 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:56:15,249 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:56:15,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 953.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:56:15,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:56:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2021-03-10 21:56:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-03-10 21:56:15,252 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-03-10 21:56:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:15,252 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-03-10 21:56:15,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-03-10 21:56:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:15,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:15,252 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:15,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2378,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:15,453 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:15,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024113, now seen corresponding path program 299 times [2021-03-10 21:56:15,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:15,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995391164] [2021-03-10 21:56:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:15,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995391164] [2021-03-10 21:56:15,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020009714] [2021-03-10 21:56:15,660 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:15,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:56:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:15,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:56:15,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:16,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:16,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:16,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310707255] [2021-03-10 21:56:16,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:16,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:16,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:16,111 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:17,155 INFO L93 Difference]: Finished difference Result 242 states and 524 transitions. [2021-03-10 21:56:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:17,156 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:56:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:17,157 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:56:17,157 INFO L226 Difference]: Without dead ends: 242 [2021-03-10 21:56:17,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1226.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:56:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-03-10 21:56:17,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2021-03-10 21:56:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-03-10 21:56:17,159 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-03-10 21:56:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:17,159 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-03-10 21:56:17,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-03-10 21:56:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:17,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:17,159 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:17,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2382 [2021-03-10 21:56:17,360 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:17,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1530947719, now seen corresponding path program 300 times [2021-03-10 21:56:17,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:17,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835964076] [2021-03-10 21:56:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:17,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835964076] [2021-03-10 21:56:17,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891501156] [2021-03-10 21:56:17,541 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:17,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:56:17,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:56:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:18,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:18,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:56:18,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852209055] [2021-03-10 21:56:18,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:56:18,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:18,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:56:18,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:56:18,033 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:18,390 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 21:56:18,541 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 21:56:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:19,235 INFO L93 Difference]: Finished difference Result 245 states and 530 transitions. [2021-03-10 21:56:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:56:19,236 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:19,236 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:56:19,237 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 21:56:19,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1367.3ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:56:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 21:56:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 211. [2021-03-10 21:56:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2) internal successors, (462), 210 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 462 transitions. [2021-03-10 21:56:19,239 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 462 transitions. Word has length 19 [2021-03-10 21:56:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:19,239 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 462 transitions. [2021-03-10 21:56:19,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 462 transitions. [2021-03-10 21:56:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:19,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:19,240 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:19,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2387,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:19,440 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:19,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1967283825, now seen corresponding path program 301 times [2021-03-10 21:56:19,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:19,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585755144] [2021-03-10 21:56:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:19,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585755144] [2021-03-10 21:56:19,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778173124] [2021-03-10 21:56:19,646 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:20,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:20,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:20,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588591098] [2021-03-10 21:56:20,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:20,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:20,105 INFO L87 Difference]: Start difference. First operand 211 states and 462 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:20,529 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 21:56:20,694 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 21:56:21,048 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:56:21,662 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:56:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:21,928 INFO L93 Difference]: Finished difference Result 281 states and 588 transitions. [2021-03-10 21:56:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:56:21,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:21,930 INFO L225 Difference]: With dead ends: 281 [2021-03-10 21:56:21,930 INFO L226 Difference]: Without dead ends: 281 [2021-03-10 21:56:21,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1929.5ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:56:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-10 21:56:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 212. [2021-03-10 21:56:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2085308056872037) internal successors, (466), 211 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 466 transitions. [2021-03-10 21:56:21,933 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 466 transitions. Word has length 19 [2021-03-10 21:56:21,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:21,933 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 466 transitions. [2021-03-10 21:56:21,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 466 transitions. [2021-03-10 21:56:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:21,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:21,933 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:22,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2392,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:22,134 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash -839887732, now seen corresponding path program 302 times [2021-03-10 21:56:22,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:22,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361684523] [2021-03-10 21:56:22,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:22,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361684523] [2021-03-10 21:56:22,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200170123] [2021-03-10 21:56:22,343 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:22,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:22,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:56:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:23,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:23,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:56:23,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637951197] [2021-03-10 21:56:23,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:56:23,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:56:23,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:56:23,081 INFO L87 Difference]: Start difference. First operand 212 states and 466 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:23,314 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:56:23,613 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 21:56:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:23,946 INFO L93 Difference]: Finished difference Result 238 states and 513 transitions. [2021-03-10 21:56:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:23,947 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:23,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:23,947 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:56:23,947 INFO L226 Difference]: Without dead ends: 236 [2021-03-10 21:56:23,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1252.5ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:56:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-03-10 21:56:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 212. [2021-03-10 21:56:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.203791469194313) internal successors, (465), 211 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 465 transitions. [2021-03-10 21:56:23,950 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 465 transitions. Word has length 19 [2021-03-10 21:56:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:23,950 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 465 transitions. [2021-03-10 21:56:23,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 465 transitions. [2021-03-10 21:56:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:23,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:23,950 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:24,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2401,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:24,151 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:24,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:24,151 INFO L82 PathProgramCache]: Analyzing trace with hash -425566935, now seen corresponding path program 303 times [2021-03-10 21:56:24,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:24,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339534680] [2021-03-10 21:56:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:24,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339534680] [2021-03-10 21:56:24,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890716634] [2021-03-10 21:56:24,352 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:24,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:56:24,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:24,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:24,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:24,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:24,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:24,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548382428] [2021-03-10 21:56:24,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:24,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:24,791 INFO L87 Difference]: Start difference. First operand 212 states and 465 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:25,364 INFO L93 Difference]: Finished difference Result 234 states and 509 transitions. [2021-03-10 21:56:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:56:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:56:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:25,366 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:56:25,366 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:56:25,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 668.3ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:56:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:56:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 212. [2021-03-10 21:56:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.203791469194313) internal successors, (465), 211 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 465 transitions. [2021-03-10 21:56:25,368 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 465 transitions. Word has length 19 [2021-03-10 21:56:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:25,368 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 465 transitions. [2021-03-10 21:56:25,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 465 transitions. [2021-03-10 21:56:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:25,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:25,369 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:25,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2409,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:25,569 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1496562399, now seen corresponding path program 304 times [2021-03-10 21:56:25,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:25,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814208177] [2021-03-10 21:56:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:25,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814208177] [2021-03-10 21:56:25,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796239870] [2021-03-10 21:56:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:25,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:25,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:25,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:26,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:26,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:26,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403791722] [2021-03-10 21:56:26,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:26,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:26,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:26,187 INFO L87 Difference]: Start difference. First operand 212 states and 465 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:27,116 INFO L93 Difference]: Finished difference Result 246 states and 533 transitions. [2021-03-10 21:56:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:56:27,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:56:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:27,118 INFO L225 Difference]: With dead ends: 246 [2021-03-10 21:56:27,118 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:56:27,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1141.9ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:56:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:56:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 212. [2021-03-10 21:56:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.203791469194313) internal successors, (465), 211 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 465 transitions. [2021-03-10 21:56:27,121 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 465 transitions. Word has length 19 [2021-03-10 21:56:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:27,121 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 465 transitions. [2021-03-10 21:56:27,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 465 transitions. [2021-03-10 21:56:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:27,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:27,121 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:27,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2414 [2021-03-10 21:56:27,331 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash -699826647, now seen corresponding path program 305 times [2021-03-10 21:56:27,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:27,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079812901] [2021-03-10 21:56:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:27,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079812901] [2021-03-10 21:56:27,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478819462] [2021-03-10 21:56:27,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:27,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:56:27,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:27,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:56:27,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:28,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:28,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:28,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324085741] [2021-03-10 21:56:28,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:28,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:28,011 INFO L87 Difference]: Start difference. First operand 212 states and 465 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:29,138 INFO L93 Difference]: Finished difference Result 252 states and 545 transitions. [2021-03-10 21:56:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:29,140 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:56:29,140 INFO L226 Difference]: Without dead ends: 252 [2021-03-10 21:56:29,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1299.8ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:56:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-03-10 21:56:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 212. [2021-03-10 21:56:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.203791469194313) internal successors, (465), 211 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 465 transitions. [2021-03-10 21:56:29,142 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 465 transitions. Word has length 19 [2021-03-10 21:56:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:29,142 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 465 transitions. [2021-03-10 21:56:29,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 465 transitions. [2021-03-10 21:56:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:29,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:29,143 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:29,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:29,343 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:29,344 INFO L82 PathProgramCache]: Analyzing trace with hash -412276412, now seen corresponding path program 306 times [2021-03-10 21:56:29,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:29,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594455265] [2021-03-10 21:56:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:29,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594455265] [2021-03-10 21:56:29,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662947583] [2021-03-10 21:56:29,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:29,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:56:29,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:56:29,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:30,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:30,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:56:30,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56098802] [2021-03-10 21:56:30,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:56:30,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:30,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:56:30,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:56:30,098 INFO L87 Difference]: Start difference. First operand 212 states and 465 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:30,792 INFO L93 Difference]: Finished difference Result 235 states and 511 transitions. [2021-03-10 21:56:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:56:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 [2021-03-10 21:56:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:30,793 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:56:30,793 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 21:56:30,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 935.6ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:56:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 21:56:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-03-10 21:56:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1980676328502415) internal successors, (455), 207 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 455 transitions. [2021-03-10 21:56:30,796 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 455 transitions. Word has length 19 [2021-03-10 21:56:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:30,796 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 455 transitions. [2021-03-10 21:56:30,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 455 transitions. [2021-03-10 21:56:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:30,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:30,796 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:30,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2428 [2021-03-10 21:56:30,997 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1315269959, now seen corresponding path program 307 times [2021-03-10 21:56:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:30,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110619023] [2021-03-10 21:56:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:31,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110619023] [2021-03-10 21:56:31,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17976769] [2021-03-10 21:56:31,281 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:31,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:31,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:31,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797739307] [2021-03-10 21:56:31,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:31,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:31,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:31,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:31,737 INFO L87 Difference]: Start difference. First operand 208 states and 455 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:32,389 INFO L93 Difference]: Finished difference Result 235 states and 509 transitions. [2021-03-10 21:56:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:56:32,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:56:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:32,392 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:56:32,392 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 21:56:32,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 871.6ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:56:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 21:56:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 210. [2021-03-10 21:56:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.1961722488038276) internal successors, (459), 209 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 459 transitions. [2021-03-10 21:56:32,394 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 459 transitions. Word has length 19 [2021-03-10 21:56:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:32,394 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 459 transitions. [2021-03-10 21:56:32,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 459 transitions. [2021-03-10 21:56:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:32,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:32,395 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:32,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:32,595 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2112005711, now seen corresponding path program 308 times [2021-03-10 21:56:32,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:32,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564739461] [2021-03-10 21:56:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:32,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564739461] [2021-03-10 21:56:32,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401088455] [2021-03-10 21:56:32,866 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:32,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:32,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:32,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:56:32,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:33,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:33,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:56:33,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052521493] [2021-03-10 21:56:33,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:56:33,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:33,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:56:33,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:56:33,356 INFO L87 Difference]: Start difference. First operand 210 states and 459 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:34,273 INFO L93 Difference]: Finished difference Result 247 states and 530 transitions. [2021-03-10 21:56:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:56:34,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:34,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:34,275 INFO L225 Difference]: With dead ends: 247 [2021-03-10 21:56:34,275 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 21:56:34,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1118.6ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:56:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 21:56:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 211. [2021-03-10 21:56:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2) internal successors, (462), 210 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 462 transitions. [2021-03-10 21:56:34,278 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 462 transitions. Word has length 19 [2021-03-10 21:56:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:34,278 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 462 transitions. [2021-03-10 21:56:34,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 462 transitions. [2021-03-10 21:56:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:34,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:34,278 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:34,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-03-10 21:56:34,478 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1055565492, now seen corresponding path program 309 times [2021-03-10 21:56:34,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:34,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503249206] [2021-03-10 21:56:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:34,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503249206] [2021-03-10 21:56:34,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930221078] [2021-03-10 21:56:34,726 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:34,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:56:34,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:34,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:56:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:35,197 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:56:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:35,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:35,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:35,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305462310] [2021-03-10 21:56:35,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:35,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:35,275 INFO L87 Difference]: Start difference. First operand 211 states and 462 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:35,795 INFO L93 Difference]: Finished difference Result 233 states and 503 transitions. [2021-03-10 21:56:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:35,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:35,797 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:56:35,797 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:56:35,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 925.0ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:56:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:56:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 209. [2021-03-10 21:56:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1971153846153846) internal successors, (457), 208 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 457 transitions. [2021-03-10 21:56:35,799 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 457 transitions. Word has length 19 [2021-03-10 21:56:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:35,799 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 457 transitions. [2021-03-10 21:56:35,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 457 transitions. [2021-03-10 21:56:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:35,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:35,800 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:36,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:36,000 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:36,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1676615319, now seen corresponding path program 310 times [2021-03-10 21:56:36,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:36,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84976677] [2021-03-10 21:56:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:36,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84976677] [2021-03-10 21:56:36,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278036218] [2021-03-10 21:56:36,256 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:36,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:36,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:36,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:36,782 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:56:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:36,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:36,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:36,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565514080] [2021-03-10 21:56:36,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:36,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:36,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:36,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:36,861 INFO L87 Difference]: Start difference. First operand 209 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:37,343 INFO L93 Difference]: Finished difference Result 230 states and 499 transitions. [2021-03-10 21:56:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:37,345 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:56:37,345 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 21:56:37,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 953.1ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:56:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 21:56:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 209. [2021-03-10 21:56:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1971153846153846) internal successors, (457), 208 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 457 transitions. [2021-03-10 21:56:37,347 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 457 transitions. Word has length 19 [2021-03-10 21:56:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:37,347 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 457 transitions. [2021-03-10 21:56:37,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 457 transitions. [2021-03-10 21:56:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:37,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:37,348 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:37,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2459,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:37,548 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:37,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1389065084, now seen corresponding path program 311 times [2021-03-10 21:56:37,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:37,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780915989] [2021-03-10 21:56:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:37,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780915989] [2021-03-10 21:56:37,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459980289] [2021-03-10 21:56:37,795 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:37,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:56:37,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:56:37,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:38,185 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:56:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:38,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:38,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:38,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092428110] [2021-03-10 21:56:38,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:38,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:38,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:38,521 INFO L87 Difference]: Start difference. First operand 209 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:38,935 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:56:39,328 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 21:56:39,537 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 21:56:39,820 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 21:56:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:39,966 INFO L93 Difference]: Finished difference Result 294 states and 611 transitions. [2021-03-10 21:56:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:56:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:39,968 INFO L225 Difference]: With dead ends: 294 [2021-03-10 21:56:39,968 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 21:56:39,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1745.7ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:56:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 21:56:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 212. [2021-03-10 21:56:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2085308056872037) internal successors, (466), 211 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 466 transitions. [2021-03-10 21:56:39,971 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 466 transitions. Word has length 19 [2021-03-10 21:56:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:39,971 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 466 transitions. [2021-03-10 21:56:39,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 466 transitions. [2021-03-10 21:56:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:39,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:39,972 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:40,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-03-10 21:56:40,172 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1087074804, now seen corresponding path program 312 times [2021-03-10 21:56:40,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:40,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986136991] [2021-03-10 21:56:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:40,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986136991] [2021-03-10 21:56:40,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115194440] [2021-03-10 21:56:40,435 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:40,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:56:40,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:40,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:40,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:40,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:40,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419631268] [2021-03-10 21:56:40,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:40,909 INFO L87 Difference]: Start difference. First operand 212 states and 466 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:41,490 INFO L93 Difference]: Finished difference Result 244 states and 526 transitions. [2021-03-10 21:56:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:56:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:41,492 INFO L225 Difference]: With dead ends: 244 [2021-03-10 21:56:41,492 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 21:56:41,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 885.7ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:56:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 21:56:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 208. [2021-03-10 21:56:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1980676328502415) internal successors, (455), 207 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 455 transitions. [2021-03-10 21:56:41,494 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 455 transitions. Word has length 19 [2021-03-10 21:56:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:41,494 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 455 transitions. [2021-03-10 21:56:41,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 455 transitions. [2021-03-10 21:56:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:41,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:41,495 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:41,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2474 [2021-03-10 21:56:41,695 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:41,695 INFO L82 PathProgramCache]: Analyzing trace with hash 210899919, now seen corresponding path program 313 times [2021-03-10 21:56:41,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:41,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962164863] [2021-03-10 21:56:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962164863] [2021-03-10 21:56:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374998081] [2021-03-10 21:56:41,932 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:41,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:41,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:42,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:42,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:42,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679625537] [2021-03-10 21:56:42,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:42,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:42,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:42,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:42,374 INFO L87 Difference]: Start difference. First operand 208 states and 455 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:42,807 INFO L93 Difference]: Finished difference Result 231 states and 501 transitions. [2021-03-10 21:56:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:56:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:42,809 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:56:42,809 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:56:42,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:56:42,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 209. [2021-03-10 21:56:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1971153846153846) internal successors, (457), 208 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 457 transitions. [2021-03-10 21:56:42,811 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 457 transitions. Word has length 19 [2021-03-10 21:56:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:42,811 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 457 transitions. [2021-03-10 21:56:42,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 457 transitions. [2021-03-10 21:56:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:42,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:42,812 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:43,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2479 [2021-03-10 21:56:43,027 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:43,027 INFO L82 PathProgramCache]: Analyzing trace with hash -860095545, now seen corresponding path program 314 times [2021-03-10 21:56:43,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:43,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214271814] [2021-03-10 21:56:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:43,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214271814] [2021-03-10 21:56:43,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009632056] [2021-03-10 21:56:43,260 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:43,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:43,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:43,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:43,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:43,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:43,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360860648] [2021-03-10 21:56:43,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:43,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:43,739 INFO L87 Difference]: Start difference. First operand 209 states and 457 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:44,434 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:56:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:44,754 INFO L93 Difference]: Finished difference Result 246 states and 531 transitions. [2021-03-10 21:56:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:56:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:44,756 INFO L225 Difference]: With dead ends: 246 [2021-03-10 21:56:44,756 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:56:44,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1122.9ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:56:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:56:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 210. [2021-03-10 21:56:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.1961722488038276) internal successors, (459), 209 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 459 transitions. [2021-03-10 21:56:44,758 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 459 transitions. Word has length 19 [2021-03-10 21:56:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:44,758 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 459 transitions. [2021-03-10 21:56:44,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 459 transitions. [2021-03-10 21:56:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:44,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:44,759 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:44,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2484,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:44,959 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:44,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:44,959 INFO L82 PathProgramCache]: Analyzing trace with hash -63359793, now seen corresponding path program 315 times [2021-03-10 21:56:44,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:44,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626028373] [2021-03-10 21:56:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:45,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626028373] [2021-03-10 21:56:45,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514018427] [2021-03-10 21:56:45,188 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:45,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:56:45,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:45,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:56:45,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:45,572 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:56:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:45,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:45,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:45,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249825367] [2021-03-10 21:56:45,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:45,873 INFO L87 Difference]: Start difference. First operand 210 states and 459 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:46,347 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:56:46,659 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 21:56:46,918 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 21:56:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:47,307 INFO L93 Difference]: Finished difference Result 252 states and 543 transitions. [2021-03-10 21:56:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:56:47,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:56:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:47,309 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:56:47,309 INFO L226 Difference]: Without dead ends: 252 [2021-03-10 21:56:47,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1787.9ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:56:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-03-10 21:56:47,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 211. [2021-03-10 21:56:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1952380952380954) internal successors, (461), 210 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 461 transitions. [2021-03-10 21:56:47,311 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 461 transitions. Word has length 19 [2021-03-10 21:56:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:47,311 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 461 transitions. [2021-03-10 21:56:47,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 461 transitions. [2021-03-10 21:56:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:47,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:47,312 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:47,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2489,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:47,512 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:47,512 INFO L82 PathProgramCache]: Analyzing trace with hash 224190442, now seen corresponding path program 316 times [2021-03-10 21:56:47,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:47,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360439358] [2021-03-10 21:56:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:47,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360439358] [2021-03-10 21:56:47,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236718485] [2021-03-10 21:56:47,732 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:47,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:47,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:48,153 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:56:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:48,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:48,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:48,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256095445] [2021-03-10 21:56:48,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:48,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:48,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:48,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:48,339 INFO L87 Difference]: Start difference. First operand 211 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:48,941 INFO L93 Difference]: Finished difference Result 233 states and 505 transitions. [2021-03-10 21:56:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:56:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:48,943 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:56:48,943 INFO L226 Difference]: Without dead ends: 233 [2021-03-10 21:56:48,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 964.6ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:56:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-03-10 21:56:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 208. [2021-03-10 21:56:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1980676328502415) internal successors, (455), 207 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 455 transitions. [2021-03-10 21:56:48,946 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 455 transitions. Word has length 19 [2021-03-10 21:56:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:48,946 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 455 transitions. [2021-03-10 21:56:48,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 455 transitions. [2021-03-10 21:56:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:48,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:48,946 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:49,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2496 [2021-03-10 21:56:49,147 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:49,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:49,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1951736813, now seen corresponding path program 317 times [2021-03-10 21:56:49,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:49,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737273271] [2021-03-10 21:56:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:49,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737273271] [2021-03-10 21:56:49,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334762636] [2021-03-10 21:56:49,426 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:49,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:56:49,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:49,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:49,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129998551] [2021-03-10 21:56:49,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:49,910 INFO L87 Difference]: Start difference. First operand 208 states and 455 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:50,244 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:56:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:50,408 INFO L93 Difference]: Finished difference Result 233 states and 505 transitions. [2021-03-10 21:56:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:56:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:50,410 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:56:50,410 INFO L226 Difference]: Without dead ends: 233 [2021-03-10 21:56:50,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 825.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:56:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-03-10 21:56:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 208. [2021-03-10 21:56:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1980676328502415) internal successors, (455), 207 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 455 transitions. [2021-03-10 21:56:50,412 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 455 transitions. Word has length 19 [2021-03-10 21:56:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:50,412 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 455 transitions. [2021-03-10 21:56:50,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 455 transitions. [2021-03-10 21:56:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:50,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:50,413 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:50,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2504,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:50,613 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:50,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:50,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1546494731, now seen corresponding path program 318 times [2021-03-10 21:56:50,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:50,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751643611] [2021-03-10 21:56:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:50,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751643611] [2021-03-10 21:56:50,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227323835] [2021-03-10 21:56:50,893 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:50,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:56:50,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:50,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:56:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:51,502 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:56:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:51,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:51,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:51,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470768147] [2021-03-10 21:56:51,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:51,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:51,630 INFO L87 Difference]: Start difference. First operand 208 states and 455 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:52,074 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:56:52,230 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 21:56:52,553 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:56:52,734 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 21:56:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:52,967 INFO L93 Difference]: Finished difference Result 250 states and 534 transitions. [2021-03-10 21:56:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:56:52,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:56:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:52,968 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:56:52,968 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:56:52,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1703.1ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:56:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:56:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208. [2021-03-10 21:56:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1932367149758454) internal successors, (454), 207 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 454 transitions. [2021-03-10 21:56:52,970 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 454 transitions. Word has length 19 [2021-03-10 21:56:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:52,971 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 454 transitions. [2021-03-10 21:56:52,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 454 transitions. [2021-03-10 21:56:52,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:52,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:52,971 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:53,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2509 [2021-03-10 21:56:53,171 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash -419098638, now seen corresponding path program 319 times [2021-03-10 21:56:53,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:53,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857601838] [2021-03-10 21:56:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:53,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857601838] [2021-03-10 21:56:53,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174401901] [2021-03-10 21:56:53,450 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:53,884 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:56:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:53,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:53,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:53,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027392933] [2021-03-10 21:56:53,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:53,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:53,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:53,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:53,960 INFO L87 Difference]: Start difference. First operand 208 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:54,585 INFO L93 Difference]: Finished difference Result 230 states and 495 transitions. [2021-03-10 21:56:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:56:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:54,586 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:56:54,586 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:56:54,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1030.4ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:56:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:56:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 206. [2021-03-10 21:56:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.1902439024390246) internal successors, (449), 205 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 449 transitions. [2021-03-10 21:56:54,588 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 449 transitions. Word has length 19 [2021-03-10 21:56:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:54,588 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 449 transitions. [2021-03-10 21:56:54,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 449 transitions. [2021-03-10 21:56:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:54,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:54,589 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:54,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2516,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:54,789 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:54,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1040148465, now seen corresponding path program 320 times [2021-03-10 21:56:54,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:54,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671138706] [2021-03-10 21:56:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:55,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671138706] [2021-03-10 21:56:55,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450943138] [2021-03-10 21:56:55,042 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:55,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:56:55,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:55,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:56:55,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:55,320 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:56:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:55,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:55,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:55,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647877032] [2021-03-10 21:56:55,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:55,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:55,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:55,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:55,658 INFO L87 Difference]: Start difference. First operand 206 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:56,131 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-03-10 21:56:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:56,260 INFO L93 Difference]: Finished difference Result 234 states and 501 transitions. [2021-03-10 21:56:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:56:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:56:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:56,261 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:56:56,261 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:56:56,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 919.1ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:56:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:56:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 206. [2021-03-10 21:56:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.1902439024390246) internal successors, (449), 205 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 449 transitions. [2021-03-10 21:56:56,264 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 449 transitions. Word has length 19 [2021-03-10 21:56:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:56,264 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 449 transitions. [2021-03-10 21:56:56,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 449 transitions. [2021-03-10 21:56:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:56,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:56,264 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:56,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2524,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:56,464 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -752598230, now seen corresponding path program 321 times [2021-03-10 21:56:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:56,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93547076] [2021-03-10 21:56:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:56,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93547076] [2021-03-10 21:56:56,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685454888] [2021-03-10 21:56:56,730 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:56,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:56:56,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:56,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:56:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:57,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:57,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:56:57,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960128424] [2021-03-10 21:56:57,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:56:57,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:56:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:56:57,176 INFO L87 Difference]: Start difference. First operand 206 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:57,780 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 21:56:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:57,961 INFO L93 Difference]: Finished difference Result 295 states and 611 transitions. [2021-03-10 21:56:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:56:57,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:57,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:57,963 INFO L225 Difference]: With dead ends: 295 [2021-03-10 21:56:57,963 INFO L226 Difference]: Without dead ends: 295 [2021-03-10 21:56:57,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 899.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:56:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-03-10 21:56:57,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 209. [2021-03-10 21:56:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.201923076923077) internal successors, (458), 208 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 458 transitions. [2021-03-10 21:56:57,965 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 458 transitions. Word has length 19 [2021-03-10 21:56:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:57,966 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 458 transitions. [2021-03-10 21:56:57,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 458 transitions. [2021-03-10 21:56:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:57,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:57,966 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:58,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2531 [2021-03-10 21:56:58,166 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:58,167 INFO L82 PathProgramCache]: Analyzing trace with hash -450607950, now seen corresponding path program 322 times [2021-03-10 21:56:58,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:58,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284473566] [2021-03-10 21:56:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:58,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284473566] [2021-03-10 21:56:58,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393069794] [2021-03-10 21:56:58,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:58,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:56:58,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:56:58,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:58,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:58,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:56:58,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831437234] [2021-03-10 21:56:58,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:56:58,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:58,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:56:58,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:56:58,975 INFO L87 Difference]: Start difference. First operand 209 states and 458 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:59,432 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-03-10 21:56:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:56:59,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:56:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:59,433 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:56:59,433 INFO L226 Difference]: Without dead ends: 241 [2021-03-10 21:56:59,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 778.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:56:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-03-10 21:56:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 204. [2021-03-10 21:56:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1921182266009853) internal successors, (445), 203 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 445 transitions. [2021-03-10 21:56:59,436 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 445 transitions. Word has length 19 [2021-03-10 21:56:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:59,436 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 445 transitions. [2021-03-10 21:56:59,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 445 transitions. [2021-03-10 21:56:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:56:59,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:59,436 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:59,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2540 [2021-03-10 21:56:59,636 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1075773305, now seen corresponding path program 323 times [2021-03-10 21:56:59,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:59,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379055182] [2021-03-10 21:56:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379055182] [2021-03-10 21:56:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546895138] [2021-03-10 21:56:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:59,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:56:59,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:56:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:00,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:00,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:00,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419620268] [2021-03-10 21:57:00,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:00,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:00,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:00,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:00,355 INFO L87 Difference]: Start difference. First operand 204 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:00,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:00,932 INFO L93 Difference]: Finished difference Result 240 states and 517 transitions. [2021-03-10 21:57:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:00,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:00,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:00,934 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:57:00,934 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:57:00,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 741.9ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:57:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:57:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 206. [2021-03-10 21:57:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.1902439024390246) internal successors, (449), 205 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 449 transitions. [2021-03-10 21:57:00,936 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 449 transitions. Word has length 19 [2021-03-10 21:57:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:00,936 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 449 transitions. [2021-03-10 21:57:00,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 449 transitions. [2021-03-10 21:57:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:00,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:00,936 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:01,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-03-10 21:57:01,137 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:01,137 INFO L82 PathProgramCache]: Analyzing trace with hash -279037553, now seen corresponding path program 324 times [2021-03-10 21:57:01,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:01,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100807391] [2021-03-10 21:57:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:01,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100807391] [2021-03-10 21:57:01,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199791941] [2021-03-10 21:57:01,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:01,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:57:01,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:01,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:01,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:01,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:01,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129681167] [2021-03-10 21:57:01,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:01,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:01,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:01,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:01,861 INFO L87 Difference]: Start difference. First operand 206 states and 449 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:02,544 INFO L93 Difference]: Finished difference Result 251 states and 539 transitions. [2021-03-10 21:57:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:57:02,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:02,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:02,546 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:57:02,546 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:57:02,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 855.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:57:02,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:57:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 207. [2021-03-10 21:57:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1893203883495147) internal successors, (451), 206 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 451 transitions. [2021-03-10 21:57:02,548 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 451 transitions. Word has length 19 [2021-03-10 21:57:02,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:02,548 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 451 transitions. [2021-03-10 21:57:02,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 451 transitions. [2021-03-10 21:57:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:02,548 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:02,548 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:02,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:02,749 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:02,749 INFO L82 PathProgramCache]: Analyzing trace with hash 8512682, now seen corresponding path program 325 times [2021-03-10 21:57:02,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:02,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780437586] [2021-03-10 21:57:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:03,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780437586] [2021-03-10 21:57:03,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606328799] [2021-03-10 21:57:03,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:03,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:03,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:03,527 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:57:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:03,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:03,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:03,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360994225] [2021-03-10 21:57:03,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:03,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:03,614 INFO L87 Difference]: Start difference. First operand 207 states and 451 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:04,302 INFO L93 Difference]: Finished difference Result 231 states and 498 transitions. [2021-03-10 21:57:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:04,304 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:57:04,304 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:57:04,304 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1025.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:57:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:57:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 205. [2021-03-10 21:57:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1911764705882355) internal successors, (447), 204 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 447 transitions. [2021-03-10 21:57:04,306 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 447 transitions. Word has length 19 [2021-03-10 21:57:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:04,306 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 447 transitions. [2021-03-10 21:57:04,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 447 transitions. [2021-03-10 21:57:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:04,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:04,306 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:04,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2558 [2021-03-10 21:57:04,507 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:04,507 INFO L82 PathProgramCache]: Analyzing trace with hash 227308713, now seen corresponding path program 326 times [2021-03-10 21:57:04,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:04,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586197675] [2021-03-10 21:57:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:04,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586197675] [2021-03-10 21:57:04,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749747709] [2021-03-10 21:57:04,811 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:04,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:57:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:05,490 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:57:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:05,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:05,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:05,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230473440] [2021-03-10 21:57:05,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:05,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:05,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:05,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:05,569 INFO L87 Difference]: Start difference. First operand 205 states and 447 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:06,398 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 21:57:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:06,471 INFO L93 Difference]: Finished difference Result 233 states and 499 transitions. [2021-03-10 21:57:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:57:06,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:06,473 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:57:06,473 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 21:57:06,473 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1466.8ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:57:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 21:57:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 205. [2021-03-10 21:57:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1911764705882355) internal successors, (447), 204 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 447 transitions. [2021-03-10 21:57:06,475 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 447 transitions. Word has length 19 [2021-03-10 21:57:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:06,475 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 447 transitions. [2021-03-10 21:57:06,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 447 transitions. [2021-03-10 21:57:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:06,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:06,475 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:06,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-03-10 21:57:06,676 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:06,676 INFO L82 PathProgramCache]: Analyzing trace with hash 514858948, now seen corresponding path program 327 times [2021-03-10 21:57:06,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:06,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239907691] [2021-03-10 21:57:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:06,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239907691] [2021-03-10 21:57:06,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714174748] [2021-03-10 21:57:06,951 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:06,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:57:06,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:57:06,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:07,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:07,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:07,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722516511] [2021-03-10 21:57:07,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:07,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:07,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:07,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:07,386 INFO L87 Difference]: Start difference. First operand 205 states and 447 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:08,484 INFO L93 Difference]: Finished difference Result 294 states and 608 transitions. [2021-03-10 21:57:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:57:08,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:08,486 INFO L225 Difference]: With dead ends: 294 [2021-03-10 21:57:08,486 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 21:57:08,486 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1234.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:57:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 21:57:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 208. [2021-03-10 21:57:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2028985507246377) internal successors, (456), 207 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 456 transitions. [2021-03-10 21:57:08,488 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 456 transitions. Word has length 19 [2021-03-10 21:57:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:08,488 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 456 transitions. [2021-03-10 21:57:08,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 456 transitions. [2021-03-10 21:57:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:08,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:08,489 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:08,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2572,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:08,689 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash 816849228, now seen corresponding path program 328 times [2021-03-10 21:57:08,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:08,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711177004] [2021-03-10 21:57:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:08,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711177004] [2021-03-10 21:57:08,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052753584] [2021-03-10 21:57:08,956 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:08,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:08,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:57:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:09,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:09,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:09,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631477145] [2021-03-10 21:57:09,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:09,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:09,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:09,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:09,567 INFO L87 Difference]: Start difference. First operand 208 states and 456 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:10,058 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 21:57:10,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:10,269 INFO L93 Difference]: Finished difference Result 242 states and 520 transitions. [2021-03-10 21:57:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:57:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:10,271 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:57:10,271 INFO L226 Difference]: Without dead ends: 242 [2021-03-10 21:57:10,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1091.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:57:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-03-10 21:57:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 204. [2021-03-10 21:57:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1921182266009853) internal successors, (445), 203 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 445 transitions. [2021-03-10 21:57:10,273 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 445 transitions. Word has length 19 [2021-03-10 21:57:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:10,273 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 445 transitions. [2021-03-10 21:57:10,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 445 transitions. [2021-03-10 21:57:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:10,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:10,273 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:10,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:10,483 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2095672083, now seen corresponding path program 329 times [2021-03-10 21:57:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:10,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393752674] [2021-03-10 21:57:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:10,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393752674] [2021-03-10 21:57:10,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544325078] [2021-03-10 21:57:10,723 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:10,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:57:10,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:57:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:11,265 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:57:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:11,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:11,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:11,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726762150] [2021-03-10 21:57:11,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:11,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:11,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:11,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:11,445 INFO L87 Difference]: Start difference. First operand 204 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:12,409 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 21:57:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:12,637 INFO L93 Difference]: Finished difference Result 257 states and 541 transitions. [2021-03-10 21:57:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:57:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:12,640 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:57:12,640 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 21:57:12,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1512.0ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:57:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 21:57:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 202. [2021-03-10 21:57:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-03-10 21:57:12,642 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 19 [2021-03-10 21:57:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:12,642 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-03-10 21:57:12,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-03-10 21:57:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:12,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:12,642 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:12,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2585 [2021-03-10 21:57:12,843 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:12,843 INFO L82 PathProgramCache]: Analyzing trace with hash -128430132, now seen corresponding path program 330 times [2021-03-10 21:57:12,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:12,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67065833] [2021-03-10 21:57:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:13,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67065833] [2021-03-10 21:57:13,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401749862] [2021-03-10 21:57:13,058 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:13,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:57:13,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:57:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:13,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:13,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:13,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930837514] [2021-03-10 21:57:13,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:13,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:13,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:13,554 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:14,264 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:57:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:14,990 INFO L93 Difference]: Finished difference Result 294 states and 608 transitions. [2021-03-10 21:57:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:57:14,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:14,991 INFO L225 Difference]: With dead ends: 294 [2021-03-10 21:57:14,991 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 21:57:14,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1453.7ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:57:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 21:57:14,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 204. [2021-03-10 21:57:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1921182266009853) internal successors, (445), 203 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 445 transitions. [2021-03-10 21:57:14,994 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 445 transitions. Word has length 19 [2021-03-10 21:57:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:14,994 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 445 transitions. [2021-03-10 21:57:14,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 445 transitions. [2021-03-10 21:57:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:14,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:14,994 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:15,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2592,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:15,195 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:15,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1366655981, now seen corresponding path program 331 times [2021-03-10 21:57:15,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:15,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911111966] [2021-03-10 21:57:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:15,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911111966] [2021-03-10 21:57:15,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110322913] [2021-03-10 21:57:15,419 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:15,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:15,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:15,900 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:57:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:16,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:16,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:16,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939470744] [2021-03-10 21:57:16,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:16,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:16,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:16,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:16,103 INFO L87 Difference]: Start difference. First operand 204 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:16,541 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 21:57:16,807 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 21:57:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:17,017 INFO L93 Difference]: Finished difference Result 228 states and 487 transitions. [2021-03-10 21:57:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:57:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:17,018 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:57:17,018 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:57:17,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1318.0ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:57:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:57:17,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2021-03-10 21:57:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1822660098522166) internal successors, (443), 203 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 443 transitions. [2021-03-10 21:57:17,020 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 443 transitions. Word has length 19 [2021-03-10 21:57:17,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:17,020 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 443 transitions. [2021-03-10 21:57:17,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:17,020 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 443 transitions. [2021-03-10 21:57:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:17,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:17,020 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:17,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2601 [2021-03-10 21:57:17,221 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash -666285710, now seen corresponding path program 332 times [2021-03-10 21:57:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:17,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607157520] [2021-03-10 21:57:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:17,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607157520] [2021-03-10 21:57:17,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682896489] [2021-03-10 21:57:17,456 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:17,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:17,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:17,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:17,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:17,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:17,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:17,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545018815] [2021-03-10 21:57:17,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:17,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:17,935 INFO L87 Difference]: Start difference. First operand 204 states and 443 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:18,651 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:57:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:19,059 INFO L93 Difference]: Finished difference Result 246 states and 525 transitions. [2021-03-10 21:57:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:57:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:19,061 INFO L225 Difference]: With dead ends: 246 [2021-03-10 21:57:19,061 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:57:19,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1220.6ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:57:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:57:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2021-03-10 21:57:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1831683168316833) internal successors, (441), 202 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 441 transitions. [2021-03-10 21:57:19,063 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 441 transitions. Word has length 19 [2021-03-10 21:57:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:19,063 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 441 transitions. [2021-03-10 21:57:19,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 441 transitions. [2021-03-10 21:57:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:19,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:19,063 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:19,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:19,264 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash -159939444, now seen corresponding path program 333 times [2021-03-10 21:57:19,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:19,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224823708] [2021-03-10 21:57:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:19,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224823708] [2021-03-10 21:57:19,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303866557] [2021-03-10 21:57:19,495 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:19,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:57:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:57:19,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:20,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:20,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:20,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035123901] [2021-03-10 21:57:20,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:20,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:20,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:20,029 INFO L87 Difference]: Start difference. First operand 203 states and 441 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:20,779 INFO L93 Difference]: Finished difference Result 240 states and 511 transitions. [2021-03-10 21:57:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:20,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:20,781 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:57:20,781 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:57:20,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 832.6ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:57:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:57:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 198. [2021-03-10 21:57:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.16751269035533) internal successors, (427), 197 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 427 transitions. [2021-03-10 21:57:20,783 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 427 transitions. Word has length 19 [2021-03-10 21:57:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:20,783 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 427 transitions. [2021-03-10 21:57:20,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 427 transitions. [2021-03-10 21:57:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:20,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:20,783 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:20,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2614,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:20,983 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1533464087, now seen corresponding path program 334 times [2021-03-10 21:57:20,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:20,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11761617] [2021-03-10 21:57:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:21,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11761617] [2021-03-10 21:57:21,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192508022] [2021-03-10 21:57:21,219 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:21,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:21,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:21,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:21,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:21,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:21,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:21,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195147868] [2021-03-10 21:57:21,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:21,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:21,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:21,725 INFO L87 Difference]: Start difference. First operand 198 states and 427 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:22,203 INFO L93 Difference]: Finished difference Result 221 states and 473 transitions. [2021-03-10 21:57:22,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:22,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:22,205 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:57:22,205 INFO L226 Difference]: Without dead ends: 221 [2021-03-10 21:57:22,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-03-10 21:57:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 199. [2021-03-10 21:57:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1666666666666665) internal successors, (429), 198 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 429 transitions. [2021-03-10 21:57:22,207 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 429 transitions. Word has length 19 [2021-03-10 21:57:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:22,207 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 429 transitions. [2021-03-10 21:57:22,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 429 transitions. [2021-03-10 21:57:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:22,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:22,207 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:22,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2618,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:22,407 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:22,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1690507745, now seen corresponding path program 335 times [2021-03-10 21:57:22,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:22,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921184874] [2021-03-10 21:57:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:22,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921184874] [2021-03-10 21:57:22,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168114963] [2021-03-10 21:57:22,649 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:22,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:57:22,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:22,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:23,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:23,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:23,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234720376] [2021-03-10 21:57:23,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:23,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:23,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:23,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:23,145 INFO L87 Difference]: Start difference. First operand 199 states and 429 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:23,869 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:57:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:24,181 INFO L93 Difference]: Finished difference Result 237 states and 505 transitions. [2021-03-10 21:57:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:24,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:24,183 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:57:24,183 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:57:24,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1124.4ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:57:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:57:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 200. [2021-03-10 21:57:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1658291457286434) internal successors, (431), 199 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 431 transitions. [2021-03-10 21:57:24,185 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 431 transitions. Word has length 19 [2021-03-10 21:57:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:24,186 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 431 transitions. [2021-03-10 21:57:24,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 431 transitions. [2021-03-10 21:57:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:24,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:24,186 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:24,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2623,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:24,386 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1807723799, now seen corresponding path program 336 times [2021-03-10 21:57:24,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:24,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513783452] [2021-03-10 21:57:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:24,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513783452] [2021-03-10 21:57:24,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846291923] [2021-03-10 21:57:24,602 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:24,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:57:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:25,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:25,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:25,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743838084] [2021-03-10 21:57:25,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:25,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:25,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:25,086 INFO L87 Difference]: Start difference. First operand 200 states and 431 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:25,880 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:57:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:26,188 INFO L93 Difference]: Finished difference Result 249 states and 529 transitions. [2021-03-10 21:57:26,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:57:26,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:26,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:26,190 INFO L225 Difference]: With dead ends: 249 [2021-03-10 21:57:26,190 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:57:26,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1132.0ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:57:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:57:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 201. [2021-03-10 21:57:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.165) internal successors, (433), 200 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 433 transitions. [2021-03-10 21:57:26,192 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 433 transitions. Word has length 19 [2021-03-10 21:57:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:26,192 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 433 transitions. [2021-03-10 21:57:26,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 433 transitions. [2021-03-10 21:57:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:26,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:26,192 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:26,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2628,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:26,393 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:26,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1520173564, now seen corresponding path program 337 times [2021-03-10 21:57:26,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:26,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609548929] [2021-03-10 21:57:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:26,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609548929] [2021-03-10 21:57:26,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250434204] [2021-03-10 21:57:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:27,012 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:57:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:27,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:27,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:27,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417732864] [2021-03-10 21:57:27,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:27,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:27,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:27,195 INFO L87 Difference]: Start difference. First operand 201 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:27,785 INFO L93 Difference]: Finished difference Result 228 states and 487 transitions. [2021-03-10 21:57:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:27,786 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:57:27,786 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:57:27,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 821.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:57:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:57:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 198. [2021-03-10 21:57:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.16751269035533) internal successors, (427), 197 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 427 transitions. [2021-03-10 21:57:27,788 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 427 transitions. Word has length 19 [2021-03-10 21:57:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:27,789 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 427 transitions. [2021-03-10 21:57:27,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 427 transitions. [2021-03-10 21:57:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:27,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:27,789 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:27,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2637 [2021-03-10 21:57:27,989 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash 207372807, now seen corresponding path program 338 times [2021-03-10 21:57:27,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:27,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871333622] [2021-03-10 21:57:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:28,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871333622] [2021-03-10 21:57:28,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988187392] [2021-03-10 21:57:28,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:28,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:28,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:28,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:57:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:28,712 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:57:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:29,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:29,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:29,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017568598] [2021-03-10 21:57:29,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:29,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:29,035 INFO L87 Difference]: Start difference. First operand 198 states and 427 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:29,509 INFO L93 Difference]: Finished difference Result 226 states and 483 transitions. [2021-03-10 21:57:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:29,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:29,511 INFO L225 Difference]: With dead ends: 226 [2021-03-10 21:57:29,511 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:57:29,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 955.7ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:57:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 200. [2021-03-10 21:57:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1658291457286434) internal successors, (431), 199 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 431 transitions. [2021-03-10 21:57:29,513 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 431 transitions. Word has length 19 [2021-03-10 21:57:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:29,514 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 431 transitions. [2021-03-10 21:57:29,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 431 transitions. [2021-03-10 21:57:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:29,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:29,514 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:29,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2645 [2021-03-10 21:57:29,714 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1004108559, now seen corresponding path program 339 times [2021-03-10 21:57:29,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:29,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667946092] [2021-03-10 21:57:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:29,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667946092] [2021-03-10 21:57:29,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52736983] [2021-03-10 21:57:29,987 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:30,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:57:30,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:57:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:30,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:30,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:30,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435117432] [2021-03-10 21:57:30,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:30,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:30,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:30,503 INFO L87 Difference]: Start difference. First operand 200 states and 431 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:31,478 INFO L93 Difference]: Finished difference Result 250 states and 528 transitions. [2021-03-10 21:57:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:57:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:57:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:31,480 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:57:31,480 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:57:31,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1166.5ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:57:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:57:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 201. [2021-03-10 21:57:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.17) internal successors, (434), 200 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 434 transitions. [2021-03-10 21:57:31,482 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 434 transitions. Word has length 19 [2021-03-10 21:57:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:31,482 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 434 transitions. [2021-03-10 21:57:31,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 434 transitions. [2021-03-10 21:57:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:31,482 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:31,482 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:31,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2648 [2021-03-10 21:57:31,698 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2131504652, now seen corresponding path program 340 times [2021-03-10 21:57:31,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:31,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006479016] [2021-03-10 21:57:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:31,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006479016] [2021-03-10 21:57:31,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671942622] [2021-03-10 21:57:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:32,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:32,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:32,480 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:57:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:32,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:32,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:32,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071655058] [2021-03-10 21:57:32,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:32,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:32,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:32,565 INFO L87 Difference]: Start difference. First operand 201 states and 434 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:33,349 INFO L93 Difference]: Finished difference Result 229 states and 487 transitions. [2021-03-10 21:57:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:57:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:33,350 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:57:33,350 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 21:57:33,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1109.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:57:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 21:57:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 199. [2021-03-10 21:57:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1666666666666665) internal successors, (429), 198 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 429 transitions. [2021-03-10 21:57:33,352 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 429 transitions. Word has length 19 [2021-03-10 21:57:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:33,352 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 429 transitions. [2021-03-10 21:57:33,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 429 transitions. [2021-03-10 21:57:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:33,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:33,353 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:33,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2657 [2021-03-10 21:57:33,553 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1510454825, now seen corresponding path program 341 times [2021-03-10 21:57:33,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:33,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414974337] [2021-03-10 21:57:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:33,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414974337] [2021-03-10 21:57:33,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615051431] [2021-03-10 21:57:33,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:33,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:57:33,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:33,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:34,388 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:57:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:34,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:34,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:34,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152714658] [2021-03-10 21:57:34,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:34,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:34,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:34,471 INFO L87 Difference]: Start difference. First operand 199 states and 429 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:35,048 INFO L93 Difference]: Finished difference Result 221 states and 473 transitions. [2021-03-10 21:57:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:35,050 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:57:35,050 INFO L226 Difference]: Without dead ends: 221 [2021-03-10 21:57:35,050 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1021.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:57:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-03-10 21:57:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 199. [2021-03-10 21:57:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1666666666666665) internal successors, (429), 198 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 429 transitions. [2021-03-10 21:57:35,052 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 429 transitions. Word has length 19 [2021-03-10 21:57:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:35,052 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 429 transitions. [2021-03-10 21:57:35,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 429 transitions. [2021-03-10 21:57:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:35,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:35,052 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:35,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2665,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:35,268 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:35,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:35,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1798005060, now seen corresponding path program 342 times [2021-03-10 21:57:35,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:35,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975852229] [2021-03-10 21:57:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:35,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975852229] [2021-03-10 21:57:35,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835296629] [2021-03-10 21:57:35,547 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:35,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:57:35,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:35,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:57:35,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:35,864 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:57:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:36,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:36,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:36,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775209510] [2021-03-10 21:57:36,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:36,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:36,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:36,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:36,170 INFO L87 Difference]: Start difference. First operand 199 states and 429 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:36,722 INFO L93 Difference]: Finished difference Result 268 states and 563 transitions. [2021-03-10 21:57:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:57:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:36,724 INFO L225 Difference]: With dead ends: 268 [2021-03-10 21:57:36,724 INFO L226 Difference]: Without dead ends: 268 [2021-03-10 21:57:36,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 899.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:57:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-03-10 21:57:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 202. [2021-03-10 21:57:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1791044776119404) internal successors, (438), 201 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 438 transitions. [2021-03-10 21:57:36,726 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 438 transitions. Word has length 19 [2021-03-10 21:57:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:36,726 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 438 transitions. [2021-03-10 21:57:36,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 438 transitions. [2021-03-10 21:57:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:36,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:36,726 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:36,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2673 [2021-03-10 21:57:36,927 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2099995340, now seen corresponding path program 343 times [2021-03-10 21:57:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:36,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315563207] [2021-03-10 21:57:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:37,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315563207] [2021-03-10 21:57:37,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656413863] [2021-03-10 21:57:37,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:37,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:37,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:37,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:37,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409378327] [2021-03-10 21:57:37,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:37,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:37,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:37,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:37,676 INFO L87 Difference]: Start difference. First operand 202 states and 438 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:38,287 INFO L93 Difference]: Finished difference Result 240 states and 511 transitions. [2021-03-10 21:57:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:57:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:38,289 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:57:38,289 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:57:38,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:57:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:57:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 197. [2021-03-10 21:57:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1683673469387754) internal successors, (425), 196 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 425 transitions. [2021-03-10 21:57:38,291 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 425 transitions. Word has length 19 [2021-03-10 21:57:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:38,291 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 425 transitions. [2021-03-10 21:57:38,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 425 transitions. [2021-03-10 21:57:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:38,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:38,291 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:38,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:38,507 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:38,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1474829985, now seen corresponding path program 344 times [2021-03-10 21:57:38,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:38,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444601080] [2021-03-10 21:57:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:38,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444601080] [2021-03-10 21:57:38,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422757610] [2021-03-10 21:57:38,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:38,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:38,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:57:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:39,345 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:57:39,505 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:57:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:39,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:39,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091036803] [2021-03-10 21:57:39,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:39,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:39,681 INFO L87 Difference]: Start difference. First operand 197 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:40,212 INFO L93 Difference]: Finished difference Result 224 states and 479 transitions. [2021-03-10 21:57:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:57:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:40,214 INFO L225 Difference]: With dead ends: 224 [2021-03-10 21:57:40,214 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:57:40,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1018.7ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:57:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-03-10 21:57:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1683673469387754) internal successors, (425), 196 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 425 transitions. [2021-03-10 21:57:40,217 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 425 transitions. Word has length 19 [2021-03-10 21:57:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:40,217 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 425 transitions. [2021-03-10 21:57:40,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 425 transitions. [2021-03-10 21:57:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:40,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:40,217 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:40,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2685 [2021-03-10 21:57:40,418 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:40,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:40,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2023401559, now seen corresponding path program 345 times [2021-03-10 21:57:40,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:40,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183645380] [2021-03-10 21:57:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:40,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183645380] [2021-03-10 21:57:40,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118210000] [2021-03-10 21:57:40,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:40,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:57:40,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:40,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:57:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:41,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:41,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952189394] [2021-03-10 21:57:41,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:41,424 INFO L87 Difference]: Start difference. First operand 197 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:41,796 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:57:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:42,198 INFO L93 Difference]: Finished difference Result 238 states and 507 transitions. [2021-03-10 21:57:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:57:42,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:42,200 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:57:42,200 INFO L226 Difference]: Without dead ends: 238 [2021-03-10 21:57:42,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1108.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:57:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-03-10 21:57:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 197. [2021-03-10 21:57:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1683673469387754) internal successors, (425), 196 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 425 transitions. [2021-03-10 21:57:42,202 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 425 transitions. Word has length 19 [2021-03-10 21:57:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:42,202 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 425 transitions. [2021-03-10 21:57:42,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 425 transitions. [2021-03-10 21:57:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:42,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:42,202 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:42,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2688 [2021-03-10 21:57:42,403 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:42,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1735851324, now seen corresponding path program 346 times [2021-03-10 21:57:42,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:42,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708057984] [2021-03-10 21:57:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:42,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708057984] [2021-03-10 21:57:42,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902737912] [2021-03-10 21:57:42,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:42,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:42,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:42,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:43,179 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:57:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:43,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:43,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823685456] [2021-03-10 21:57:43,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:43,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:43,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:43,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:43,253 INFO L87 Difference]: Start difference. First operand 197 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:43,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:43,685 INFO L93 Difference]: Finished difference Result 219 states and 469 transitions. [2021-03-10 21:57:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:57:43,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:43,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:43,687 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:57:43,687 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:57:43,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:57:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 194. [2021-03-10 21:57:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.160621761658031) internal successors, (417), 193 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 417 transitions. [2021-03-10 21:57:43,689 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 417 transitions. Word has length 19 [2021-03-10 21:57:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:43,689 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 417 transitions. [2021-03-10 21:57:43,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:43,689 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 417 transitions. [2021-03-10 21:57:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:43,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:43,690 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:43,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2696 [2021-03-10 21:57:43,890 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1517055293, now seen corresponding path program 347 times [2021-03-10 21:57:43,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:43,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800935354] [2021-03-10 21:57:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:44,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800935354] [2021-03-10 21:57:44,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081163685] [2021-03-10 21:57:44,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:44,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:57:44,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:44,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:44,741 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:57:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:44,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:44,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:44,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662154958] [2021-03-10 21:57:44,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:44,826 INFO L87 Difference]: Start difference. First operand 194 states and 417 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:45,588 INFO L93 Difference]: Finished difference Result 212 states and 453 transitions. [2021-03-10 21:57:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:57:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:45,590 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:57:45,590 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:57:45,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1181.4ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:57:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:57:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 194. [2021-03-10 21:57:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.160621761658031) internal successors, (417), 193 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 417 transitions. [2021-03-10 21:57:45,592 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 417 transitions. Word has length 19 [2021-03-10 21:57:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:45,592 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 417 transitions. [2021-03-10 21:57:45,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 417 transitions. [2021-03-10 21:57:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:45,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:45,593 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:45,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2704,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:45,793 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:45,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:45,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1229505058, now seen corresponding path program 348 times [2021-03-10 21:57:45,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:45,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402545006] [2021-03-10 21:57:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:46,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402545006] [2021-03-10 21:57:46,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230147673] [2021-03-10 21:57:46,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:46,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:57:46,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:46,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:46,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:46,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520679544] [2021-03-10 21:57:46,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:46,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:46,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:46,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:46,563 INFO L87 Difference]: Start difference. First operand 194 states and 417 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:47,448 INFO L93 Difference]: Finished difference Result 253 states and 531 transitions. [2021-03-10 21:57:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:47,450 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:57:47,450 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:57:47,450 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1216.2ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:57:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:57:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 197. [2021-03-10 21:57:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.173469387755102) internal successors, (426), 196 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 426 transitions. [2021-03-10 21:57:47,452 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 426 transitions. Word has length 19 [2021-03-10 21:57:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:47,452 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 426 transitions. [2021-03-10 21:57:47,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 426 transitions. [2021-03-10 21:57:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:47,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:47,453 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:47,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2712,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:47,653 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash -927514778, now seen corresponding path program 349 times [2021-03-10 21:57:47,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:47,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819751577] [2021-03-10 21:57:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:47,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819751577] [2021-03-10 21:57:47,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618916810] [2021-03-10 21:57:47,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:47,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:48,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:48,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470649758] [2021-03-10 21:57:48,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:48,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:48,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:48,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:48,401 INFO L87 Difference]: Start difference. First operand 197 states and 426 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:48,769 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:57:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:48,926 INFO L93 Difference]: Finished difference Result 228 states and 485 transitions. [2021-03-10 21:57:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:57:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:48,928 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:57:48,928 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:57:48,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:57:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:57:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 193. [2021-03-10 21:57:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1614583333333335) internal successors, (415), 192 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 415 transitions. [2021-03-10 21:57:48,930 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 415 transitions. Word has length 19 [2021-03-10 21:57:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:48,930 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 415 transitions. [2021-03-10 21:57:48,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 415 transitions. [2021-03-10 21:57:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:48,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:48,931 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:49,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2721 [2021-03-10 21:57:49,131 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:49,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1294777065, now seen corresponding path program 350 times [2021-03-10 21:57:49,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:49,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30484573] [2021-03-10 21:57:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:49,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30484573] [2021-03-10 21:57:49,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296925114] [2021-03-10 21:57:49,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:49,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:57:49,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:49,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:57:49,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:49,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:49,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:49,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178312101] [2021-03-10 21:57:49,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:49,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:49,956 INFO L87 Difference]: Start difference. First operand 193 states and 415 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:50,705 INFO L93 Difference]: Finished difference Result 217 states and 463 transitions. [2021-03-10 21:57:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:57:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:50,707 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:57:50,707 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:57:50,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 996.8ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:57:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:57:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 194. [2021-03-10 21:57:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.160621761658031) internal successors, (417), 193 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 417 transitions. [2021-03-10 21:57:50,709 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 417 transitions. Word has length 19 [2021-03-10 21:57:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:50,709 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 417 transitions. [2021-03-10 21:57:50,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:50,709 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 417 transitions. [2021-03-10 21:57:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:50,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:50,709 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:50,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2726,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:50,909 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:50,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1582327300, now seen corresponding path program 351 times [2021-03-10 21:57:50,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:50,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781591553] [2021-03-10 21:57:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:51,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781591553] [2021-03-10 21:57:51,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705664200] [2021-03-10 21:57:51,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:51,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:57:51,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:57:51,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:51,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:51,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914673329] [2021-03-10 21:57:51,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:51,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:51,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:51,647 INFO L87 Difference]: Start difference. First operand 194 states and 417 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:52,859 INFO L93 Difference]: Finished difference Result 268 states and 561 transitions. [2021-03-10 21:57:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:57:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:52,861 INFO L225 Difference]: With dead ends: 268 [2021-03-10 21:57:52,861 INFO L226 Difference]: Without dead ends: 268 [2021-03-10 21:57:52,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1419.6ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:57:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-03-10 21:57:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 198. [2021-03-10 21:57:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1776649746192893) internal successors, (429), 197 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 429 transitions. [2021-03-10 21:57:52,863 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 429 transitions. Word has length 19 [2021-03-10 21:57:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:52,863 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 429 transitions. [2021-03-10 21:57:52,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 429 transitions. [2021-03-10 21:57:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:52,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:52,864 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:53,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:53,064 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1884317580, now seen corresponding path program 352 times [2021-03-10 21:57:53,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:53,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213429339] [2021-03-10 21:57:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:53,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213429339] [2021-03-10 21:57:53,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137874360] [2021-03-10 21:57:53,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:53,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:57:53,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:53,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:53,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:53,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:53,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309208546] [2021-03-10 21:57:53,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:53,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:53,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:53,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:53,766 INFO L87 Difference]: Start difference. First operand 198 states and 429 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:54,877 INFO L93 Difference]: Finished difference Result 240 states and 511 transitions. [2021-03-10 21:57:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:57:54,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:54,878 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:57:54,879 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:57:54,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1214.2ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:57:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:57:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 197. [2021-03-10 21:57:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1785714285714284) internal successors, (427), 196 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 427 transitions. [2021-03-10 21:57:54,881 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 427 transitions. Word has length 19 [2021-03-10 21:57:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:54,881 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 427 transitions. [2021-03-10 21:57:54,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 427 transitions. [2021-03-10 21:57:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:54,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:54,881 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:55,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2744 [2021-03-10 21:57:55,081 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:55,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1904303450, now seen corresponding path program 353 times [2021-03-10 21:57:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:55,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266546557] [2021-03-10 21:57:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:55,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266546557] [2021-03-10 21:57:55,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701861706] [2021-03-10 21:57:55,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:55,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:57:55,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:55,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:55,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:55,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:55,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:57:55,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677384940] [2021-03-10 21:57:55,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:57:55,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:55,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:57:55,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:57:55,744 INFO L87 Difference]: Start difference. First operand 197 states and 427 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:56,307 INFO L93 Difference]: Finished difference Result 229 states and 487 transitions. [2021-03-10 21:57:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:57:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:57:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:56,309 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:57:56,309 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:57:56,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 639.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:57:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:57:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 191. [2021-03-10 21:57:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.163157894736842) internal successors, (411), 190 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 411 transitions. [2021-03-10 21:57:56,311 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 411 transitions. Word has length 19 [2021-03-10 21:57:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:56,311 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 411 transitions. [2021-03-10 21:57:56,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 411 transitions. [2021-03-10 21:57:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:56,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:56,311 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:56,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2749,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:56,511 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2111296839, now seen corresponding path program 354 times [2021-03-10 21:57:56,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:56,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245397561] [2021-03-10 21:57:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:56,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245397561] [2021-03-10 21:57:56,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134233992] [2021-03-10 21:57:56,779 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:56,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:57:56,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:57:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:57:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:57,173 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:57:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:57,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:57,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:57,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969709880] [2021-03-10 21:57:57,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:57,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:57,580 INFO L87 Difference]: Start difference. First operand 191 states and 411 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:58,177 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 21:57:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:57:58,483 INFO L93 Difference]: Finished difference Result 220 states and 469 transitions. [2021-03-10 21:57:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:57:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:57:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:57:58,485 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:57:58,485 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:57:58,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1343.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:57:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:57:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 192. [2021-03-10 21:57:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.162303664921466) internal successors, (413), 191 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 413 transitions. [2021-03-10 21:57:58,487 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 413 transitions. Word has length 19 [2021-03-10 21:57:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:57:58,487 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 413 transitions. [2021-03-10 21:57:58,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 413 transitions. [2021-03-10 21:57:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:57:58,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:57:58,487 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:57:58,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2754 [2021-03-10 21:57:58,695 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:57:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:57:58,695 INFO L82 PathProgramCache]: Analyzing trace with hash -259538612, now seen corresponding path program 355 times [2021-03-10 21:57:58,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:57:58,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064247383] [2021-03-10 21:57:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:57:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:58,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064247383] [2021-03-10 21:57:58,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497460012] [2021-03-10 21:57:58,952 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:57:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:57:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:57:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:57:59,530 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:57:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:57:59,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:57:59,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:57:59,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492140789] [2021-03-10 21:57:59,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:57:59,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:57:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:57:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:57:59,613 INFO L87 Difference]: Start difference. First operand 192 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:57:59,933 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 21:58:00,257 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:58:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:01,282 INFO L93 Difference]: Finished difference Result 289 states and 593 transitions. [2021-03-10 21:58:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:58:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:01,284 INFO L225 Difference]: With dead ends: 289 [2021-03-10 21:58:01,284 INFO L226 Difference]: Without dead ends: 289 [2021-03-10 21:58:01,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1821.7ms TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:58:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-03-10 21:58:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 205. [2021-03-10 21:58:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1911764705882355) internal successors, (447), 204 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 447 transitions. [2021-03-10 21:58:01,286 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 447 transitions. Word has length 19 [2021-03-10 21:58:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:01,286 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 447 transitions. [2021-03-10 21:58:01,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 447 transitions. [2021-03-10 21:58:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:01,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:01,287 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:01,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2757,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:01,487 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash -880588439, now seen corresponding path program 356 times [2021-03-10 21:58:01,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:01,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688812843] [2021-03-10 21:58:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:01,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688812843] [2021-03-10 21:58:01,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460687602] [2021-03-10 21:58:01,773 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:01,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:01,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:01,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:58:01,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:02,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:02,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:58:02,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735089588] [2021-03-10 21:58:02,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:58:02,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:58:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:58:02,359 INFO L87 Difference]: Start difference. First operand 205 states and 447 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:02,650 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 21:58:02,793 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:58:03,054 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 21:58:03,214 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 21:58:03,670 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 21:58:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:03,723 INFO L93 Difference]: Finished difference Result 279 states and 590 transitions. [2021-03-10 21:58:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:58:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:03,725 INFO L225 Difference]: With dead ends: 279 [2021-03-10 21:58:03,725 INFO L226 Difference]: Without dead ends: 279 [2021-03-10 21:58:03,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1560.1ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:58:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-03-10 21:58:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 206. [2021-03-10 21:58:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2) internal successors, (451), 205 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 451 transitions. [2021-03-10 21:58:03,727 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 451 transitions. Word has length 19 [2021-03-10 21:58:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:03,727 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 451 transitions. [2021-03-10 21:58:03,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 451 transitions. [2021-03-10 21:58:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:03,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:03,728 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:03,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2765 [2021-03-10 21:58:03,928 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash -593038204, now seen corresponding path program 357 times [2021-03-10 21:58:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:03,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520323473] [2021-03-10 21:58:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:04,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520323473] [2021-03-10 21:58:04,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895515294] [2021-03-10 21:58:04,197 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:04,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:58:04,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:04,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:58:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:04,648 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:58:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:04,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:04,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:04,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179408114] [2021-03-10 21:58:04,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:04,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:04,874 INFO L87 Difference]: Start difference. First operand 206 states and 451 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:05,160 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:58:05,414 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 21:58:05,690 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:58:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:06,034 INFO L93 Difference]: Finished difference Result 253 states and 533 transitions. [2021-03-10 21:58:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:58:06,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:06,036 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:58:06,036 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:58:06,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1598.3ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:58:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:58:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 197. [2021-03-10 21:58:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.183673469387755) internal successors, (428), 196 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 428 transitions. [2021-03-10 21:58:06,038 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 428 transitions. Word has length 19 [2021-03-10 21:58:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:06,038 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 428 transitions. [2021-03-10 21:58:06,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 428 transitions. [2021-03-10 21:58:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:06,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:06,038 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:06,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2774 [2021-03-10 21:58:06,239 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash -291047924, now seen corresponding path program 358 times [2021-03-10 21:58:06,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:06,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098915417] [2021-03-10 21:58:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:06,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098915417] [2021-03-10 21:58:06,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317839125] [2021-03-10 21:58:06,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:06,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:06,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:06,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:06,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776322727] [2021-03-10 21:58:06,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:06,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:06,986 INFO L87 Difference]: Start difference. First operand 197 states and 428 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:07,314 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:58:07,497 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:58:07,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:07,880 INFO L93 Difference]: Finished difference Result 230 states and 491 transitions. [2021-03-10 21:58:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:58:07,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:07,882 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:58:07,882 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 21:58:07,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1129.4ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:58:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 21:58:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 194. [2021-03-10 21:58:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1709844559585494) internal successors, (419), 193 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 419 transitions. [2021-03-10 21:58:07,883 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 419 transitions. Word has length 19 [2021-03-10 21:58:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:07,884 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 419 transitions. [2021-03-10 21:58:07,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 419 transitions. [2021-03-10 21:58:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:07,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:07,884 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:08,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2781,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:08,084 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:08,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1724048682, now seen corresponding path program 359 times [2021-03-10 21:58:08,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:08,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457404090] [2021-03-10 21:58:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:08,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457404090] [2021-03-10 21:58:08,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771696243] [2021-03-10 21:58:08,288 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:08,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:58:08,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:08,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:58:08,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:08,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:08,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:08,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282479015] [2021-03-10 21:58:08,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:08,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:08,873 INFO L87 Difference]: Start difference. First operand 194 states and 419 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:09,174 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:58:09,387 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:58:09,560 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:58:09,702 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 21:58:09,894 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:58:10,204 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 21:58:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:10,473 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2021-03-10 21:58:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:58:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:10,475 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:58:10,475 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:58:10,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1871.6ms TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:58:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:58:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 199. [2021-03-10 21:58:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-03-10 21:58:10,477 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 19 [2021-03-10 21:58:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:10,477 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-03-10 21:58:10,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-03-10 21:58:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:10,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:10,478 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:10,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2786,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:10,678 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:10,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1236327284, now seen corresponding path program 360 times [2021-03-10 21:58:10,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:10,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421837842] [2021-03-10 21:58:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:10,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421837842] [2021-03-10 21:58:10,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759917093] [2021-03-10 21:58:10,932 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:10,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:58:10,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:10,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:58:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:11,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:11,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:58:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214545628] [2021-03-10 21:58:11,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:58:11,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:11,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:58:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:58:11,617 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:11,947 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 21:58:12,287 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-10 21:58:12,557 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:58:12,701 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:58:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:13,417 INFO L93 Difference]: Finished difference Result 271 states and 568 transitions. [2021-03-10 21:58:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:58:13,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:13,419 INFO L225 Difference]: With dead ends: 271 [2021-03-10 21:58:13,419 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:58:13,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2044.8ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:58:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:58:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 200. [2021-03-10 21:58:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.185929648241206) internal successors, (435), 199 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 435 transitions. [2021-03-10 21:58:13,421 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 435 transitions. Word has length 19 [2021-03-10 21:58:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:13,421 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 435 transitions. [2021-03-10 21:58:13,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 435 transitions. [2021-03-10 21:58:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:13,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:13,422 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:13,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2795 [2021-03-10 21:58:13,622 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:13,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1774182862, now seen corresponding path program 361 times [2021-03-10 21:58:13,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:13,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524663741] [2021-03-10 21:58:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:13,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524663741] [2021-03-10 21:58:13,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115877752] [2021-03-10 21:58:13,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:13,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:14,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:14,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:14,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787201217] [2021-03-10 21:58:14,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:14,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:14,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:14,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:14,374 INFO L87 Difference]: Start difference. First operand 200 states and 435 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:14,716 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:58:14,952 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:58:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:15,816 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-03-10 21:58:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:58:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:15,818 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:58:15,818 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:58:15,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1643.3ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:58:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:58:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 200. [2021-03-10 21:58:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.185929648241206) internal successors, (435), 199 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 435 transitions. [2021-03-10 21:58:15,820 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 435 transitions. Word has length 19 [2021-03-10 21:58:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:15,820 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 435 transitions. [2021-03-10 21:58:15,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 435 transitions. [2021-03-10 21:58:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:15,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:15,820 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:16,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2802,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:16,021 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:16,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:16,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1267836596, now seen corresponding path program 362 times [2021-03-10 21:58:16,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:16,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929355443] [2021-03-10 21:58:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:16,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929355443] [2021-03-10 21:58:16,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054622082] [2021-03-10 21:58:16,256 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:16,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:16,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:16,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:16,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:16,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436033764] [2021-03-10 21:58:16,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:16,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:16,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:16,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:16,846 INFO L87 Difference]: Start difference. First operand 200 states and 435 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:17,385 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:58:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:17,831 INFO L93 Difference]: Finished difference Result 232 states and 495 transitions. [2021-03-10 21:58:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:58:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:17,833 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:58:17,833 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:58:17,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1141.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:58:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:58:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 197. [2021-03-10 21:58:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1683673469387754) internal successors, (425), 196 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 425 transitions. [2021-03-10 21:58:17,835 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 425 transitions. Word has length 19 [2021-03-10 21:58:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:17,835 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 425 transitions. [2021-03-10 21:58:17,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 425 transitions. [2021-03-10 21:58:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:17,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:17,836 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:18,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2807,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:18,036 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:18,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1096266199, now seen corresponding path program 363 times [2021-03-10 21:58:18,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:18,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330658989] [2021-03-10 21:58:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:18,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330658989] [2021-03-10 21:58:18,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046518193] [2021-03-10 21:58:18,275 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:18,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:58:18,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:58:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:18,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:18,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:58:18,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337274433] [2021-03-10 21:58:18,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:58:18,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:18,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:58:18,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:58:18,984 INFO L87 Difference]: Start difference. First operand 197 states and 425 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:19,307 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:58:19,529 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 21:58:19,819 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 21:58:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:20,043 INFO L93 Difference]: Finished difference Result 217 states and 465 transitions. [2021-03-10 21:58:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:58:20,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:20,045 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:58:20,045 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:58:20,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1443.6ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:58:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:58:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 199. [2021-03-10 21:58:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1666666666666665) internal successors, (429), 198 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 429 transitions. [2021-03-10 21:58:20,047 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 429 transitions. Word has length 19 [2021-03-10 21:58:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:20,047 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 429 transitions. [2021-03-10 21:58:20,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 429 transitions. [2021-03-10 21:58:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:20,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:20,048 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:20,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2812 [2021-03-10 21:58:20,248 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:20,248 INFO L82 PathProgramCache]: Analyzing trace with hash -808715964, now seen corresponding path program 364 times [2021-03-10 21:58:20,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:20,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412696647] [2021-03-10 21:58:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:20,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412696647] [2021-03-10 21:58:20,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447233692] [2021-03-10 21:58:20,478 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:20,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:20,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:20,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:20,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:21,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:21,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:21,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393102708] [2021-03-10 21:58:21,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:21,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:21,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:21,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:21,055 INFO L87 Difference]: Start difference. First operand 199 states and 429 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:21,415 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:58:21,652 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 21:58:22,009 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 21:58:22,325 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:58:22,502 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:58:22,690 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:58:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:23,108 INFO L93 Difference]: Finished difference Result 265 states and 557 transitions. [2021-03-10 21:58:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:58:23,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:23,110 INFO L225 Difference]: With dead ends: 265 [2021-03-10 21:58:23,110 INFO L226 Difference]: Without dead ends: 265 [2021-03-10 21:58:23,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2121.3ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:58:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-03-10 21:58:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 204. [2021-03-10 21:58:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.187192118226601) internal successors, (444), 203 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 444 transitions. [2021-03-10 21:58:23,112 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 444 transitions. Word has length 19 [2021-03-10 21:58:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:23,112 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 444 transitions. [2021-03-10 21:58:23,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 444 transitions. [2021-03-10 21:58:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:23,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:23,112 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:23,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2821,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:23,313 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash -506725684, now seen corresponding path program 365 times [2021-03-10 21:58:23,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:23,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356429413] [2021-03-10 21:58:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:23,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356429413] [2021-03-10 21:58:23,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012338254] [2021-03-10 21:58:23,535 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:23,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:58:23,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:58:23,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:23,937 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:58:24,108 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:58:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:24,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:24,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:24,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261075033] [2021-03-10 21:58:24,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:24,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:24,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:24,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:24,340 INFO L87 Difference]: Start difference. First operand 204 states and 444 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:24,672 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:58:24,889 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 21:58:25,256 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-10 21:58:25,586 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 21:58:25,756 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:58:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:26,151 INFO L93 Difference]: Finished difference Result 253 states and 539 transitions. [2021-03-10 21:58:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:58:26,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:26,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:26,153 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:58:26,153 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:58:26,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2232.2ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:58:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:58:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 203. [2021-03-10 21:58:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1881188118811883) internal successors, (442), 202 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 442 transitions. [2021-03-10 21:58:26,155 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 442 transitions. Word has length 19 [2021-03-10 21:58:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:26,155 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 442 transitions. [2021-03-10 21:58:26,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 442 transitions. [2021-03-10 21:58:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:26,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:26,155 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:26,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2830 [2021-03-10 21:58:26,370 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:26,370 INFO L82 PathProgramCache]: Analyzing trace with hash -379418, now seen corresponding path program 366 times [2021-03-10 21:58:26,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:26,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039786100] [2021-03-10 21:58:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:26,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039786100] [2021-03-10 21:58:26,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002199072] [2021-03-10 21:58:26,591 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:26,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:58:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:26,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:58:26,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:27,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:27,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:27,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474026916] [2021-03-10 21:58:27,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:27,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:27,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:27,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:27,115 INFO L87 Difference]: Start difference. First operand 203 states and 442 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:27,583 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 21:58:27,795 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 21:58:27,965 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:58:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:28,584 INFO L93 Difference]: Finished difference Result 250 states and 534 transitions. [2021-03-10 21:58:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:58:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:28,586 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:58:28,586 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 21:58:28,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1685.3ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:58:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 21:58:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 202. [2021-03-10 21:58:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.189054726368159) internal successors, (440), 201 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 440 transitions. [2021-03-10 21:58:28,588 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 440 transitions. Word has length 19 [2021-03-10 21:58:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:28,588 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 440 transitions. [2021-03-10 21:58:28,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 440 transitions. [2021-03-10 21:58:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:28,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:28,588 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:28,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:28,789 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:28,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:28,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1483514356, now seen corresponding path program 367 times [2021-03-10 21:58:28,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:28,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776074311] [2021-03-10 21:58:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:28,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776074311] [2021-03-10 21:58:28,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736382967] [2021-03-10 21:58:28,997 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:29,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:29,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:29,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545829052] [2021-03-10 21:58:29,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:29,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:29,511 INFO L87 Difference]: Start difference. First operand 202 states and 440 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:29,986 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:58:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:30,398 INFO L93 Difference]: Finished difference Result 230 states and 491 transitions. [2021-03-10 21:58:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:58:30,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:30,400 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:58:30,400 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 21:58:30,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1057.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:58:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 21:58:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 199. [2021-03-10 21:58:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1717171717171717) internal successors, (430), 198 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 430 transitions. [2021-03-10 21:58:30,402 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 430 transitions. Word has length 19 [2021-03-10 21:58:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:30,403 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 430 transitions. [2021-03-10 21:58:30,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 430 transitions. [2021-03-10 21:58:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:30,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:30,403 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:30,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2839,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:30,603 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:30,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1717344001, now seen corresponding path program 368 times [2021-03-10 21:58:30,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:30,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668738307] [2021-03-10 21:58:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:30,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668738307] [2021-03-10 21:58:30,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848194044] [2021-03-10 21:58:30,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:30,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:30,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:30,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:31,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:31,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:31,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573764098] [2021-03-10 21:58:31,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:31,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:31,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:31,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:31,294 INFO L87 Difference]: Start difference. First operand 199 states and 430 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:31,888 INFO L93 Difference]: Finished difference Result 211 states and 454 transitions. [2021-03-10 21:58:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:58:31,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:58:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:31,890 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:58:31,890 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:58:31,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 782.6ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:58:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:58:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 199. [2021-03-10 21:58:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1717171717171717) internal successors, (430), 198 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 430 transitions. [2021-03-10 21:58:31,892 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 430 transitions. Word has length 19 [2021-03-10 21:58:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:31,892 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 430 transitions. [2021-03-10 21:58:31,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 430 transitions. [2021-03-10 21:58:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:31,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:31,892 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:32,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2844,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:32,093 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:32,093 INFO L82 PathProgramCache]: Analyzing trace with hash -558465017, now seen corresponding path program 369 times [2021-03-10 21:58:32,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:32,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691966773] [2021-03-10 21:58:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:32,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691966773] [2021-03-10 21:58:32,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840997106] [2021-03-10 21:58:32,338 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:32,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:58:32,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:58:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:32,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:32,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:58:32,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281026277] [2021-03-10 21:58:32,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:58:32,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:32,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:58:32,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:58:32,906 INFO L87 Difference]: Start difference. First operand 199 states and 430 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:33,389 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:58:33,648 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:58:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:34,115 INFO L93 Difference]: Finished difference Result 228 states and 488 transitions. [2021-03-10 21:58:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:58:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:34,117 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:58:34,117 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:58:34,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1513.0ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:58:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:58:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 200. [2021-03-10 21:58:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.170854271356784) internal successors, (432), 199 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 432 transitions. [2021-03-10 21:58:34,119 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 432 transitions. Word has length 19 [2021-03-10 21:58:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:34,120 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 432 transitions. [2021-03-10 21:58:34,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 432 transitions. [2021-03-10 21:58:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:34,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:34,120 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:34,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2849,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:34,320 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1629460481, now seen corresponding path program 370 times [2021-03-10 21:58:34,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:34,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523897919] [2021-03-10 21:58:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523897919] [2021-03-10 21:58:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695393276] [2021-03-10 21:58:34,533 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:34,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:34,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:34,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:35,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:35,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:35,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36811482] [2021-03-10 21:58:35,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:35,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:35,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:35,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:35,067 INFO L87 Difference]: Start difference. First operand 200 states and 432 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:35,491 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:58:35,682 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 21:58:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:36,423 INFO L93 Difference]: Finished difference Result 231 states and 494 transitions. [2021-03-10 21:58:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:58:36,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:58:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:36,425 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:58:36,425 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:58:36,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1555.9ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:58:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:58:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2021-03-10 21:58:36,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.17) internal successors, (434), 200 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 434 transitions. [2021-03-10 21:58:36,427 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 434 transitions. Word has length 19 [2021-03-10 21:58:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:36,427 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 434 transitions. [2021-03-10 21:58:36,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 434 transitions. [2021-03-10 21:58:36,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:36,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:36,427 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:36,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2854 [2021-03-10 21:58:36,628 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:36,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:36,628 INFO L82 PathProgramCache]: Analyzing trace with hash 294671364, now seen corresponding path program 371 times [2021-03-10 21:58:36,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:36,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141916250] [2021-03-10 21:58:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:36,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141916250] [2021-03-10 21:58:36,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695441640] [2021-03-10 21:58:36,843 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:36,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:58:36,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:36,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:58:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:37,220 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 21:58:37,483 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:58:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:37,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:37,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:37,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618410316] [2021-03-10 21:58:37,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:37,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:37,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:37,583 INFO L87 Difference]: Start difference. First operand 201 states and 434 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,020 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:58:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:38,391 INFO L93 Difference]: Finished difference Result 218 states and 468 transitions. [2021-03-10 21:58:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:58:38,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:38,393 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:58:38,393 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:58:38,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1224.0ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:58:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:58:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 202. [2021-03-10 21:58:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1691542288557213) internal successors, (436), 201 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 436 transitions. [2021-03-10 21:58:38,395 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 436 transitions. Word has length 19 [2021-03-10 21:58:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:38,395 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 436 transitions. [2021-03-10 21:58:38,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 436 transitions. [2021-03-10 21:58:38,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:38,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:38,396 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:38,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2859,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:38,596 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:38,596 INFO L82 PathProgramCache]: Analyzing trace with hash 708992161, now seen corresponding path program 372 times [2021-03-10 21:58:38,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:38,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436854381] [2021-03-10 21:58:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:38,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436854381] [2021-03-10 21:58:38,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604957847] [2021-03-10 21:58:38,818 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:38,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:58:38,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:58:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:39,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:39,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:58:39,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369169704] [2021-03-10 21:58:39,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:58:39,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:39,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:58:39,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:58:39,515 INFO L87 Difference]: Start difference. First operand 202 states and 436 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:39,881 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:58:40,042 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 21:58:40,566 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 21:58:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:40,943 INFO L93 Difference]: Finished difference Result 220 states and 472 transitions. [2021-03-10 21:58:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:58:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:40,945 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:58:40,945 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:58:40,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1545.2ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:58:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:58:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 202. [2021-03-10 21:58:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1691542288557213) internal successors, (436), 201 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 436 transitions. [2021-03-10 21:58:40,947 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 436 transitions. Word has length 19 [2021-03-10 21:58:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:40,947 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 436 transitions. [2021-03-10 21:58:40,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 436 transitions. [2021-03-10 21:58:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:40,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:40,948 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:41,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2866 [2021-03-10 21:58:41,148 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash -362003303, now seen corresponding path program 373 times [2021-03-10 21:58:41,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:41,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446524422] [2021-03-10 21:58:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:41,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446524422] [2021-03-10 21:58:41,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079475081] [2021-03-10 21:58:41,370 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:41,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:41,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:41,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604459418] [2021-03-10 21:58:41,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:41,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:41,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:41,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:41,904 INFO L87 Difference]: Start difference. First operand 202 states and 436 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:42,363 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:58:42,532 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 21:58:42,893 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 21:58:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:43,391 INFO L93 Difference]: Finished difference Result 232 states and 496 transitions. [2021-03-10 21:58:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:58:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:58:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:43,394 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:58:43,394 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:58:43,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1649.3ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:58:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:58:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 202. [2021-03-10 21:58:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1691542288557213) internal successors, (436), 201 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 436 transitions. [2021-03-10 21:58:43,396 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 436 transitions. Word has length 19 [2021-03-10 21:58:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:43,396 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 436 transitions. [2021-03-10 21:58:43,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 436 transitions. [2021-03-10 21:58:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:43,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:43,396 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:43,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2869 [2021-03-10 21:58:43,597 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:43,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:43,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1562128542, now seen corresponding path program 374 times [2021-03-10 21:58:43,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:43,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849945577] [2021-03-10 21:58:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:43,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849945577] [2021-03-10 21:58:43,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684041133] [2021-03-10 21:58:43,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:43,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:43,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:43,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:58:43,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:44,319 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:58:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:44,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:44,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:58:44,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856595541] [2021-03-10 21:58:44,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:58:44,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:44,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:58:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:58:44,598 INFO L87 Difference]: Start difference. First operand 202 states and 436 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,171 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:58:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:45,443 INFO L93 Difference]: Finished difference Result 215 states and 459 transitions. [2021-03-10 21:58:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:58:45,445 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:45,445 INFO L225 Difference]: With dead ends: 215 [2021-03-10 21:58:45,445 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:58:45,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1207.2ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:58:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:58:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2021-03-10 21:58:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.158974358974359) internal successors, (421), 195 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 421 transitions. [2021-03-10 21:58:45,447 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 421 transitions. Word has length 19 [2021-03-10 21:58:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:45,447 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 421 transitions. [2021-03-10 21:58:45,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 421 transitions. [2021-03-10 21:58:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:45,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:45,447 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:45,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2874,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:45,648 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1845138241, now seen corresponding path program 375 times [2021-03-10 21:58:45,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:45,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375056605] [2021-03-10 21:58:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:45,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375056605] [2021-03-10 21:58:45,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162349374] [2021-03-10 21:58:45,941 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 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:45,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:58:45,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:58:45,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:46,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:46,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 21:58:46,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540772431] [2021-03-10 21:58:46,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:58:46,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:58:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:58:46,531 INFO L87 Difference]: Start difference. First operand 196 states and 421 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:46,962 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:58:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:47,444 INFO L93 Difference]: Finished difference Result 215 states and 459 transitions. [2021-03-10 21:58:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:58:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:47,446 INFO L225 Difference]: With dead ends: 215 [2021-03-10 21:58:47,446 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:58:47,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1176.4ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:58:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:58:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2021-03-10 21:58:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1581632653061225) internal successors, (423), 196 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 423 transitions. [2021-03-10 21:58:47,448 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 423 transitions. Word has length 19 [2021-03-10 21:58:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:47,448 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 423 transitions. [2021-03-10 21:58:47,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 423 transitions. [2021-03-10 21:58:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:47,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:47,448 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:47,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2883 [2021-03-10 21:58:47,648 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 78993604, now seen corresponding path program 376 times [2021-03-10 21:58:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:47,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806876207] [2021-03-10 21:58:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:47,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806876207] [2021-03-10 21:58:47,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617207547] [2021-03-10 21:58:47,934 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:47,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:47,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:47,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:47,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:48,485 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:58:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:48,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:48,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:48,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733057722] [2021-03-10 21:58:48,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:48,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:48,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:48,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:48,578 INFO L87 Difference]: Start difference. First operand 197 states and 423 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:48,982 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 21:58:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:49,392 INFO L93 Difference]: Finished difference Result 214 states and 457 transitions. [2021-03-10 21:58:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:58:49,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:49,394 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:58:49,394 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:58:49,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1149.2ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:58:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:58:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2021-03-10 21:58:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.158974358974359) internal successors, (421), 195 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 421 transitions. [2021-03-10 21:58:49,396 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 421 transitions. Word has length 19 [2021-03-10 21:58:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:49,396 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 421 transitions. [2021-03-10 21:58:49,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 421 transitions. [2021-03-10 21:58:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:49,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:49,397 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:49,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2888,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:49,597 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash -749251460, now seen corresponding path program 377 times [2021-03-10 21:58:49,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:49,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40432949] [2021-03-10 21:58:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:49,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40432949] [2021-03-10 21:58:49,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39309724] [2021-03-10 21:58:49,868 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 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:49,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:58:49,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:49,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:50,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:50,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:50,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622797963] [2021-03-10 21:58:50,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:50,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:50,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:50,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:50,421 INFO L87 Difference]: Start difference. First operand 196 states and 421 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:51,197 INFO L93 Difference]: Finished difference Result 237 states and 497 transitions. [2021-03-10 21:58:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:58:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:51,199 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:58:51,199 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 21:58:51,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 910.1ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:58:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 21:58:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 197. [2021-03-10 21:58:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1581632653061225) internal successors, (423), 196 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 423 transitions. [2021-03-10 21:58:51,201 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 423 transitions. Word has length 19 [2021-03-10 21:58:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:51,201 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 423 transitions. [2021-03-10 21:58:51,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 423 transitions. [2021-03-10 21:58:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:51,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:51,202 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:51,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2896 [2021-03-10 21:58:51,409 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:51,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:51,410 INFO L82 PathProgramCache]: Analyzing trace with hash 585339870, now seen corresponding path program 378 times [2021-03-10 21:58:51,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:51,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94968315] [2021-03-10 21:58:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:51,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94968315] [2021-03-10 21:58:51,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075405709] [2021-03-10 21:58:51,731 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 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:51,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:58:51,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:51,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:58:51,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:52,210 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:58:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:52,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:52,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:52,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957097089] [2021-03-10 21:58:52,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:52,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:52,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:52,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:52,409 INFO L87 Difference]: Start difference. First operand 197 states and 423 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,216 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-03-10 21:58:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:53,232 INFO L93 Difference]: Finished difference Result 248 states and 522 transitions. [2021-03-10 21:58:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:58:53,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:53,234 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:58:53,235 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:58:53,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1152.3ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:58:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:58:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 198. [2021-03-10 21:58:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.16751269035533) internal successors, (427), 197 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 427 transitions. [2021-03-10 21:58:53,237 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 427 transitions. Word has length 19 [2021-03-10 21:58:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:53,237 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 427 transitions. [2021-03-10 21:58:53,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 427 transitions. [2021-03-10 21:58:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:53,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:53,237 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:53,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2906,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:53,439 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash 47484292, now seen corresponding path program 379 times [2021-03-10 21:58:53,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:53,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611282676] [2021-03-10 21:58:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:53,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611282676] [2021-03-10 21:58:53,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797073812] [2021-03-10 21:58:53,749 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 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:54,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:54,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:54,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72719432] [2021-03-10 21:58:54,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:54,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:54,273 INFO L87 Difference]: Start difference. First operand 198 states and 427 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:55,039 INFO L93 Difference]: Finished difference Result 225 states and 480 transitions. [2021-03-10 21:58:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:58:55,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:55,042 INFO L225 Difference]: With dead ends: 225 [2021-03-10 21:58:55,042 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:58:55,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 919.2ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:58:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:58:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 196. [2021-03-10 21:58:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1538461538461537) internal successors, (420), 195 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 420 transitions. [2021-03-10 21:58:55,044 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 420 transitions. Word has length 19 [2021-03-10 21:58:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:55,044 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 420 transitions. [2021-03-10 21:58:55,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 420 transitions. [2021-03-10 21:58:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:55,044 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:55,044 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:55,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2914,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:55,245 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:55,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1345459015, now seen corresponding path program 380 times [2021-03-10 21:58:55,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:55,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229725247] [2021-03-10 21:58:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:55,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229725247] [2021-03-10 21:58:55,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128270602] [2021-03-10 21:58:55,511 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 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:55,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:58:55,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:55,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:56,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:56,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:58:56,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047911800] [2021-03-10 21:58:56,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:58:56,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:58:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:58:56,025 INFO L87 Difference]: Start difference. First operand 196 states and 420 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:56,665 INFO L93 Difference]: Finished difference Result 216 states and 460 transitions. [2021-03-10 21:58:56,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:58:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:58:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:56,667 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:58:56,667 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:58:56,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 757.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:58:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:58:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 196. [2021-03-10 21:58:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1538461538461537) internal successors, (420), 195 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 420 transitions. [2021-03-10 21:58:56,669 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 420 transitions. Word has length 19 [2021-03-10 21:58:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:56,669 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 420 transitions. [2021-03-10 21:58:56,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 420 transitions. [2021-03-10 21:58:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:56,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:56,669 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:56,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2919 [2021-03-10 21:58:56,869 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash 274463551, now seen corresponding path program 381 times [2021-03-10 21:58:56,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:56,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490351859] [2021-03-10 21:58:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490351859] [2021-03-10 21:58:57,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981196590] [2021-03-10 21:58:57,110 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 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:57,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:58:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:58:57,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:57,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:57,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:58:57,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824447028] [2021-03-10 21:58:57,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:58:57,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:57,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:58:57,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:58:57,672 INFO L87 Difference]: Start difference. First operand 196 states and 420 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,220 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:58:58,469 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:58:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:58:58,842 INFO L93 Difference]: Finished difference Result 228 states and 484 transitions. [2021-03-10 21:58:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:58:58,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:58:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:58:58,844 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:58:58,844 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:58:58,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1410.6ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:58:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:58:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2021-03-10 21:58:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1538461538461537) internal successors, (420), 195 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 420 transitions. [2021-03-10 21:58:58,846 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 420 transitions. Word has length 19 [2021-03-10 21:58:58,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:58:58,846 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 420 transitions. [2021-03-10 21:58:58,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:58:58,846 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 420 transitions. [2021-03-10 21:58:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:58:58,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:58:58,847 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:58:59,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:59,059 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:58:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:58:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2096371900, now seen corresponding path program 382 times [2021-03-10 21:58:59,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:58:59,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603389475] [2021-03-10 21:58:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:58:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:58:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603389475] [2021-03-10 21:58:59,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387979943] [2021-03-10 21:58:59,292 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 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:58:59,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:58:59,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:58:59,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:58:59,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:58:59,717 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:58:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:58:59,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:58:59,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:58:59,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916243756] [2021-03-10 21:58:59,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:58:59,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:58:59,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:58:59,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:58:59,908 INFO L87 Difference]: Start difference. First operand 196 states and 420 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,417 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:59:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:00,614 INFO L93 Difference]: Finished difference Result 212 states and 452 transitions. [2021-03-10 21:59:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:59:00,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:00,616 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:59:00,616 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:59:00,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1059.5ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:59:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:59:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 193. [2021-03-10 21:59:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.15625) internal successors, (414), 192 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 414 transitions. [2021-03-10 21:59:00,618 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 414 transitions. Word has length 19 [2021-03-10 21:59:00,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:00,618 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 414 transitions. [2021-03-10 21:59:00,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 414 transitions. [2021-03-10 21:59:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:00,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:00,618 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:00,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2929,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:00,818 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:00,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1208671387, now seen corresponding path program 383 times [2021-03-10 21:59:00,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:00,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461558640] [2021-03-10 21:59:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:01,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461558640] [2021-03-10 21:59:01,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148947161] [2021-03-10 21:59:01,140 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 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:01,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:59:01,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:01,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:01,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:01,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:01,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249419804] [2021-03-10 21:59:01,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:01,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:01,698 INFO L87 Difference]: Start difference. First operand 193 states and 414 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,250 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,566 INFO L93 Difference]: Finished difference Result 213 states and 454 transitions. [2021-03-10 21:59:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:59:02,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,568 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:59:02,568 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 21:59:02,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1041.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 21:59:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 193. [2021-03-10 21:59:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.15625) internal successors, (414), 192 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 414 transitions. [2021-03-10 21:59:02,570 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 414 transitions. Word has length 19 [2021-03-10 21:59:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,570 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 414 transitions. [2021-03-10 21:59:02,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 414 transitions. [2021-03-10 21:59:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:02,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,570 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2937,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:02,785 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,785 INFO L82 PathProgramCache]: Analyzing trace with hash 715460458, now seen corresponding path program 384 times [2021-03-10 21:59:02,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136214789] [2021-03-10 21:59:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:03,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136214789] [2021-03-10 21:59:03,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499614513] [2021-03-10 21:59:03,103 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 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:03,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:59:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:03,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:03,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:03,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:03,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774036822] [2021-03-10 21:59:03,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:03,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:03,706 INFO L87 Difference]: Start difference. First operand 193 states and 414 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:04,163 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:59:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:04,523 INFO L93 Difference]: Finished difference Result 206 states and 437 transitions. [2021-03-10 21:59:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:59:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:04,525 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:59:04,525 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:59:04,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1165.9ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:59:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2021-03-10 21:59:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.144385026737968) internal successors, (401), 187 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 401 transitions. [2021-03-10 21:59:04,527 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 401 transitions. Word has length 19 [2021-03-10 21:59:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:04,527 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 401 transitions. [2021-03-10 21:59:04,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 401 transitions. [2021-03-10 21:59:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:04,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:04,527 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:04,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2942,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:04,728 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:04,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1221806724, now seen corresponding path program 385 times [2021-03-10 21:59:04,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:04,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103124713] [2021-03-10 21:59:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:05,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103124713] [2021-03-10 21:59:05,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111878415] [2021-03-10 21:59:05,017 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:05,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:05,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:05,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989750645] [2021-03-10 21:59:05,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:05,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:05,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:05,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:05,494 INFO L87 Difference]: Start difference. First operand 188 states and 401 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:06,093 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 21:59:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:06,345 INFO L93 Difference]: Finished difference Result 270 states and 548 transitions. [2021-03-10 21:59:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:59:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:06,347 INFO L225 Difference]: With dead ends: 270 [2021-03-10 21:59:06,347 INFO L226 Difference]: Without dead ends: 270 [2021-03-10 21:59:06,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:59:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-03-10 21:59:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 191. [2021-03-10 21:59:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.163157894736842) internal successors, (411), 190 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 411 transitions. [2021-03-10 21:59:06,349 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 411 transitions. Word has length 19 [2021-03-10 21:59:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:06,349 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 411 transitions. [2021-03-10 21:59:06,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 411 transitions. [2021-03-10 21:59:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:06,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:06,349 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:06,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2951 [2021-03-10 21:59:06,549 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1578074459, now seen corresponding path program 386 times [2021-03-10 21:59:06,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:06,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890774828] [2021-03-10 21:59:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890774828] [2021-03-10 21:59:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802443638] [2021-03-10 21:59:06,834 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 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:06,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:06,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:59:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:07,828 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 21:59:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:07,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:07,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:07,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109102016] [2021-03-10 21:59:07,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:07,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:07,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:07,991 INFO L87 Difference]: Start difference. First operand 191 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,336 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:59:08,619 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:59:08,934 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:59:09,246 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 21:59:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:09,337 INFO L93 Difference]: Finished difference Result 242 states and 499 transitions. [2021-03-10 21:59:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:59:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:09,338 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:59:09,339 INFO L226 Difference]: Without dead ends: 236 [2021-03-10 21:59:09,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2251.0ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-03-10 21:59:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 204. [2021-03-10 21:59:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1773399014778323) internal successors, (442), 203 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 442 transitions. [2021-03-10 21:59:09,340 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 442 transitions. Word has length 19 [2021-03-10 21:59:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:09,341 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 442 transitions. [2021-03-10 21:59:09,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 442 transitions. [2021-03-10 21:59:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:09,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:09,341 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:09,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2960 [2021-03-10 21:59:09,556 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:09,556 INFO L82 PathProgramCache]: Analyzing trace with hash 683951146, now seen corresponding path program 387 times [2021-03-10 21:59:09,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:09,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733091651] [2021-03-10 21:59:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:09,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733091651] [2021-03-10 21:59:09,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479153484] [2021-03-10 21:59:09,863 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 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:09,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:59:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:09,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:10,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:10,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:10,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442863377] [2021-03-10 21:59:10,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:10,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:10,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:10,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:10,421 INFO L87 Difference]: Start difference. First operand 204 states and 442 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:10,839 INFO L93 Difference]: Finished difference Result 229 states and 490 transitions. [2021-03-10 21:59:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:59:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:10,840 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:59:10,840 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:59:10,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:59:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 200. [2021-03-10 21:59:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 199 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 430 transitions. [2021-03-10 21:59:10,842 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 430 transitions. Word has length 19 [2021-03-10 21:59:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:10,843 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 430 transitions. [2021-03-10 21:59:10,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 430 transitions. [2021-03-10 21:59:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:10,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:10,843 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:11,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2966 [2021-03-10 21:59:11,043 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash 58785791, now seen corresponding path program 388 times [2021-03-10 21:59:11,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:11,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053877936] [2021-03-10 21:59:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:11,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053877936] [2021-03-10 21:59:11,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99964105] [2021-03-10 21:59:11,355 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 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:11,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:11,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:11,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:11,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:12,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:12,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:12,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946932429] [2021-03-10 21:59:12,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:12,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:12,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:12,064 INFO L87 Difference]: Start difference. First operand 200 states and 430 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:12,426 INFO L93 Difference]: Finished difference Result 228 states and 486 transitions. [2021-03-10 21:59:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:12,428 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:59:12,428 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:59:12,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 928.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:59:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 201. [2021-03-10 21:59:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.16) internal successors, (432), 200 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 432 transitions. [2021-03-10 21:59:12,430 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 432 transitions. Word has length 19 [2021-03-10 21:59:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:12,430 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 432 transitions. [2021-03-10 21:59:12,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 432 transitions. [2021-03-10 21:59:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:12,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:12,431 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:12,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2970 [2021-03-10 21:59:12,631 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:12,631 INFO L82 PathProgramCache]: Analyzing trace with hash 855521543, now seen corresponding path program 389 times [2021-03-10 21:59:12,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:12,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186385251] [2021-03-10 21:59:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:12,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186385251] [2021-03-10 21:59:12,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608998211] [2021-03-10 21:59:12,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:12,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:59:12,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:12,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:13,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:13,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:13,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116836370] [2021-03-10 21:59:13,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:13,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:13,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:13,438 INFO L87 Difference]: Start difference. First operand 201 states and 432 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:14,096 INFO L93 Difference]: Finished difference Result 237 states and 504 transitions. [2021-03-10 21:59:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:59:14,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:14,098 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:59:14,098 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:59:14,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 959.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:59:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:59:14,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 202. [2021-03-10 21:59:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1592039800995027) internal successors, (434), 201 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 434 transitions. [2021-03-10 21:59:14,100 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 434 transitions. Word has length 19 [2021-03-10 21:59:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:14,100 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 434 transitions. [2021-03-10 21:59:14,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 434 transitions. [2021-03-10 21:59:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:14,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:14,100 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:14,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-03-10 21:59:14,300 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1143071778, now seen corresponding path program 390 times [2021-03-10 21:59:14,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:14,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141489498] [2021-03-10 21:59:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:14,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141489498] [2021-03-10 21:59:14,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523767462] [2021-03-10 21:59:14,614 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 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:14,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:59:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:14,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:14,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:15,127 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:59:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:15,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:15,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:15,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874107606] [2021-03-10 21:59:15,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:15,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:15,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:15,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:15,216 INFO L87 Difference]: Start difference. First operand 202 states and 434 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:15,894 INFO L93 Difference]: Finished difference Result 219 states and 468 transitions. [2021-03-10 21:59:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:15,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:15,896 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:59:15,896 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:59:15,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1037.2ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:59:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2021-03-10 21:59:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 199 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 430 transitions. [2021-03-10 21:59:15,898 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 430 transitions. Word has length 19 [2021-03-10 21:59:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:15,898 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 430 transitions. [2021-03-10 21:59:15,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 430 transitions. [2021-03-10 21:59:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:15,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:15,898 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:16,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2983 [2021-03-10 21:59:16,099 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1361867809, now seen corresponding path program 391 times [2021-03-10 21:59:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:16,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821700856] [2021-03-10 21:59:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821700856] [2021-03-10 21:59:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364433957] [2021-03-10 21:59:16,430 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 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:16,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:16,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:17,213 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:59:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:17,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:17,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:17,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840388254] [2021-03-10 21:59:17,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:17,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:17,309 INFO L87 Difference]: Start difference. First operand 200 states and 430 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:17,624 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 21:59:17,859 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:59:18,128 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 21:59:18,363 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:59:18,554 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:59:18,883 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-03-10 21:59:19,080 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 21:59:19,218 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 21:59:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:19,245 INFO L93 Difference]: Finished difference Result 267 states and 557 transitions. [2021-03-10 21:59:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:59:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:19,247 INFO L225 Difference]: With dead ends: 267 [2021-03-10 21:59:19,247 INFO L226 Difference]: Without dead ends: 267 [2021-03-10 21:59:19,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2489.5ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:59:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-03-10 21:59:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 199. [2021-03-10 21:59:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1616161616161618) internal successors, (428), 198 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 428 transitions. [2021-03-10 21:59:19,249 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 428 transitions. Word has length 19 [2021-03-10 21:59:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:19,249 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 428 transitions. [2021-03-10 21:59:19,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 428 transitions. [2021-03-10 21:59:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:19,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:19,250 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:19,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-03-10 21:59:19,450 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1649418044, now seen corresponding path program 392 times [2021-03-10 21:59:19,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:19,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142989131] [2021-03-10 21:59:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:19,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142989131] [2021-03-10 21:59:19,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805762539] [2021-03-10 21:59:19,751 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 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:19,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:20,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:20,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:20,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746706380] [2021-03-10 21:59:20,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:20,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:20,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:20,272 INFO L87 Difference]: Start difference. First operand 199 states and 428 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:20,754 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:21,007 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 21:59:21,470 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:59:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:21,507 INFO L93 Difference]: Finished difference Result 277 states and 575 transitions. [2021-03-10 21:59:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:59:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:21,509 INFO L225 Difference]: With dead ends: 277 [2021-03-10 21:59:21,509 INFO L226 Difference]: Without dead ends: 277 [2021-03-10 21:59:21,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1382.6ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:59:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-03-10 21:59:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 201. [2021-03-10 21:59:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.175) internal successors, (435), 200 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 435 transitions. [2021-03-10 21:59:21,511 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 435 transitions. Word has length 19 [2021-03-10 21:59:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:21,511 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 435 transitions. [2021-03-10 21:59:21,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 435 transitions. [2021-03-10 21:59:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:21,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:21,512 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:21,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2998,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:21,712 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash -310617281, now seen corresponding path program 393 times [2021-03-10 21:59:21,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:21,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725641126] [2021-03-10 21:59:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:22,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725641126] [2021-03-10 21:59:22,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567633649] [2021-03-10 21:59:22,042 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 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:22,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:59:22,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:59:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:22,566 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:59:23,046 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 21:59:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:23,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:23,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:23,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653380290] [2021-03-10 21:59:23,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:23,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:23,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:23,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:23,160 INFO L87 Difference]: Start difference. First operand 201 states and 435 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:23,507 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 21:59:23,762 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 21:59:24,101 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 21:59:24,459 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 21:59:24,758 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2021-03-10 21:59:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:24,830 INFO L93 Difference]: Finished difference Result 231 states and 490 transitions. [2021-03-10 21:59:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:24,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:24,830 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:59:24,830 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:59:24,830 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2411.2ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:59:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2021-03-10 21:59:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.17) internal successors, (434), 200 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 434 transitions. [2021-03-10 21:59:24,832 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 434 transitions. Word has length 19 [2021-03-10 21:59:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:24,832 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 434 transitions. [2021-03-10 21:59:24,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 434 transitions. [2021-03-10 21:59:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:24,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:24,833 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:25,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:25,033 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1951408324, now seen corresponding path program 394 times [2021-03-10 21:59:25,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:25,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907256599] [2021-03-10 21:59:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:25,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907256599] [2021-03-10 21:59:25,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808898311] [2021-03-10 21:59:25,338 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 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:25,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:25,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:25,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:25,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:25,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:25,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479620386] [2021-03-10 21:59:25,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:25,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:25,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:25,842 INFO L87 Difference]: Start difference. First operand 201 states and 434 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:26,228 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:26,488 INFO L93 Difference]: Finished difference Result 229 states and 489 transitions. [2021-03-10 21:59:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:26,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:26,490 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:59:26,490 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:59:26,491 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 846.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:59:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 197. [2021-03-10 21:59:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1581632653061225) internal successors, (423), 196 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 423 transitions. [2021-03-10 21:59:26,492 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 423 transitions. Word has length 19 [2021-03-10 21:59:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:26,492 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 423 transitions. [2021-03-10 21:59:26,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:26,492 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 423 transitions. [2021-03-10 21:59:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:26,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:26,493 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:26,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:26,693 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:26,693 INFO L82 PathProgramCache]: Analyzing trace with hash -121267129, now seen corresponding path program 395 times [2021-03-10 21:59:26,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:26,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314281489] [2021-03-10 21:59:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:26,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314281489] [2021-03-10 21:59:26,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732534104] [2021-03-10 21:59:26,944 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 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:26,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:59:26,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:27,494 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:59:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:27,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:27,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:27,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078681046] [2021-03-10 21:59:27,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:27,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:27,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:27,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:27,704 INFO L87 Difference]: Start difference. First operand 197 states and 423 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,074 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 21:59:28,384 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 21:59:28,590 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 21:59:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:28,716 INFO L93 Difference]: Finished difference Result 221 states and 467 transitions. [2021-03-10 21:59:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:59:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:28,718 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:59:28,718 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:59:28,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1406.7ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:59:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 198. [2021-03-10 21:59:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1522842639593907) internal successors, (424), 197 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 424 transitions. [2021-03-10 21:59:28,719 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 424 transitions. Word has length 19 [2021-03-10 21:59:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:28,720 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 424 transitions. [2021-03-10 21:59:28,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 424 transitions. [2021-03-10 21:59:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:28,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:28,720 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:28,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3018,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:28,920 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash 166283106, now seen corresponding path program 396 times [2021-03-10 21:59:28,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:28,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442108098] [2021-03-10 21:59:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:29,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442108098] [2021-03-10 21:59:29,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595837824] [2021-03-10 21:59:29,174 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 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:29,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:59:29,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:29,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:59:29,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:29,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:29,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:29,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739442904] [2021-03-10 21:59:29,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:29,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:29,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:29,762 INFO L87 Difference]: Start difference. First operand 198 states and 424 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:30,206 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:30,521 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:59:30,791 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:59:31,133 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 21:59:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:31,297 INFO L93 Difference]: Finished difference Result 278 states and 575 transitions. [2021-03-10 21:59:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:59:31,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:31,299 INFO L225 Difference]: With dead ends: 278 [2021-03-10 21:59:31,299 INFO L226 Difference]: Without dead ends: 278 [2021-03-10 21:59:31,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1603.7ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:59:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-10 21:59:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 202. [2021-03-10 21:59:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1691542288557213) internal successors, (436), 201 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 436 transitions. [2021-03-10 21:59:31,301 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 436 transitions. Word has length 19 [2021-03-10 21:59:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:31,301 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 436 transitions. [2021-03-10 21:59:31,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 436 transitions. [2021-03-10 21:59:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:31,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:31,302 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:31,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3026 [2021-03-10 21:59:31,502 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 468273386, now seen corresponding path program 397 times [2021-03-10 21:59:31,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:31,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828892527] [2021-03-10 21:59:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:31,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828892527] [2021-03-10 21:59:31,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214829600] [2021-03-10 21:59:31,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:32,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:32,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:32,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401820194] [2021-03-10 21:59:32,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:32,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:32,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:32,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:32,396 INFO L87 Difference]: Start difference. First operand 202 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:32,886 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:33,207 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:59:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:33,621 INFO L93 Difference]: Finished difference Result 240 states and 510 transitions. [2021-03-10 21:59:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:33,623 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:59:33,623 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:59:33,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1426.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:59:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 201. [2021-03-10 21:59:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.17) internal successors, (434), 200 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 434 transitions. [2021-03-10 21:59:33,625 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 434 transitions. Word has length 19 [2021-03-10 21:59:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:33,625 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 434 transitions. [2021-03-10 21:59:33,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 434 transitions. [2021-03-10 21:59:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:33,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:33,625 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:33,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:33,826 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash 974619652, now seen corresponding path program 398 times [2021-03-10 21:59:33,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:33,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645825318] [2021-03-10 21:59:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:34,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645825318] [2021-03-10 21:59:34,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015784628] [2021-03-10 21:59:34,090 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 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:34,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:34,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:34,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:34,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:34,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046071763] [2021-03-10 21:59:34,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:34,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:34,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:34,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:34,637 INFO L87 Difference]: Start difference. First operand 201 states and 434 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:35,122 INFO L93 Difference]: Finished difference Result 233 states and 494 transitions. [2021-03-10 21:59:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:35,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:35,124 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:59:35,124 INFO L226 Difference]: Without dead ends: 233 [2021-03-10 21:59:35,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 664.5ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-03-10 21:59:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 196. [2021-03-10 21:59:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1538461538461537) internal successors, (420), 195 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 420 transitions. [2021-03-10 21:59:35,126 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 420 transitions. Word has length 19 [2021-03-10 21:59:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:35,126 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 420 transitions. [2021-03-10 21:59:35,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 420 transitions. [2021-03-10 21:59:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:35,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:35,126 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:35,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-03-10 21:59:35,326 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:35,326 INFO L82 PathProgramCache]: Analyzing trace with hash -398904991, now seen corresponding path program 399 times [2021-03-10 21:59:35,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:35,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714946696] [2021-03-10 21:59:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:35,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714946696] [2021-03-10 21:59:35,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185706788] [2021-03-10 21:59:35,575 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 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:35,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:59:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:36,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:36,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:36,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183413372] [2021-03-10 21:59:36,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:36,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:36,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:36,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:36,094 INFO L87 Difference]: Start difference. First operand 196 states and 420 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:36,942 INFO L93 Difference]: Finished difference Result 216 states and 460 transitions. [2021-03-10 21:59:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:36,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:36,944 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:59:36,944 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:59:36,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 812.2ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:59:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 196. [2021-03-10 21:59:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1538461538461537) internal successors, (420), 195 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 420 transitions. [2021-03-10 21:59:36,946 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 420 transitions. Word has length 19 [2021-03-10 21:59:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:36,946 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 420 transitions. [2021-03-10 21:59:36,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 420 transitions. [2021-03-10 21:59:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:36,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:36,946 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:37,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-03-10 21:59:37,147 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:37,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1469900455, now seen corresponding path program 400 times [2021-03-10 21:59:37,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:37,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018131284] [2021-03-10 21:59:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:37,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018131284] [2021-03-10 21:59:37,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90312505] [2021-03-10 21:59:37,391 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 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:37,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:37,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:37,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:37,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:37,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:37,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329364649] [2021-03-10 21:59:37,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:37,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:37,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:37,938 INFO L87 Difference]: Start difference. First operand 196 states and 420 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:38,544 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:38,810 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:59:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:39,191 INFO L93 Difference]: Finished difference Result 230 states and 488 transitions. [2021-03-10 21:59:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:39,193 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:59:39,193 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 21:59:39,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1410.6ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 21:59:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 197. [2021-03-10 21:59:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1530612244897958) internal successors, (422), 196 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 422 transitions. [2021-03-10 21:59:39,195 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 422 transitions. Word has length 19 [2021-03-10 21:59:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:39,196 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 422 transitions. [2021-03-10 21:59:39,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 422 transitions. [2021-03-10 21:59:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:39,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:39,196 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:39,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3050,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:39,396 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash -673164703, now seen corresponding path program 401 times [2021-03-10 21:59:39,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:39,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628200278] [2021-03-10 21:59:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:39,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628200278] [2021-03-10 21:59:39,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305162610] [2021-03-10 21:59:39,634 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 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:39,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:59:39,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:40,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:40,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:40,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038390061] [2021-03-10 21:59:40,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:40,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:40,214 INFO L87 Difference]: Start difference. First operand 197 states and 422 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:40,920 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:41,260 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:59:41,618 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 21:59:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:41,731 INFO L93 Difference]: Finished difference Result 238 states and 504 transitions. [2021-03-10 21:59:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:59:41,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:41,733 INFO L225 Difference]: With dead ends: 238 [2021-03-10 21:59:41,733 INFO L226 Difference]: Without dead ends: 238 [2021-03-10 21:59:41,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1495.9ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-03-10 21:59:41,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 198. [2021-03-10 21:59:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1522842639593907) internal successors, (424), 197 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 424 transitions. [2021-03-10 21:59:41,735 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 424 transitions. Word has length 19 [2021-03-10 21:59:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:41,735 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 424 transitions. [2021-03-10 21:59:41,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 424 transitions. [2021-03-10 21:59:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:41,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:41,736 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:41,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-03-10 21:59:41,936 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash -385614468, now seen corresponding path program 402 times [2021-03-10 21:59:41,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:41,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726845931] [2021-03-10 21:59:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:42,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726845931] [2021-03-10 21:59:42,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287049238] [2021-03-10 21:59:42,197 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 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:42,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:59:42,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:42,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:42,674 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 21:59:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:42,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:42,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:42,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560023275] [2021-03-10 21:59:42,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:42,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:42,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:42,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:42,882 INFO L87 Difference]: Start difference. First operand 198 states and 424 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:43,363 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:59:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:43,589 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2021-03-10 21:59:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:43,591 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:59:43,591 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:59:43,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1039.7ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:59:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2021-03-10 21:59:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.154639175257732) internal successors, (418), 194 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 418 transitions. [2021-03-10 21:59:43,592 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 418 transitions. Word has length 19 [2021-03-10 21:59:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:43,593 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 418 transitions. [2021-03-10 21:59:43,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 418 transitions. [2021-03-10 21:59:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:43,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:43,593 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:43,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3064,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:43,793 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:43,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1341931903, now seen corresponding path program 403 times [2021-03-10 21:59:43,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:43,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001496136] [2021-03-10 21:59:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:44,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001496136] [2021-03-10 21:59:44,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873367621] [2021-03-10 21:59:44,104 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 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:44,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:44,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:44,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:44,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684457722] [2021-03-10 21:59:44,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:44,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:44,664 INFO L87 Difference]: Start difference. First operand 195 states and 418 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:45,227 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:45,518 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2021-03-10 21:59:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:45,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:45,520 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:59:45,520 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:59:45,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:59:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2021-03-10 21:59:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.154639175257732) internal successors, (418), 194 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 418 transitions. [2021-03-10 21:59:45,522 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 418 transitions. Word has length 19 [2021-03-10 21:59:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:45,522 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 418 transitions. [2021-03-10 21:59:45,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 418 transitions. [2021-03-10 21:59:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:45,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:45,522 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:45,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3072,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:45,723 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:45,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2138667655, now seen corresponding path program 404 times [2021-03-10 21:59:45,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:45,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411607430] [2021-03-10 21:59:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411607430] [2021-03-10 21:59:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354156894] [2021-03-10 21:59:46,049 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 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:46,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:46,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:46,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:46,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:46,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031392915] [2021-03-10 21:59:46,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:46,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:46,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:46,641 INFO L87 Difference]: Start difference. First operand 195 states and 418 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,285 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 21:59:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:47,736 INFO L93 Difference]: Finished difference Result 234 states and 496 transitions. [2021-03-10 21:59:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:59:47,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 21:59:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:47,738 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:59:47,738 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:59:47,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1408.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:59:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 195. [2021-03-10 21:59:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.154639175257732) internal successors, (418), 194 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 418 transitions. [2021-03-10 21:59:47,740 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 418 transitions. Word has length 19 [2021-03-10 21:59:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:47,740 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 418 transitions. [2021-03-10 21:59:47,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 418 transitions. [2021-03-10 21:59:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:47,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:47,740 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:47,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3077 [2021-03-10 21:59:47,940 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1868749406, now seen corresponding path program 405 times [2021-03-10 21:59:47,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:47,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789646935] [2021-03-10 21:59:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:48,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789646935] [2021-03-10 21:59:48,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971392788] [2021-03-10 21:59:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:48,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:59:48,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:59:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:48,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:48,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:48,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65297950] [2021-03-10 21:59:48,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:48,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:48,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:48,860 INFO L87 Difference]: Start difference. First operand 195 states and 418 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,408 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:59:49,631 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 21:59:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:49,794 INFO L93 Difference]: Finished difference Result 213 states and 452 transitions. [2021-03-10 21:59:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:49,796 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:59:49,796 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 21:59:49,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1204.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 21:59:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 192. [2021-03-10 21:59:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.1465968586387434) internal successors, (410), 191 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 410 transitions. [2021-03-10 21:59:49,797 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 410 transitions. Word has length 19 [2021-03-10 21:59:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:49,797 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 410 transitions. [2021-03-10 21:59:49,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 410 transitions. [2021-03-10 21:59:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:49,798 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:49,798 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:49,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3086 [2021-03-10 21:59:49,998 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:49,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1649953375, now seen corresponding path program 406 times [2021-03-10 21:59:49,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:49,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039927766] [2021-03-10 21:59:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:50,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039927766] [2021-03-10 21:59:50,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986240606] [2021-03-10 21:59:50,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:50,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:50,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:50,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:51,197 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:59:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:51,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:51,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:51,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839124546] [2021-03-10 21:59:51,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:51,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:51,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:51,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:51,301 INFO L87 Difference]: Start difference. First operand 192 states and 410 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:51,795 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:59:51,968 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-03-10 21:59:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:52,172 INFO L93 Difference]: Finished difference Result 212 states and 450 transitions. [2021-03-10 21:59:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:52,174 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:59:52,174 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:59:52,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1578.6ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:59:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 192. [2021-03-10 21:59:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.1465968586387434) internal successors, (410), 191 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 410 transitions. [2021-03-10 21:59:52,175 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 410 transitions. Word has length 19 [2021-03-10 21:59:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:52,176 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 410 transitions. [2021-03-10 21:59:52,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 410 transitions. [2021-03-10 21:59:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:52,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:52,176 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:52,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3095 [2021-03-10 21:59:52,376 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1362403140, now seen corresponding path program 407 times [2021-03-10 21:59:52,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:52,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803329043] [2021-03-10 21:59:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:52,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803329043] [2021-03-10 21:59:52,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615749470] [2021-03-10 21:59:52,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:52,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:59:52,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:53,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:53,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400934849] [2021-03-10 21:59:53,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:53,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:53,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:53,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:53,264 INFO L87 Difference]: Start difference. First operand 192 states and 410 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:53,729 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 21:59:54,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:54,230 INFO L93 Difference]: Finished difference Result 253 states and 528 transitions. [2021-03-10 21:59:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:59:54,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:54,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:54,232 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:59:54,232 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:59:54,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1107.3ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:59:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:59:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2021-03-10 21:59:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.1597938144329896) internal successors, (419), 194 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 419 transitions. [2021-03-10 21:59:54,234 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 419 transitions. Word has length 19 [2021-03-10 21:59:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:54,234 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 419 transitions. [2021-03-10 21:59:54,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 419 transitions. [2021-03-10 21:59:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:54,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:54,235 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:54,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:54,435 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:54,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1060412860, now seen corresponding path program 408 times [2021-03-10 21:59:54,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:54,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005077334] [2021-03-10 21:59:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:54,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005077334] [2021-03-10 21:59:54,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145853790] [2021-03-10 21:59:54,754 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:54,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:59:54,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:54,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:59:54,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:55,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:55,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:59:55,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920295647] [2021-03-10 21:59:55,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:59:55,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:59:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:55,331 INFO L87 Difference]: Start difference. First operand 195 states and 419 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:55,946 INFO L93 Difference]: Finished difference Result 228 states and 482 transitions. [2021-03-10 21:59:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:59:55,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:55,948 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:59:55,948 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:59:55,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 934.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:59:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 190. [2021-03-10 21:59:55,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1481481481481484) internal successors, (406), 189 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 406 transitions. [2021-03-10 21:59:55,950 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 406 transitions. Word has length 19 [2021-03-10 21:59:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:55,950 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 406 transitions. [2021-03-10 21:59:55,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 406 transitions. [2021-03-10 21:59:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:55,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:55,950 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:56,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-03-10 21:59:56,151 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1685578215, now seen corresponding path program 409 times [2021-03-10 21:59:56,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:56,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343696347] [2021-03-10 21:59:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343696347] [2021-03-10 21:59:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862384273] [2021-03-10 21:59:56,464 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 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:59:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:57,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:57,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:57,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97973066] [2021-03-10 21:59:57,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:57,157 INFO L87 Difference]: Start difference. First operand 190 states and 406 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:57,819 INFO L93 Difference]: Finished difference Result 214 states and 454 transitions. [2021-03-10 21:59:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:57,821 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:59:57,821 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:59:57,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 981.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:59:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 192. [2021-03-10 21:59:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.1465968586387434) internal successors, (410), 191 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 410 transitions. [2021-03-10 21:59:57,823 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 410 transitions. Word has length 19 [2021-03-10 21:59:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:57,823 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 410 transitions. [2021-03-10 21:59:57,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 410 transitions. [2021-03-10 21:59:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:57,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:57,823 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:58,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3116,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:58,024 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -888842463, now seen corresponding path program 410 times [2021-03-10 21:59:58,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:58,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541368106] [2021-03-10 21:59:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:58,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541368106] [2021-03-10 21:59:58,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013063823] [2021-03-10 21:59:58,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:58,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:58,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:58,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:59:58,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:58,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:58,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:59:58,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850874097] [2021-03-10 21:59:58,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:58,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:58,918 INFO L87 Difference]: Start difference. First operand 192 states and 410 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:59,630 INFO L93 Difference]: Finished difference Result 234 states and 491 transitions. [2021-03-10 21:59:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:59,632 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:59:59,632 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:59:59,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:59:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 193. [2021-03-10 21:59:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1510416666666665) internal successors, (413), 192 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 413 transitions. [2021-03-10 21:59:59,634 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 413 transitions. Word has length 19 [2021-03-10 21:59:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:59,634 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 413 transitions. [2021-03-10 21:59:59,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 413 transitions. [2021-03-10 21:59:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:59,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:59,635 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:59,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-03-10 21:59:59,835 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash 238553630, now seen corresponding path program 411 times [2021-03-10 21:59:59,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:59,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954105563] [2021-03-10 21:59:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:00,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954105563] [2021-03-10 22:00:00,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554526067] [2021-03-10 22:00:00,180 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 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:00,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:00:00,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:00,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 22:00:00,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:00,614 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:00:00,769 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 22:00:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:00,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:00,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:00,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103651568] [2021-03-10 22:00:00,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:00,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:00,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:00,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:00,917 INFO L87 Difference]: Start difference. First operand 193 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:01,665 INFO L93 Difference]: Finished difference Result 212 states and 448 transitions. [2021-03-10 22:00:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:00:01,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:01,667 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:00:01,667 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:00:01,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1018.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:00:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 191. [2021-03-10 22:00:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1473684210526316) internal successors, (408), 190 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 408 transitions. [2021-03-10 22:00:01,669 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 408 transitions. Word has length 19 [2021-03-10 22:00:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:01,669 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 408 transitions. [2021-03-10 22:00:01,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 408 transitions. [2021-03-10 22:00:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:01,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:01,669 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:01,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3129 [2021-03-10 22:00:01,870 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash -382496197, now seen corresponding path program 412 times [2021-03-10 22:00:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:01,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466565626] [2021-03-10 22:00:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:02,186 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:00:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466565626] [2021-03-10 22:00:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436786629] [2021-03-10 22:00:02,317 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 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:02,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:02,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:02,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:00:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:02,557 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 22:00:02,721 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:00:03,260 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 22:00:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:03,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:03,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:03,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219286193] [2021-03-10 22:00:03,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:03,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:03,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:03,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:03,370 INFO L87 Difference]: Start difference. First operand 191 states and 408 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:03,768 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 22:00:03,996 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:00:04,215 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:00:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:04,344 INFO L93 Difference]: Finished difference Result 205 states and 436 transitions. [2021-03-10 22:00:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:04,346 INFO L225 Difference]: With dead ends: 205 [2021-03-10 22:00:04,346 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 22:00:04,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1886.7ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 22:00:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 191. [2021-03-10 22:00:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1473684210526316) internal successors, (408), 190 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 408 transitions. [2021-03-10 22:00:04,348 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 408 transitions. Word has length 19 [2021-03-10 22:00:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:04,348 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 408 transitions. [2021-03-10 22:00:04,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 408 transitions. [2021-03-10 22:00:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:04,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:04,348 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:04,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3137,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:04,549 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:04,549 INFO L82 PathProgramCache]: Analyzing trace with hash -94945962, now seen corresponding path program 413 times [2021-03-10 22:00:04,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:04,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820003169] [2021-03-10 22:00:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:04,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820003169] [2021-03-10 22:00:04,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33389042] [2021-03-10 22:00:04,899 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 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:04,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:00:04,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:04,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:05,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:05,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:05,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673054080] [2021-03-10 22:00:05,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:05,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:05,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:05,498 INFO L87 Difference]: Start difference. First operand 191 states and 408 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,758 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 22:00:05,900 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 22:00:06,229 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 22:00:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:06,634 INFO L93 Difference]: Finished difference Result 245 states and 512 transitions. [2021-03-10 22:00:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:06,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:06,636 INFO L225 Difference]: With dead ends: 245 [2021-03-10 22:00:06,636 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 22:00:06,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1478.8ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:00:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 22:00:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 194. [2021-03-10 22:00:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.160621761658031) internal successors, (417), 193 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 417 transitions. [2021-03-10 22:00:06,638 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 417 transitions. Word has length 19 [2021-03-10 22:00:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:06,638 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 417 transitions. [2021-03-10 22:00:06,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 417 transitions. [2021-03-10 22:00:06,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:06,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:06,639 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:06,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3144 [2021-03-10 22:00:06,839 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash 207044318, now seen corresponding path program 414 times [2021-03-10 22:00:06,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:06,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327379047] [2021-03-10 22:00:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:07,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327379047] [2021-03-10 22:00:07,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721824717] [2021-03-10 22:00:07,182 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 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:07,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:00:07,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:07,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:07,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:07,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:07,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:07,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624912553] [2021-03-10 22:00:07,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:07,766 INFO L87 Difference]: Start difference. First operand 194 states and 417 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,219 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:00:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:08,496 INFO L93 Difference]: Finished difference Result 220 states and 466 transitions. [2021-03-10 22:00:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:00:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:08,498 INFO L225 Difference]: With dead ends: 220 [2021-03-10 22:00:08,498 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 22:00:08,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1017.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:00:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 22:00:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2021-03-10 22:00:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1481481481481484) internal successors, (406), 189 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 406 transitions. [2021-03-10 22:00:08,500 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 406 transitions. Word has length 19 [2021-03-10 22:00:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:08,500 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 406 transitions. [2021-03-10 22:00:08,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 406 transitions. [2021-03-10 22:00:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:08,501 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:08,501 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:08,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-03-10 22:00:08,701 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash -738235042, now seen corresponding path program 415 times [2021-03-10 22:00:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:08,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498838817] [2021-03-10 22:00:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:08,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498838817] [2021-03-10 22:00:08,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253799010] [2021-03-10 22:00:08,995 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 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:09,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:09,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:09,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137335901] [2021-03-10 22:00:09,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:09,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:09,672 INFO L87 Difference]: Start difference. First operand 190 states and 406 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:09,946 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 22:00:10,099 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 22:00:10,373 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 22:00:10,673 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 22:00:10,951 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 22:00:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:11,327 INFO L93 Difference]: Finished difference Result 253 states and 527 transitions. [2021-03-10 22:00:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:00:11,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:11,329 INFO L225 Difference]: With dead ends: 253 [2021-03-10 22:00:11,329 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 22:00:11,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1892.1ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:00:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 22:00:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2021-03-10 22:00:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.1649484536082473) internal successors, (420), 194 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 420 transitions. [2021-03-10 22:00:11,331 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 420 transitions. Word has length 19 [2021-03-10 22:00:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:11,331 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 420 transitions. [2021-03-10 22:00:11,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 420 transitions. [2021-03-10 22:00:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:11,331 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:11,332 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:11,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:11,532 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:11,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1276090620, now seen corresponding path program 416 times [2021-03-10 22:00:11,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:11,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350996834] [2021-03-10 22:00:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:11,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350996834] [2021-03-10 22:00:11,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262730763] [2021-03-10 22:00:11,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:11,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:11,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:12,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:12,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:12,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822609418] [2021-03-10 22:00:12,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:12,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:12,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:12,501 INFO L87 Difference]: Start difference. First operand 195 states and 420 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:12,771 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 22:00:13,078 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:00:13,482 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:00:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:13,988 INFO L93 Difference]: Finished difference Result 231 states and 490 transitions. [2021-03-10 22:00:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:00:13,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:13,991 INFO L225 Difference]: With dead ends: 231 [2021-03-10 22:00:13,991 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 22:00:13,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1623.7ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:00:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 22:00:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 194. [2021-03-10 22:00:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1658031088082903) internal successors, (418), 193 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 418 transitions. [2021-03-10 22:00:13,993 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 418 transitions. Word has length 19 [2021-03-10 22:00:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:13,993 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 418 transitions. [2021-03-10 22:00:13,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 418 transitions. [2021-03-10 22:00:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:13,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:13,994 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:14,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3167,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:14,194 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:14,194 INFO L82 PathProgramCache]: Analyzing trace with hash -769744354, now seen corresponding path program 417 times [2021-03-10 22:00:14,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:14,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352212474] [2021-03-10 22:00:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:14,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352212474] [2021-03-10 22:00:14,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328211909] [2021-03-10 22:00:14,476 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 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:14,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:00:14,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:14,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:00:14,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:14,790 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:00:15,009 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:00:15,184 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:00:15,368 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:00:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:15,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:15,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:15,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968172188] [2021-03-10 22:00:15,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:15,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:15,492 INFO L87 Difference]: Start difference. First operand 194 states and 418 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:16,291 INFO L93 Difference]: Finished difference Result 227 states and 480 transitions. [2021-03-10 22:00:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:00:16,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:16,294 INFO L225 Difference]: With dead ends: 227 [2021-03-10 22:00:16,294 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 22:00:16,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1227.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 22:00:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 190. [2021-03-10 22:00:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1481481481481484) internal successors, (406), 189 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 406 transitions. [2021-03-10 22:00:16,296 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 406 transitions. Word has length 19 [2021-03-10 22:00:16,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:16,296 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 406 transitions. [2021-03-10 22:00:16,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:16,296 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 406 transitions. [2021-03-10 22:00:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:16,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:16,296 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:16,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3172,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:16,496 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:16,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1049111361, now seen corresponding path program 418 times [2021-03-10 22:00:16,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:16,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075210016] [2021-03-10 22:00:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:16,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075210016] [2021-03-10 22:00:16,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8467165] [2021-03-10 22:00:16,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:16,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:16,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:00:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:17,096 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 22:00:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:17,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:17,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014366152] [2021-03-10 22:00:17,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:17,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:17,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:17,621 INFO L87 Difference]: Start difference. First operand 190 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,128 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:00:18,457 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-10 22:00:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:18,753 INFO L93 Difference]: Finished difference Result 214 states and 453 transitions. [2021-03-10 22:00:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:00:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 22:00:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:18,755 INFO L225 Difference]: With dead ends: 214 [2021-03-10 22:00:18,755 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 22:00:18,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1617.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 22:00:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2021-03-10 22:00:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1481481481481484) internal successors, (406), 189 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 406 transitions. [2021-03-10 22:00:18,757 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 406 transitions. Word has length 19 [2021-03-10 22:00:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:18,757 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 406 transitions. [2021-03-10 22:00:18,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 406 transitions. [2021-03-10 22:00:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:18,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:18,757 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:18,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3175 [2021-03-10 22:00:18,961 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:18,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1117770884, now seen corresponding path program 419 times [2021-03-10 22:00:18,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:18,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051946077] [2021-03-10 22:00:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:19,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051946077] [2021-03-10 22:00:19,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448314724] [2021-03-10 22:00:19,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:19,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:00:19,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:00:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:19,983 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:00:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:20,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:20,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:20,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952636602] [2021-03-10 22:00:20,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:20,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:20,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:20,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:20,103 INFO L87 Difference]: Start difference. First operand 190 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:20,308 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 22:00:20,567 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 22:00:20,779 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-10 22:00:21,144 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-03-10 22:00:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:21,272 INFO L93 Difference]: Finished difference Result 242 states and 491 transitions. [2021-03-10 22:00:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:00:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:21,275 INFO L225 Difference]: With dead ends: 242 [2021-03-10 22:00:21,275 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 22:00:21,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1672.9ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:00:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 22:00:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 194. [2021-03-10 22:00:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.160621761658031) internal successors, (417), 193 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 417 transitions. [2021-03-10 22:00:21,277 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 417 transitions. Word has length 19 [2021-03-10 22:00:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:21,277 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 417 transitions. [2021-03-10 22:00:21,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 417 transitions. [2021-03-10 22:00:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:21,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:21,277 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:21,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:21,477 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash -252375609, now seen corresponding path program 420 times [2021-03-10 22:00:21,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:21,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240204729] [2021-03-10 22:00:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:21,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240204729] [2021-03-10 22:00:21,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786859588] [2021-03-10 22:00:21,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:21,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:00:21,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:22,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:22,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:22,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426372160] [2021-03-10 22:00:22,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:22,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:22,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:22,522 INFO L87 Difference]: Start difference. First operand 194 states and 417 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,079 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-10 22:00:23,240 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 22:00:23,520 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:00:23,875 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-03-10 22:00:24,175 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 22:00:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:24,190 INFO L93 Difference]: Finished difference Result 257 states and 530 transitions. [2021-03-10 22:00:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:00:24,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:24,192 INFO L225 Difference]: With dead ends: 257 [2021-03-10 22:00:24,192 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 22:00:24,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1957.8ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:00:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 22:00:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 194. [2021-03-10 22:00:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.160621761658031) internal successors, (417), 193 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 417 transitions. [2021-03-10 22:00:24,195 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 417 transitions. Word has length 19 [2021-03-10 22:00:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:24,195 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 417 transitions. [2021-03-10 22:00:24,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 417 transitions. [2021-03-10 22:00:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:24,195 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:24,195 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:24,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3186 [2021-03-10 22:00:24,395 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:24,395 INFO L82 PathProgramCache]: Analyzing trace with hash 223935837, now seen corresponding path program 421 times [2021-03-10 22:00:24,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:24,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968402729] [2021-03-10 22:00:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:24,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968402729] [2021-03-10 22:00:24,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766760467] [2021-03-10 22:00:24,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:24,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:24,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:25,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:25,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:25,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931877802] [2021-03-10 22:00:25,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:25,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:25,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:25,359 INFO L87 Difference]: Start difference. First operand 194 states and 417 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:26,287 INFO L93 Difference]: Finished difference Result 219 states and 463 transitions. [2021-03-10 22:00:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:26,290 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:26,290 INFO L225 Difference]: With dead ends: 219 [2021-03-10 22:00:26,290 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 22:00:26,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1252.7ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 22:00:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 194. [2021-03-10 22:00:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.155440414507772) internal successors, (416), 193 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 416 transitions. [2021-03-10 22:00:26,292 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 416 transitions. Word has length 19 [2021-03-10 22:00:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:26,292 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 416 transitions. [2021-03-10 22:00:26,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 416 transitions. [2021-03-10 22:00:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:26,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:26,292 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:26,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3195,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:26,493 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash 875020484, now seen corresponding path program 422 times [2021-03-10 22:00:26,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:26,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898880019] [2021-03-10 22:00:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:26,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898880019] [2021-03-10 22:00:26,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990215273] [2021-03-10 22:00:26,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:26,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:26,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:00:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:27,678 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 22:00:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:27,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:27,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:27,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115271284] [2021-03-10 22:00:27,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:27,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:27,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:27,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:27,805 INFO L87 Difference]: Start difference. First operand 194 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:28,376 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-03-10 22:00:28,545 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 22:00:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:28,968 INFO L93 Difference]: Finished difference Result 210 states and 445 transitions. [2021-03-10 22:00:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:28,970 INFO L225 Difference]: With dead ends: 210 [2021-03-10 22:00:28,970 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:00:28,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1788.5ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:00:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2021-03-10 22:00:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.143617021276596) internal successors, (403), 188 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 403 transitions. [2021-03-10 22:00:28,972 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 403 transitions. Word has length 19 [2021-03-10 22:00:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:28,972 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 403 transitions. [2021-03-10 22:00:28,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:28,972 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 403 transitions. [2021-03-10 22:00:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:28,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:28,972 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:29,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3205,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:29,173 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1381366750, now seen corresponding path program 423 times [2021-03-10 22:00:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:29,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365385364] [2021-03-10 22:00:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:29,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365385364] [2021-03-10 22:00:29,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882901546] [2021-03-10 22:00:29,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:29,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:00:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:29,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:30,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:30,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:00:30,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373476839] [2021-03-10 22:00:30,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:00:30,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:30,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:00:30,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:00:30,244 INFO L87 Difference]: Start difference. First operand 189 states and 403 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:30,619 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 22:00:30,769 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 22:00:30,908 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2021-03-10 22:00:31,162 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 22:00:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:31,573 INFO L93 Difference]: Finished difference Result 234 states and 488 transitions. [2021-03-10 22:00:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:00:31,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:31,576 INFO L225 Difference]: With dead ends: 234 [2021-03-10 22:00:31,576 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 22:00:31,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1685.5ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:00:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 22:00:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2021-03-10 22:00:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1578947368421053) internal successors, (410), 190 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 410 transitions. [2021-03-10 22:00:31,578 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 410 transitions. Word has length 19 [2021-03-10 22:00:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:31,578 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 410 transitions. [2021-03-10 22:00:31,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 410 transitions. [2021-03-10 22:00:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:31,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:31,578 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:31,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:31,790 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:31,791 INFO L82 PathProgramCache]: Analyzing trace with hash 843511172, now seen corresponding path program 424 times [2021-03-10 22:00:31,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:31,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931837171] [2021-03-10 22:00:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:32,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931837171] [2021-03-10 22:00:32,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859964563] [2021-03-10 22:00:32,187 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 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:32,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:32,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:32,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:32,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:32,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:32,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825903845] [2021-03-10 22:00:32,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:32,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:32,859 INFO L87 Difference]: Start difference. First operand 191 states and 410 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,212 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 22:00:33,405 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 22:00:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:33,795 INFO L93 Difference]: Finished difference Result 213 states and 451 transitions. [2021-03-10 22:00:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:00:33,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:33,797 INFO L225 Difference]: With dead ends: 213 [2021-03-10 22:00:33,797 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 22:00:33,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1375.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:00:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 22:00:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 189. [2021-03-10 22:00:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.143617021276596) internal successors, (403), 188 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 403 transitions. [2021-03-10 22:00:33,799 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 403 transitions. Word has length 19 [2021-03-10 22:00:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:33,799 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 403 transitions. [2021-03-10 22:00:33,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 403 transitions. [2021-03-10 22:00:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:33,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:33,799 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:34,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3220 [2021-03-10 22:00:34,000 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash -101768188, now seen corresponding path program 425 times [2021-03-10 22:00:34,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:34,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737291314] [2021-03-10 22:00:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:34,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737291314] [2021-03-10 22:00:34,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113532486] [2021-03-10 22:00:34,287 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 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:34,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:00:34,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:34,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:34,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:34,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:34,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:34,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778631462] [2021-03-10 22:00:34,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:34,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:34,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:34,948 INFO L87 Difference]: Start difference. First operand 189 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:35,376 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 22:00:35,574 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 22:00:35,778 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:00:36,102 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 22:00:36,384 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 22:00:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:36,666 INFO L93 Difference]: Finished difference Result 252 states and 524 transitions. [2021-03-10 22:00:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:00:36,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:36,668 INFO L225 Difference]: With dead ends: 252 [2021-03-10 22:00:36,668 INFO L226 Difference]: Without dead ends: 252 [2021-03-10 22:00:36,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2023.4ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:00:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-03-10 22:00:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 191. [2021-03-10 22:00:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.163157894736842) internal successors, (411), 190 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 411 transitions. [2021-03-10 22:00:36,670 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 411 transitions. Word has length 19 [2021-03-10 22:00:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:36,670 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 411 transitions. [2021-03-10 22:00:36,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 411 transitions. [2021-03-10 22:00:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:36,670 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:36,670 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:36,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3225,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:36,871 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:36,871 INFO L82 PathProgramCache]: Analyzing trace with hash -639623766, now seen corresponding path program 426 times [2021-03-10 22:00:36,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:36,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512700923] [2021-03-10 22:00:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:37,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512700923] [2021-03-10 22:00:37,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056758538] [2021-03-10 22:00:37,200 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 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:37,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:00:37,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:37,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:37,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:37,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:37,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403834473] [2021-03-10 22:00:37,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:37,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:37,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:37,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:37,850 INFO L87 Difference]: Start difference. First operand 191 states and 411 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:38,201 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 22:00:38,432 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 22:00:38,575 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 22:00:38,863 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 22:00:39,114 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-03-10 22:00:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:39,501 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-03-10 22:00:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:39,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:39,503 INFO L225 Difference]: With dead ends: 227 [2021-03-10 22:00:39,503 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 22:00:39,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2006.5ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:00:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 22:00:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 190. [2021-03-10 22:00:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.164021164021164) internal successors, (409), 189 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 409 transitions. [2021-03-10 22:00:39,505 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 409 transitions. Word has length 19 [2021-03-10 22:00:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:39,505 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 409 transitions. [2021-03-10 22:00:39,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 409 transitions. [2021-03-10 22:00:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:39,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:39,506 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:39,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:39,706 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:39,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:39,706 INFO L82 PathProgramCache]: Analyzing trace with hash -133277500, now seen corresponding path program 427 times [2021-03-10 22:00:39,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:39,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938503687] [2021-03-10 22:00:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:40,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938503687] [2021-03-10 22:00:40,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930299991] [2021-03-10 22:00:40,002 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 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:40,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:40,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:40,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:40,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366139649] [2021-03-10 22:00:40,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:40,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:40,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:40,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:40,669 INFO L87 Difference]: Start difference. First operand 190 states and 409 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,253 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-10 22:00:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:41,775 INFO L93 Difference]: Finished difference Result 218 states and 461 transitions. [2021-03-10 22:00:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:00:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:41,778 INFO L225 Difference]: With dead ends: 218 [2021-03-10 22:00:41,778 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 22:00:41,778 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1161.4ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:00:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 22:00:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2021-03-10 22:00:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.145945945945946) internal successors, (397), 185 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 397 transitions. [2021-03-10 22:00:41,780 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 397 transitions. Word has length 19 [2021-03-10 22:00:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:41,780 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 397 transitions. [2021-03-10 22:00:41,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 397 transitions. [2021-03-10 22:00:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:41,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:41,780 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:41,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3239,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:41,982 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash 38292897, now seen corresponding path program 428 times [2021-03-10 22:00:41,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:41,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064816680] [2021-03-10 22:00:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:42,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064816680] [2021-03-10 22:00:42,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011737076] [2021-03-10 22:00:42,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:42,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:42,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:42,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:42,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:42,954 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 22:00:43,148 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:00:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:43,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:43,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:00:43,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117240935] [2021-03-10 22:00:43,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:00:43,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:00:43,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:00:43,345 INFO L87 Difference]: Start difference. First operand 186 states and 397 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:43,783 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 22:00:44,004 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 22:00:44,347 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 22:00:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:44,651 INFO L93 Difference]: Finished difference Result 202 states and 429 transitions. [2021-03-10 22:00:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:00:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:44,654 INFO L225 Difference]: With dead ends: 202 [2021-03-10 22:00:44,654 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 22:00:44,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1864.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:00:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 22:00:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 188. [2021-03-10 22:00:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.144385026737968) internal successors, (401), 187 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 401 transitions. [2021-03-10 22:00:44,656 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 401 transitions. Word has length 19 [2021-03-10 22:00:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:44,656 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 401 transitions. [2021-03-10 22:00:44,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 401 transitions. [2021-03-10 22:00:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:44,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:44,656 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:44,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:44,857 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash 325843132, now seen corresponding path program 429 times [2021-03-10 22:00:44,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:44,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572198982] [2021-03-10 22:00:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:45,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572198982] [2021-03-10 22:00:45,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843858600] [2021-03-10 22:00:45,132 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 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:45,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:00:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:45,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:45,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:45,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:45,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496043604] [2021-03-10 22:00:45,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:45,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:45,833 INFO L87 Difference]: Start difference. First operand 188 states and 401 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,274 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 22:00:46,515 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 22:00:46,914 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-10 22:00:47,298 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 22:00:47,487 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:00:47,688 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 22:00:47,958 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 22:00:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:48,194 INFO L93 Difference]: Finished difference Result 249 states and 519 transitions. [2021-03-10 22:00:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:00:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:48,196 INFO L225 Difference]: With dead ends: 249 [2021-03-10 22:00:48,196 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 22:00:48,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2546.3ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:00:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 22:00:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 193. [2021-03-10 22:00:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1666666666666665) internal successors, (416), 192 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 416 transitions. [2021-03-10 22:00:48,198 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 416 transitions. Word has length 19 [2021-03-10 22:00:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:48,198 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 416 transitions. [2021-03-10 22:00:48,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 416 transitions. [2021-03-10 22:00:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:48,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:48,198 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:48,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3253 [2021-03-10 22:00:48,398 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:48,399 INFO L82 PathProgramCache]: Analyzing trace with hash 627833412, now seen corresponding path program 430 times [2021-03-10 22:00:48,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:48,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236011682] [2021-03-10 22:00:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:48,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236011682] [2021-03-10 22:00:48,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577278458] [2021-03-10 22:00:48,686 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 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:48,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:48,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:49,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:49,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:49,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419674730] [2021-03-10 22:00:49,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:49,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:49,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:49,384 INFO L87 Difference]: Start difference. First operand 193 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:49,799 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 22:00:50,066 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 22:00:50,416 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 22:00:50,719 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 22:00:50,905 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:00:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:51,496 INFO L93 Difference]: Finished difference Result 240 states and 507 transitions. [2021-03-10 22:00:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:00:51,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:51,498 INFO L225 Difference]: With dead ends: 240 [2021-03-10 22:00:51,498 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 22:00:51,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2194.3ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:00:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 22:00:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 192. [2021-03-10 22:00:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.167539267015707) internal successors, (414), 191 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 414 transitions. [2021-03-10 22:00:51,500 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 414 transitions. Word has length 19 [2021-03-10 22:00:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:51,500 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 414 transitions. [2021-03-10 22:00:51,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 414 transitions. [2021-03-10 22:00:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:51,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:51,500 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:51,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-03-10 22:00:51,701 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1134179678, now seen corresponding path program 431 times [2021-03-10 22:00:51,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:51,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133428472] [2021-03-10 22:00:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:51,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133428472] [2021-03-10 22:00:51,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976463321] [2021-03-10 22:00:51,993 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 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:52,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:52,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:52,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:52,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:52,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:00:52,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413887884] [2021-03-10 22:00:52,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:00:52,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:00:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:52,662 INFO L87 Difference]: Start difference. First operand 192 states and 414 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,194 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:00:53,423 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 22:00:53,643 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:00:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:54,365 INFO L93 Difference]: Finished difference Result 235 states and 498 transitions. [2021-03-10 22:00:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:00:54,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:54,367 INFO L225 Difference]: With dead ends: 235 [2021-03-10 22:00:54,367 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 22:00:54,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2001.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:00:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 22:00:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 191. [2021-03-10 22:00:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.168421052631579) internal successors, (412), 190 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 412 transitions. [2021-03-10 22:00:54,369 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 412 transitions. Word has length 19 [2021-03-10 22:00:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:54,370 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 412 transitions. [2021-03-10 22:00:54,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 412 transitions. [2021-03-10 22:00:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:54,370 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:54,370 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:54,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:54,570 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:54,570 INFO L82 PathProgramCache]: Analyzing trace with hash -348955260, now seen corresponding path program 432 times [2021-03-10 22:00:54,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:54,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225927873] [2021-03-10 22:00:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:54,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225927873] [2021-03-10 22:00:54,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89252046] [2021-03-10 22:00:54,842 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 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:54,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:00:54,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:00:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:55,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:55,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:00:55,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504072191] [2021-03-10 22:00:55,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:00:55,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:55,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:00:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:00:55,503 INFO L87 Difference]: Start difference. First operand 191 states and 412 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:56,570 INFO L93 Difference]: Finished difference Result 215 states and 455 transitions. [2021-03-10 22:00:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:56,572 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:56,572 INFO L225 Difference]: With dead ends: 215 [2021-03-10 22:00:56,572 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 22:00:56,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1217.6ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:00:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 22:00:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2021-03-10 22:00:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.145945945945946) internal successors, (397), 185 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 397 transitions. [2021-03-10 22:00:56,574 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 397 transitions. Word has length 19 [2021-03-10 22:00:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:56,574 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 397 transitions. [2021-03-10 22:00:56,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 397 transitions. [2021-03-10 22:00:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:56,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:56,574 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:56,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-03-10 22:00:56,775 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash -657700315, now seen corresponding path program 433 times [2021-03-10 22:00:56,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:56,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951205341] [2021-03-10 22:00:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:57,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951205341] [2021-03-10 22:00:57,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353836304] [2021-03-10 22:00:57,071 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 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:00:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:57,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:57,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:57,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458611857] [2021-03-10 22:00:57,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:57,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:57,722 INFO L87 Difference]: Start difference. First operand 186 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:58,190 INFO L93 Difference]: Finished difference Result 195 states and 415 transitions. [2021-03-10 22:00:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:00:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:58,192 INFO L225 Difference]: With dead ends: 195 [2021-03-10 22:00:58,192 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 22:00:58,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 776.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 22:00:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 186. [2021-03-10 22:00:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.145945945945946) internal successors, (397), 185 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 397 transitions. [2021-03-10 22:00:58,194 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 397 transitions. Word has length 19 [2021-03-10 22:00:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:58,194 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 397 transitions. [2021-03-10 22:00:58,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 397 transitions. [2021-03-10 22:00:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:00:58,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:58,194 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:58,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3277,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:58,395 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1728695779, now seen corresponding path program 434 times [2021-03-10 22:00:58,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:58,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858720605] [2021-03-10 22:00:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:58,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858720605] [2021-03-10 22:00:58,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631074304] [2021-03-10 22:00:58,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:58,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:58,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:58,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:00:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:59,185 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:00:59,421 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:00:59,600 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:00:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:59,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:59,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:00:59,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188413205] [2021-03-10 22:00:59,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:00:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:00:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:59,868 INFO L87 Difference]: Start difference. First operand 186 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,533 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 22:01:00,724 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 22:01:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:01,173 INFO L93 Difference]: Finished difference Result 204 states and 433 transitions. [2021-03-10 22:01:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:01:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:01,177 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:01:01,177 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:01:01,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2025.3ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:01:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 186. [2021-03-10 22:01:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.145945945945946) internal successors, (397), 185 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 397 transitions. [2021-03-10 22:01:01,179 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 397 transitions. Word has length 19 [2021-03-10 22:01:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:01,180 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 397 transitions. [2021-03-10 22:01:01,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 397 transitions. [2021-03-10 22:01:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:01,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:01,180 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:01,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3282 [2021-03-10 22:01:01,380 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash -931960027, now seen corresponding path program 435 times [2021-03-10 22:01:01,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:01,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452741639] [2021-03-10 22:01:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452741639] [2021-03-10 22:01:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472031869] [2021-03-10 22:01:01,699 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 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:01,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:01:01,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:02,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:02,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:02,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486619084] [2021-03-10 22:01:02,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:02,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:02,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:02,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:02,440 INFO L87 Difference]: Start difference. First operand 186 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:02,808 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:01:03,050 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:01:03,249 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:01:03,422 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 22:01:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:03,916 INFO L93 Difference]: Finished difference Result 208 states and 437 transitions. [2021-03-10 22:01:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:01:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:03,918 INFO L225 Difference]: With dead ends: 208 [2021-03-10 22:01:03,918 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 22:01:03,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1716.4ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 22:01:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 186. [2021-03-10 22:01:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1405405405405404) internal successors, (396), 185 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 396 transitions. [2021-03-10 22:01:03,920 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 396 transitions. Word has length 19 [2021-03-10 22:01:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:03,920 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 396 transitions. [2021-03-10 22:01:03,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 396 transitions. [2021-03-10 22:01:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:03,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:03,920 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:04,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3285,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:04,128 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 195436066, now seen corresponding path program 436 times [2021-03-10 22:01:04,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:04,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145198591] [2021-03-10 22:01:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:04,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145198591] [2021-03-10 22:01:04,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448345968] [2021-03-10 22:01:04,435 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 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:04,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:04,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:04,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:05,015 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:01:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:05,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:05,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:05,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460142242] [2021-03-10 22:01:05,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:05,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:05,261 INFO L87 Difference]: Start difference. First operand 186 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,553 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:01:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:05,816 INFO L93 Difference]: Finished difference Result 195 states and 413 transitions. [2021-03-10 22:01:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:05,819 INFO L225 Difference]: With dead ends: 195 [2021-03-10 22:01:05,819 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 22:01:05,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1101.2ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 22:01:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 180. [2021-03-10 22:01:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1396648044692737) internal successors, (383), 179 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 383 transitions. [2021-03-10 22:01:05,821 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 383 transitions. Word has length 19 [2021-03-10 22:01:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:05,821 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 383 transitions. [2021-03-10 22:01:05,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 383 transitions. [2021-03-10 22:01:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:05,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:05,821 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:06,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3294 [2021-03-10 22:01:06,022 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1083136579, now seen corresponding path program 437 times [2021-03-10 22:01:06,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:06,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445215532] [2021-03-10 22:01:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:06,297 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:06,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445215532] [2021-03-10 22:01:06,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104109954] [2021-03-10 22:01:06,411 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 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:06,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:01:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:06,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:01:06,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:07,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:07,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:07,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630721846] [2021-03-10 22:01:07,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:07,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:07,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:07,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:07,081 INFO L87 Difference]: Start difference. First operand 180 states and 383 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:07,771 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:01:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:08,182 INFO L93 Difference]: Finished difference Result 202 states and 427 transitions. [2021-03-10 22:01:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:01:08,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:08,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:08,185 INFO L225 Difference]: With dead ends: 202 [2021-03-10 22:01:08,185 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 22:01:08,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1421.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:01:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 22:01:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 181. [2021-03-10 22:01:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.138888888888889) internal successors, (385), 180 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 385 transitions. [2021-03-10 22:01:08,186 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 385 transitions. Word has length 19 [2021-03-10 22:01:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:08,186 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 385 transitions. [2021-03-10 22:01:08,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 385 transitions. [2021-03-10 22:01:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:08,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:08,187 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:08,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:08,387 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1879872331, now seen corresponding path program 438 times [2021-03-10 22:01:08,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:08,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577230973] [2021-03-10 22:01:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:08,659 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:08,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577230973] [2021-03-10 22:01:08,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135223706] [2021-03-10 22:01:08,767 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 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:08,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:01:08,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:09,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:09,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:01:09,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290798275] [2021-03-10 22:01:09,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:01:09,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:01:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:09,520 INFO L87 Difference]: Start difference. First operand 181 states and 385 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:10,277 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:01:10,653 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 22:01:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:11,266 INFO L93 Difference]: Finished difference Result 220 states and 460 transitions. [2021-03-10 22:01:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:01:11,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 22:01:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:11,268 INFO L225 Difference]: With dead ends: 220 [2021-03-10 22:01:11,268 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 22:01:11,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1928.6ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:01:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 22:01:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 182. [2021-03-10 22:01:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.143646408839779) internal successors, (388), 181 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 388 transitions. [2021-03-10 22:01:11,270 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 388 transitions. Word has length 19 [2021-03-10 22:01:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:11,270 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 388 transitions. [2021-03-10 22:01:11,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 388 transitions. [2021-03-10 22:01:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:11,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:11,270 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:11,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3307,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:11,471 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1287698872, now seen corresponding path program 439 times [2021-03-10 22:01:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:11,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287651651] [2021-03-10 22:01:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:11,791 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:11,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287651651] [2021-03-10 22:01:11,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088633164] [2021-03-10 22:01:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:11,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:12,640 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:01:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:12,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:12,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:12,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293151309] [2021-03-10 22:01:12,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:12,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:12,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:12,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:12,766 INFO L87 Difference]: Start difference. First operand 182 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,415 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:01:13,696 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 22:01:13,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:13,947 INFO L93 Difference]: Finished difference Result 202 states and 425 transitions. [2021-03-10 22:01:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:01:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:13,950 INFO L225 Difference]: With dead ends: 202 [2021-03-10 22:01:13,950 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 22:01:13,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1712.4ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:01:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 22:01:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 180. [2021-03-10 22:01:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1396648044692737) internal successors, (383), 179 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 383 transitions. [2021-03-10 22:01:13,951 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 383 transitions. Word has length 19 [2021-03-10 22:01:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:13,952 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 383 transitions. [2021-03-10 22:01:13,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 383 transitions. [2021-03-10 22:01:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:13,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:13,952 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:14,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3316,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:14,152 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1908748699, now seen corresponding path program 440 times [2021-03-10 22:01:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:14,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205989286] [2021-03-10 22:01:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:14,486 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:14,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205989286] [2021-03-10 22:01:14,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529665652] [2021-03-10 22:01:14,600 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 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:01:14,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:14,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:15,227 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:01:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:15,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:15,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:01:15,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636364304] [2021-03-10 22:01:15,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:01:15,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:15,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:01:15,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:15,393 INFO L87 Difference]: Start difference. First operand 180 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,336 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2021-03-10 22:01:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:16,508 INFO L93 Difference]: Finished difference Result 200 states and 419 transitions. [2021-03-10 22:01:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:01:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 22:01:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:16,510 INFO L225 Difference]: With dead ends: 200 [2021-03-10 22:01:16,510 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 22:01:16,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1566.7ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 22:01:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 180. [2021-03-10 22:01:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1396648044692737) internal successors, (383), 179 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 383 transitions. [2021-03-10 22:01:16,512 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 383 transitions. Word has length 19 [2021-03-10 22:01:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:16,512 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 383 transitions. [2021-03-10 22:01:16,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 383 transitions. [2021-03-10 22:01:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:16,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:16,513 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:16,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:16,713 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:16,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1621198464, now seen corresponding path program 441 times [2021-03-10 22:01:16,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:16,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843924427] [2021-03-10 22:01:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:16,995 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843924427] [2021-03-10 22:01:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927781250] [2021-03-10 22:01:17,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:17,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:01:17,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:17,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:01:17,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:17,457 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:01:17,740 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 22:01:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:18,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:18,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:01:18,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376193395] [2021-03-10 22:01:18,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:01:18,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:18,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:01:18,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:18,032 INFO L87 Difference]: Start difference. First operand 180 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,119 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-03-10 22:01:19,293 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 22:01:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:19,506 INFO L93 Difference]: Finished difference Result 268 states and 543 transitions. [2021-03-10 22:01:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:01:19,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:19,509 INFO L225 Difference]: With dead ends: 268 [2021-03-10 22:01:19,509 INFO L226 Difference]: Without dead ends: 268 [2021-03-10 22:01:19,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1781.3ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:01:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-03-10 22:01:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 183. [2021-03-10 22:01:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.1538461538461537) internal successors, (392), 182 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 392 transitions. [2021-03-10 22:01:19,511 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 392 transitions. Word has length 19 [2021-03-10 22:01:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:19,511 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 392 transitions. [2021-03-10 22:01:19,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 392 transitions. [2021-03-10 22:01:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:19,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:19,511 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:19,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:19,711 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1319208184, now seen corresponding path program 442 times [2021-03-10 22:01:19,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:19,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135519119] [2021-03-10 22:01:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:19,996 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:20,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135519119] [2021-03-10 22:01:20,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734639156] [2021-03-10 22:01:20,109 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 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:20,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:20,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:20,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:20,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:20,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:20,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664938656] [2021-03-10 22:01:20,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:20,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:20,785 INFO L87 Difference]: Start difference. First operand 183 states and 392 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:21,444 INFO L93 Difference]: Finished difference Result 216 states and 455 transitions. [2021-03-10 22:01:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:01:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:21,447 INFO L225 Difference]: With dead ends: 216 [2021-03-10 22:01:21,447 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 22:01:21,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1032.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 22:01:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 178. [2021-03-10 22:01:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1412429378531073) internal successors, (379), 177 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 379 transitions. [2021-03-10 22:01:21,449 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 379 transitions. Word has length 19 [2021-03-10 22:01:21,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:21,449 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 379 transitions. [2021-03-10 22:01:21,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 379 transitions. [2021-03-10 22:01:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:21,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:21,449 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:21,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3340 [2021-03-10 22:01:21,663 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:21,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1944373539, now seen corresponding path program 443 times [2021-03-10 22:01:21,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:21,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930814811] [2021-03-10 22:01:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:21,949 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:22,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930814811] [2021-03-10 22:01:22,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766984839] [2021-03-10 22:01:22,063 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 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:22,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:01:22,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:22,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:01:22,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:22,480 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:01:22,692 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:01:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:22,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:22,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:22,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298149296] [2021-03-10 22:01:22,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:22,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:22,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:22,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:22,897 INFO L87 Difference]: Start difference. First operand 178 states and 379 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:24,028 INFO L93 Difference]: Finished difference Result 201 states and 425 transitions. [2021-03-10 22:01:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:01:24,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:24,031 INFO L225 Difference]: With dead ends: 201 [2021-03-10 22:01:24,031 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 22:01:24,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1569.5ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:01:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 22:01:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 179. [2021-03-10 22:01:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.140449438202247) internal successors, (381), 178 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 381 transitions. [2021-03-10 22:01:24,033 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 381 transitions. Word has length 19 [2021-03-10 22:01:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:24,033 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 381 transitions. [2021-03-10 22:01:24,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 381 transitions. [2021-03-10 22:01:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:24,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:24,033 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:24,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:24,233 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:24,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1147637787, now seen corresponding path program 444 times [2021-03-10 22:01:24,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:24,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028139153] [2021-03-10 22:01:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:24,527 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028139153] [2021-03-10 22:01:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281937617] [2021-03-10 22:01:24,633 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 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:24,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:01:24,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:01:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:25,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:25,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:01:25,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889237528] [2021-03-10 22:01:25,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:01:25,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:25,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:01:25,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:25,351 INFO L87 Difference]: Start difference. First operand 179 states and 381 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:26,564 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-03-10 22:01:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:01:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 22:01:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:26,566 INFO L225 Difference]: With dead ends: 221 [2021-03-10 22:01:26,566 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 22:01:26,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1425.5ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 22:01:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 180. [2021-03-10 22:01:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1452513966480447) internal successors, (384), 179 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 384 transitions. [2021-03-10 22:01:26,568 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 384 transitions. Word has length 19 [2021-03-10 22:01:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:26,568 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 384 transitions. [2021-03-10 22:01:26,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 384 transitions. [2021-03-10 22:01:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:26,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:26,568 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:26,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3348 [2021-03-10 22:01:26,768 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:26,769 INFO L82 PathProgramCache]: Analyzing trace with hash -20241694, now seen corresponding path program 445 times [2021-03-10 22:01:26,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:26,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219109981] [2021-03-10 22:01:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:27,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219109981] [2021-03-10 22:01:27,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798538291] [2021-03-10 22:01:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:27,858 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:01:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:27,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:27,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:27,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250665457] [2021-03-10 22:01:27,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:27,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:27,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:27,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:27,969 INFO L87 Difference]: Start difference. First operand 180 states and 384 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,946 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 22:01:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:29,046 INFO L93 Difference]: Finished difference Result 212 states and 439 transitions. [2021-03-10 22:01:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:01:29,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:29,049 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:01:29,049 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 22:01:29,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1490.2ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:01:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 22:01:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 178. [2021-03-10 22:01:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1412429378531073) internal successors, (379), 177 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 379 transitions. [2021-03-10 22:01:29,051 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 379 transitions. Word has length 19 [2021-03-10 22:01:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:29,051 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 379 transitions. [2021-03-10 22:01:29,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 379 transitions. [2021-03-10 22:01:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:29,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:29,051 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:29,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:29,252 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -641291521, now seen corresponding path program 446 times [2021-03-10 22:01:29,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:29,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856388401] [2021-03-10 22:01:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:29,540 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:29,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856388401] [2021-03-10 22:01:29,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675026824] [2021-03-10 22:01:29,648 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 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:29,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:29,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:29,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:01:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:30,110 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:01:30,511 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:01:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:30,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:30,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:01:30,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715343273] [2021-03-10 22:01:30,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:01:30,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:30,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:01:30,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:30,690 INFO L87 Difference]: Start difference. First operand 178 states and 379 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:31,196 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:01:31,527 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 22:01:31,886 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 22:01:32,330 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 22:01:32,619 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:01:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:32,853 INFO L93 Difference]: Finished difference Result 192 states and 407 transitions. [2021-03-10 22:01:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:01:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 22:01:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:32,857 INFO L225 Difference]: With dead ends: 192 [2021-03-10 22:01:32,857 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 22:01:32,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2720.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:01:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 22:01:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 178. [2021-03-10 22:01:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1412429378531073) internal successors, (379), 177 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 379 transitions. [2021-03-10 22:01:32,858 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 379 transitions. Word has length 19 [2021-03-10 22:01:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:32,858 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 379 transitions. [2021-03-10 22:01:32,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 379 transitions. [2021-03-10 22:01:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:32,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:32,859 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:33,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:33,059 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash -353741286, now seen corresponding path program 447 times [2021-03-10 22:01:33,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:33,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362184831] [2021-03-10 22:01:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:33,382 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362184831] [2021-03-10 22:01:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454807767] [2021-03-10 22:01:33,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:33,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:01:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:34,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:34,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:34,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062006722] [2021-03-10 22:01:34,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:34,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:34,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:34,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:34,240 INFO L87 Difference]: Start difference. First operand 178 states and 379 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:34,935 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:01:35,168 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 22:01:35,756 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-10 22:01:35,922 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 22:01:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:36,050 INFO L93 Difference]: Finished difference Result 261 states and 529 transitions. [2021-03-10 22:01:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:01:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:36,053 INFO L225 Difference]: With dead ends: 261 [2021-03-10 22:01:36,053 INFO L226 Difference]: Without dead ends: 261 [2021-03-10 22:01:36,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2034.3ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:01:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-03-10 22:01:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 181. [2021-03-10 22:01:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1555555555555554) internal successors, (388), 180 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 388 transitions. [2021-03-10 22:01:36,055 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 388 transitions. Word has length 19 [2021-03-10 22:01:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:36,055 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 388 transitions. [2021-03-10 22:01:36,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 388 transitions. [2021-03-10 22:01:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:36,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:36,055 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:36,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-03-10 22:01:36,256 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:36,256 INFO L82 PathProgramCache]: Analyzing trace with hash -51751006, now seen corresponding path program 448 times [2021-03-10 22:01:36,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:36,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974270726] [2021-03-10 22:01:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:36,539 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974270726] [2021-03-10 22:01:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715417809] [2021-03-10 22:01:36,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:36,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:36,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:37,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:37,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:37,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472977136] [2021-03-10 22:01:37,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:37,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:37,324 INFO L87 Difference]: Start difference. First operand 181 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:38,026 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:01:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:38,392 INFO L93 Difference]: Finished difference Result 214 states and 451 transitions. [2021-03-10 22:01:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:01:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:38,395 INFO L225 Difference]: With dead ends: 214 [2021-03-10 22:01:38,395 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 22:01:38,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1188.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 22:01:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 177. [2021-03-10 22:01:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1420454545454546) internal successors, (377), 176 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 377 transitions. [2021-03-10 22:01:38,397 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 377 transitions. Word has length 19 [2021-03-10 22:01:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:38,397 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 377 transitions. [2021-03-10 22:01:38,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 377 transitions. [2021-03-10 22:01:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:38,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:38,397 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:38,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3382,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:38,598 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:38,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2124426459, now seen corresponding path program 449 times [2021-03-10 22:01:38,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:38,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341578717] [2021-03-10 22:01:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:38,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341578717] [2021-03-10 22:01:38,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717766961] [2021-03-10 22:01:38,910 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 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:38,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:01:38,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:39,684 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:01:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:39,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:39,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:39,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333324544] [2021-03-10 22:01:39,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:39,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:39,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:39,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:39,950 INFO L87 Difference]: Start difference. First operand 177 states and 377 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:40,320 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:01:40,776 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 22:01:41,109 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 22:01:41,356 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 22:01:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:41,586 INFO L93 Difference]: Finished difference Result 225 states and 460 transitions. [2021-03-10 22:01:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:01:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:41,589 INFO L225 Difference]: With dead ends: 225 [2021-03-10 22:01:41,589 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 22:01:41,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2069.1ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 22:01:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 179. [2021-03-10 22:01:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.151685393258427) internal successors, (383), 178 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 383 transitions. [2021-03-10 22:01:41,591 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 383 transitions. Word has length 19 [2021-03-10 22:01:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:41,591 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 383 transitions. [2021-03-10 22:01:41,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 383 transitions. [2021-03-10 22:01:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:41,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:41,591 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:41,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:41,792 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1836876224, now seen corresponding path program 450 times [2021-03-10 22:01:41,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:41,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225634907] [2021-03-10 22:01:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:42,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225634907] [2021-03-10 22:01:42,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776851874] [2021-03-10 22:01:42,093 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 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:42,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:01:42,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:42,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:01:42,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:42,404 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 22:01:42,622 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 22:01:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:43,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:43,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:43,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875964427] [2021-03-10 22:01:43,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:43,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:43,078 INFO L87 Difference]: Start difference. First operand 179 states and 383 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:43,393 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 22:01:43,586 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 22:01:43,953 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 22:01:44,268 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 22:01:44,734 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 22:01:44,973 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-03-10 22:01:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:44,994 INFO L93 Difference]: Finished difference Result 269 states and 547 transitions. [2021-03-10 22:01:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:01:44,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:44,997 INFO L225 Difference]: With dead ends: 269 [2021-03-10 22:01:44,997 INFO L226 Difference]: Without dead ends: 269 [2021-03-10 22:01:44,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2401.4ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:01:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-03-10 22:01:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 184. [2021-03-10 22:01:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1748633879781423) internal successors, (398), 183 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) [2021-03-10 22:01:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 398 transitions. [2021-03-10 22:01:44,999 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 398 transitions. Word has length 19 [2021-03-10 22:01:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:44,999 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 398 transitions. [2021-03-10 22:01:44,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 398 transitions. [2021-03-10 22:01:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:44,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:44,999 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:45,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3395 [2021-03-10 22:01:45,200 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash 498055747, now seen corresponding path program 451 times [2021-03-10 22:01:45,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:45,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999087289] [2021-03-10 22:01:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:45,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999087289] [2021-03-10 22:01:45,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459877052] [2021-03-10 22:01:45,502 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 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:45,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:46,247 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:01:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:46,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:46,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:46,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632860654] [2021-03-10 22:01:46,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:46,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:46,531 INFO L87 Difference]: Start difference. First operand 184 states and 398 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:46,902 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:01:47,398 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 22:01:47,608 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-03-10 22:01:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:47,712 INFO L93 Difference]: Finished difference Result 203 states and 430 transitions. [2021-03-10 22:01:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:01:47,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:47,713 INFO L225 Difference]: With dead ends: 203 [2021-03-10 22:01:47,713 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 22:01:47,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1784.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:47,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 22:01:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2021-03-10 22:01:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-03-10 22:01:47,715 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-03-10 22:01:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:47,715 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-03-10 22:01:47,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-03-10 22:01:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:47,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:47,715 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:47,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3402 [2021-03-10 22:01:47,915 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1534885944, now seen corresponding path program 452 times [2021-03-10 22:01:47,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:47,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817812381] [2021-03-10 22:01:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:48,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817812381] [2021-03-10 22:01:48,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191893959] [2021-03-10 22:01:48,246 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 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:48,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:48,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:48,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:48,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:48,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:01:48,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215960092] [2021-03-10 22:01:48,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:01:48,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:01:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:48,961 INFO L87 Difference]: Start difference. First operand 184 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:49,321 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:01:49,617 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:01:49,784 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-03-10 22:01:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:50,277 INFO L93 Difference]: Finished difference Result 224 states and 472 transitions. [2021-03-10 22:01:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:01:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:50,281 INFO L225 Difference]: With dead ends: 224 [2021-03-10 22:01:50,281 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 22:01:50,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1657.1ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:01:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 22:01:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 183. [2021-03-10 22:01:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.1648351648351647) internal successors, (394), 182 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 394 transitions. [2021-03-10 22:01:50,283 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 394 transitions. Word has length 19 [2021-03-10 22:01:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:50,283 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 394 transitions. [2021-03-10 22:01:50,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 394 transitions. [2021-03-10 22:01:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:50,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:50,283 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:50,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3410,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:50,484 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1028539678, now seen corresponding path program 453 times [2021-03-10 22:01:50,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:50,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854465154] [2021-03-10 22:01:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:50,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854465154] [2021-03-10 22:01:50,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240305378] [2021-03-10 22:01:50,857 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 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:50,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:01:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:01:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:51,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:51,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:01:51,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072588553] [2021-03-10 22:01:51,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:01:51,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:51,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:01:51,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:51,711 INFO L87 Difference]: Start difference. First operand 183 states and 394 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:52,330 INFO L93 Difference]: Finished difference Result 219 states and 458 transitions. [2021-03-10 22:01:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:01:52,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:52,333 INFO L225 Difference]: With dead ends: 219 [2021-03-10 22:01:52,333 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 22:01:52,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1025.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 22:01:52,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 177. [2021-03-10 22:01:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1420454545454546) internal successors, (377), 176 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 377 transitions. [2021-03-10 22:01:52,335 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 377 transitions. Word has length 19 [2021-03-10 22:01:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:52,335 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 377 transitions. [2021-03-10 22:01:52,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 377 transitions. [2021-03-10 22:01:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:52,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:52,335 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:52,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3415 [2021-03-10 22:01:52,536 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1307906685, now seen corresponding path program 454 times [2021-03-10 22:01:52,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:52,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494761657] [2021-03-10 22:01:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:52,837 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:01:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:52,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494761657] [2021-03-10 22:01:52,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376714398] [2021-03-10 22:01:52,963 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 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:52,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:52,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:01:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:53,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:53,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:01:53,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523067380] [2021-03-10 22:01:53,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:01:53,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:01:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:53,744 INFO L87 Difference]: Start difference. First operand 177 states and 377 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:54,067 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:01:54,407 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 22:01:54,769 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:01:54,932 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-03-10 22:01:55,190 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 22:01:55,518 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-10 22:01:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:55,926 INFO L93 Difference]: Finished difference Result 200 states and 423 transitions. [2021-03-10 22:01:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:01:55,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 22:01:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:55,929 INFO L225 Difference]: With dead ends: 200 [2021-03-10 22:01:55,929 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 22:01:55,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2208.8ms TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:01:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 22:01:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2021-03-10 22:01:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1412429378531073) internal successors, (379), 177 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 379 transitions. [2021-03-10 22:01:55,931 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 379 transitions. Word has length 19 [2021-03-10 22:01:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:55,931 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 379 transitions. [2021-03-10 22:01:55,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 379 transitions. [2021-03-10 22:01:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:55,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:55,931 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:56,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3420,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:56,132 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:56,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:56,132 INFO L82 PathProgramCache]: Analyzing trace with hash -511170933, now seen corresponding path program 455 times [2021-03-10 22:01:56,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:56,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175557671] [2021-03-10 22:01:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:56,429 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 22:01:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:56,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175557671] [2021-03-10 22:01:56,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468059849] [2021-03-10 22:01:56,545 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 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:56,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:01:56,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:56,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:01:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:57,033 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 22:01:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:57,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:57,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:01:57,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591597346] [2021-03-10 22:01:57,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:01:57,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:57,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:01:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:57,424 INFO L87 Difference]: Start difference. First operand 178 states and 379 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,998 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 22:01:58,170 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-10 22:01:58,347 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 22:01:58,502 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-03-10 22:01:58,775 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 22:01:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:59,354 INFO L93 Difference]: Finished difference Result 220 states and 460 transitions. [2021-03-10 22:01:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:01:59,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:01:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:59,356 INFO L225 Difference]: With dead ends: 220 [2021-03-10 22:01:59,356 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 22:01:59,356 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2250.9ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:01:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 22:01:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 179. [2021-03-10 22:01:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.146067415730337) internal successors, (382), 178 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 382 transitions. [2021-03-10 22:01:59,358 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 382 transitions. Word has length 19 [2021-03-10 22:01:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:59,358 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 382 transitions. [2021-03-10 22:01:59,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 382 transitions. [2021-03-10 22:01:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:01:59,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:59,358 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:59,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3425,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:59,558 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:59,559 INFO L82 PathProgramCache]: Analyzing trace with hash 616225160, now seen corresponding path program 456 times [2021-03-10 22:01:59,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:59,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286619605] [2021-03-10 22:01:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:59,867 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 22:01:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:59,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286619605] [2021-03-10 22:01:59,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539222311] [2021-03-10 22:01:59,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:00,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:02:00,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:00,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:00,809 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:02:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:00,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:00,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:00,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473427185] [2021-03-10 22:02:00,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:00,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:00,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:00,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:00,947 INFO L87 Difference]: Start difference. First operand 179 states and 382 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:01,303 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:02:01,578 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 22:02:01,731 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:01,897 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 22:02:02,146 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 22:02:02,467 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 22:02:02,932 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 22:02:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:03,093 INFO L93 Difference]: Finished difference Result 205 states and 430 transitions. [2021-03-10 22:02:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:02:03,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:03,095 INFO L225 Difference]: With dead ends: 205 [2021-03-10 22:02:03,095 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 22:02:03,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2721.3ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:02:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 22:02:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 177. [2021-03-10 22:02:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1420454545454546) internal successors, (377), 176 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 377 transitions. [2021-03-10 22:02:03,097 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 377 transitions. Word has length 19 [2021-03-10 22:02:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:03,097 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 377 transitions. [2021-03-10 22:02:03,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 377 transitions. [2021-03-10 22:02:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:03,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:03,098 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:03,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3433 [2021-03-10 22:02:03,298 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:03,298 INFO L82 PathProgramCache]: Analyzing trace with hash 282725568, now seen corresponding path program 457 times [2021-03-10 22:02:03,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:03,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080073586] [2021-03-10 22:02:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:03,636 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:02:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080073586] [2021-03-10 22:02:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322233502] [2021-03-10 22:02:03,764 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 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:03,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:04,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:04,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:04,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210319203] [2021-03-10 22:02:04,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:04,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:04,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:04,586 INFO L87 Difference]: Start difference. First operand 177 states and 377 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,931 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:02:05,173 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 22:02:05,325 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:05,499 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 22:02:05,811 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:02:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:06,419 INFO L93 Difference]: Finished difference Result 235 states and 488 transitions. [2021-03-10 22:02:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:02:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:06,421 INFO L225 Difference]: With dead ends: 235 [2021-03-10 22:02:06,421 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 22:02:06,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2202.0ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:02:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 22:02:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 180. [2021-03-10 22:02:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1508379888268156) internal successors, (385), 179 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 385 transitions. [2021-03-10 22:02:06,423 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 385 transitions. Word has length 19 [2021-03-10 22:02:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:06,423 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 385 transitions. [2021-03-10 22:02:06,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 385 transitions. [2021-03-10 22:02:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:06,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:06,424 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:06,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3441 [2021-03-10 22:02:06,624 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:06,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:06,624 INFO L82 PathProgramCache]: Analyzing trace with hash 584715848, now seen corresponding path program 458 times [2021-03-10 22:02:06,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:06,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168965077] [2021-03-10 22:02:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:06,938 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:02:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:07,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168965077] [2021-03-10 22:02:07,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115684090] [2021-03-10 22:02:07,062 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 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:07,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:07,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:07,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:07,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:07,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729759386] [2021-03-10 22:02:07,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:07,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:07,836 INFO L87 Difference]: Start difference. First operand 180 states and 385 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,338 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 22:02:08,477 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:08,744 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:02:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:09,346 INFO L93 Difference]: Finished difference Result 212 states and 446 transitions. [2021-03-10 22:02:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:02:09,349 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:09,349 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:02:09,349 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 22:02:09,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1742.5ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:02:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 22:02:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 174. [2021-03-10 22:02:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.1445086705202314) internal successors, (371), 173 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:09,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 371 transitions. [2021-03-10 22:02:09,351 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 371 transitions. Word has length 19 [2021-03-10 22:02:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:09,351 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 371 transitions. [2021-03-10 22:02:09,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 371 transitions. [2021-03-10 22:02:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:09,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:09,352 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:09,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3450,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:09,552 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:09,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:09,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1200409370, now seen corresponding path program 459 times [2021-03-10 22:02:09,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:09,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591738807] [2021-03-10 22:02:09,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:09,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591738807] [2021-03-10 22:02:09,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883641624] [2021-03-10 22:02:09,889 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 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:09,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:02:09,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:02:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:10,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:10,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:10,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706691003] [2021-03-10 22:02:10,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:10,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:10,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:10,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:10,702 INFO L87 Difference]: Start difference. First operand 174 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:11,581 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-03-10 22:02:11,794 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:02:12,219 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:02:12,498 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 22:02:12,666 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 22:02:13,385 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 22:02:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:13,551 INFO L93 Difference]: Finished difference Result 253 states and 515 transitions. [2021-03-10 22:02:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:02:13,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:13,553 INFO L225 Difference]: With dead ends: 253 [2021-03-10 22:02:13,553 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 22:02:13,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2811.9ms TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:02:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 22:02:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 180. [2021-03-10 22:02:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-03-10 22:02:13,555 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-03-10 22:02:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:13,555 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-03-10 22:02:13,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-03-10 22:02:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:13,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:13,555 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:13,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3455,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:13,755 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:13,756 INFO L82 PathProgramCache]: Analyzing trace with hash -898419090, now seen corresponding path program 460 times [2021-03-10 22:02:13,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:13,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481047070] [2021-03-10 22:02:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:14,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481047070] [2021-03-10 22:02:14,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662276447] [2021-03-10 22:02:14,079 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 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:14,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:14,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:14,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:14,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:14,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:14,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258878664] [2021-03-10 22:02:14,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:14,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:14,897 INFO L87 Difference]: Start difference. First operand 180 states and 387 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:15,264 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:15,460 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-03-10 22:02:15,669 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 22:02:16,061 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:02:16,274 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-03-10 22:02:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:16,800 INFO L93 Difference]: Finished difference Result 220 states and 463 transitions. [2021-03-10 22:02:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:02:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:16,803 INFO L225 Difference]: With dead ends: 220 [2021-03-10 22:02:16,803 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 22:02:16,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2244.0ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:02:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 22:02:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 179. [2021-03-10 22:02:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.162921348314607) internal successors, (385), 178 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 385 transitions. [2021-03-10 22:02:16,805 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 385 transitions. Word has length 19 [2021-03-10 22:02:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:16,805 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 385 transitions. [2021-03-10 22:02:16,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 385 transitions. [2021-03-10 22:02:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:16,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:16,806 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:17,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:17,006 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash -392072824, now seen corresponding path program 461 times [2021-03-10 22:02:17,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:17,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581196952] [2021-03-10 22:02:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:17,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581196952] [2021-03-10 22:02:17,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019584304] [2021-03-10 22:02:17,351 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 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:17,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:17,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:17,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:02:17,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:18,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:18,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:18,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851777342] [2021-03-10 22:02:18,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:18,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:18,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:18,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:18,111 INFO L87 Difference]: Start difference. First operand 179 states and 385 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,468 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:18,670 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-03-10 22:02:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:19,158 INFO L93 Difference]: Finished difference Result 209 states and 438 transitions. [2021-03-10 22:02:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:02:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:19,161 INFO L225 Difference]: With dead ends: 209 [2021-03-10 22:02:19,161 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 22:02:19,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1345.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:02:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 22:02:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 170. [2021-03-10 22:02:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1479289940828403) internal successors, (363), 169 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 363 transitions. [2021-03-10 22:02:19,162 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 363 transitions. Word has length 19 [2021-03-10 22:02:19,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:19,163 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 363 transitions. [2021-03-10 22:02:19,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 363 transitions. [2021-03-10 22:02:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:19,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:19,163 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:19,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3469 [2021-03-10 22:02:19,363 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:19,363 INFO L82 PathProgramCache]: Analyzing trace with hash -220502427, now seen corresponding path program 462 times [2021-03-10 22:02:19,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:19,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800757419] [2021-03-10 22:02:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800757419] [2021-03-10 22:02:19,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353613926] [2021-03-10 22:02:19,733 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 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:19,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:02:19,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:19,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 22:02:19,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:20,133 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 22:02:20,366 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 22:02:20,604 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:02:20,841 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 22:02:21,357 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 22:02:21,628 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 41 [2021-03-10 22:02:21,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,698 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-10 22:02:21,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 39 [2021-03-10 22:02:21,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,743 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:21,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,776 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:21,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,809 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:21,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,844 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 22:02:21,848 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,876 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:21,879 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,909 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:21,913 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,943 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 22:02:21,950 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:21,979 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:21,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:21,983 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,006 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 22:02:22,013 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:22,023 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,054 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:22,058 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:22,068 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,098 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:22,102 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,130 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:22,134 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,163 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 41 [2021-03-10 22:02:22,166 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:22,177 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,206 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 31 [2021-03-10 22:02:22,210 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,237 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:22,240 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,272 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 41 [2021-03-10 22:02:22,276 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,335 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-10 22:02:22,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 34 [2021-03-10 22:02:22,342 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,372 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:22,375 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:22,385 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:22,394 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,413 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 22:02:22,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 36 [2021-03-10 22:02:22,417 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:22,647 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 22:02:22,648 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.6 percent of original size [2021-03-10 22:02:22,648 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-03-10 22:02:22,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:22,651 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 3 variables, input treesize:1670, output treesize:56 [2021-03-10 22:02:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:22,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:22,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-03-10 22:02:22,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684799176] [2021-03-10 22:02:22,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:02:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:02:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:02:22,952 INFO L87 Difference]: Start difference. First operand 170 states and 363 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:23,353 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 22:02:23,768 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 22:02:24,231 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:02:24,670 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2021-03-10 22:02:25,124 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-10 22:02:25,589 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-10 22:02:25,979 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2021-03-10 22:02:26,205 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 22:02:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:26,272 INFO L93 Difference]: Finished difference Result 195 states and 406 transitions. [2021-03-10 22:02:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:02:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:26,275 INFO L225 Difference]: With dead ends: 195 [2021-03-10 22:02:26,275 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:02:26,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4327.5ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:02:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:02:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 171. [2021-03-10 22:02:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1294117647058823) internal successors, (362), 170 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 362 transitions. [2021-03-10 22:02:26,277 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 362 transitions. Word has length 19 [2021-03-10 22:02:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:26,277 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 362 transitions. [2021-03-10 22:02:26,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 362 transitions. [2021-03-10 22:02:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:26,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:26,277 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:26,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3474 [2021-03-10 22:02:26,478 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:26,478 INFO L82 PathProgramCache]: Analyzing trace with hash 67047808, now seen corresponding path program 463 times [2021-03-10 22:02:26,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:26,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670247586] [2021-03-10 22:02:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:26,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670247586] [2021-03-10 22:02:26,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792193777] [2021-03-10 22:02:26,812 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 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:26,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:26,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:27,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:27,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:27,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365512431] [2021-03-10 22:02:27,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:27,654 INFO L87 Difference]: Start difference. First operand 171 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:28,247 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:28,498 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-03-10 22:02:28,738 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 22:02:29,066 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:02:29,227 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 22:02:29,500 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 22:02:29,669 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 22:02:30,472 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:02:30,785 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:02:31,163 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:02:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:31,173 INFO L93 Difference]: Finished difference Result 251 states and 506 transitions. [2021-03-10 22:02:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:02:31,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:31,176 INFO L225 Difference]: With dead ends: 251 [2021-03-10 22:02:31,176 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 22:02:31,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 3540.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:02:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 22:02:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 174. [2021-03-10 22:02:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.1560693641618496) internal successors, (373), 173 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 373 transitions. [2021-03-10 22:02:31,178 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 373 transitions. Word has length 19 [2021-03-10 22:02:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:31,178 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 373 transitions. [2021-03-10 22:02:31,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 373 transitions. [2021-03-10 22:02:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:31,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:31,179 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:31,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3502 [2021-03-10 22:02:31,379 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:31,379 INFO L82 PathProgramCache]: Analyzing trace with hash 369038088, now seen corresponding path program 464 times [2021-03-10 22:02:31,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:31,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328491601] [2021-03-10 22:02:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:31,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328491601] [2021-03-10 22:02:31,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694814751] [2021-03-10 22:02:31,766 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 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:31,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:31,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:31,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:32,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:32,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:32,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250516241] [2021-03-10 22:02:32,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:32,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:32,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:32,661 INFO L87 Difference]: Start difference. First operand 174 states and 373 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:33,015 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:33,234 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-03-10 22:02:33,470 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 22:02:33,806 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:02:33,966 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 22:02:34,324 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 22:02:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:34,884 INFO L93 Difference]: Finished difference Result 222 states and 466 transitions. [2021-03-10 22:02:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:02:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:34,888 INFO L225 Difference]: With dead ends: 222 [2021-03-10 22:02:34,888 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 22:02:34,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2393.1ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:02:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 22:02:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 173. [2021-03-10 22:02:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1569767441860463) internal successors, (371), 172 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 371 transitions. [2021-03-10 22:02:34,890 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 371 transitions. Word has length 19 [2021-03-10 22:02:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:34,890 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 371 transitions. [2021-03-10 22:02:34,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 371 transitions. [2021-03-10 22:02:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:34,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:34,890 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:35,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:35,090 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:35,091 INFO L82 PathProgramCache]: Analyzing trace with hash 875384354, now seen corresponding path program 465 times [2021-03-10 22:02:35,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:35,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558917522] [2021-03-10 22:02:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558917522] [2021-03-10 22:02:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479457436] [2021-03-10 22:02:35,454 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 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:35,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:35,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:36,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:36,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:36,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609065262] [2021-03-10 22:02:36,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:36,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:36,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:36,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:36,274 INFO L87 Difference]: Start difference. First operand 173 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:36,685 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:36,908 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-03-10 22:02:37,160 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-03-10 22:02:37,447 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:02:37,813 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 22:02:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:38,389 INFO L93 Difference]: Finished difference Result 216 states and 455 transitions. [2021-03-10 22:02:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:02:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:38,392 INFO L225 Difference]: With dead ends: 216 [2021-03-10 22:02:38,392 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 22:02:38,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2379.7ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:02:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 22:02:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 172. [2021-03-10 22:02:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1578947368421053) internal successors, (369), 171 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 369 transitions. [2021-03-10 22:02:38,394 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 369 transitions. Word has length 19 [2021-03-10 22:02:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:38,394 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 369 transitions. [2021-03-10 22:02:38,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 369 transitions. [2021-03-10 22:02:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:38,394 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:38,394 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:38,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3516 [2021-03-10 22:02:38,595 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash -607750584, now seen corresponding path program 466 times [2021-03-10 22:02:38,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:38,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013664005] [2021-03-10 22:02:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:38,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013664005] [2021-03-10 22:02:38,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036099309] [2021-03-10 22:02:38,920 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 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:38,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:38,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:38,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:38,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:39,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:39,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504626932] [2021-03-10 22:02:39,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:39,713 INFO L87 Difference]: Start difference. First operand 172 states and 369 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:40,166 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 22:02:40,591 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-10 22:02:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:40,997 INFO L93 Difference]: Finished difference Result 196 states and 412 transitions. [2021-03-10 22:02:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:41,001 INFO L225 Difference]: With dead ends: 196 [2021-03-10 22:02:41,001 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 22:02:41,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1511.5ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:02:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 22:02:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 167. [2021-03-10 22:02:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1325301204819276) internal successors, (354), 166 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 354 transitions. [2021-03-10 22:02:41,003 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 354 transitions. Word has length 19 [2021-03-10 22:02:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:41,003 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 354 transitions. [2021-03-10 22:02:41,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 354 transitions. [2021-03-10 22:02:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:41,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:41,003 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:41,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:41,203 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:41,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1039160257, now seen corresponding path program 467 times [2021-03-10 22:02:41,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:41,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361585727] [2021-03-10 22:02:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:41,544 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:02:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:41,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361585727] [2021-03-10 22:02:41,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322204828] [2021-03-10 22:02:41,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:41,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:02:41,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:41,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:02:41,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:42,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:42,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:42,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155082400] [2021-03-10 22:02:42,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:42,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:42,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:42,562 INFO L87 Difference]: Start difference. First operand 167 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:42,870 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:02:43,313 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-03-10 22:02:43,692 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:02:44,014 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-10 22:02:44,304 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 22:02:44,499 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 22:02:44,802 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-10 22:02:44,995 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 22:02:45,369 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 22:02:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:45,715 INFO L93 Difference]: Finished difference Result 200 states and 419 transitions. [2021-03-10 22:02:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:02:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 [2021-03-10 22:02:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:45,718 INFO L225 Difference]: With dead ends: 200 [2021-03-10 22:02:45,718 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 22:02:45,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 3328.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:02:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 22:02:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2021-03-10 22:02:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1325301204819276) internal successors, (354), 166 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 354 transitions. [2021-03-10 22:02:45,720 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 354 transitions. Word has length 19 [2021-03-10 22:02:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:45,720 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 354 transitions. [2021-03-10 22:02:45,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 354 transitions. [2021-03-10 22:02:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:45,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:45,721 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:45,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:45,921 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:45,921 INFO L82 PathProgramCache]: Analyzing trace with hash -242424505, now seen corresponding path program 468 times [2021-03-10 22:02:45,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:45,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667528968] [2021-03-10 22:02:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:46,255 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:02:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:46,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667528968] [2021-03-10 22:02:46,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507664893] [2021-03-10 22:02:46,398 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 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:46,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:02:46,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:02:46,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:46,640 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:02:46,810 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 22:02:46,990 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 22:02:47,223 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 22:02:47,455 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 22:02:47,683 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 22:02:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:47,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:47,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884184766] [2021-03-10 22:02:47,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:47,836 INFO L87 Difference]: Start difference. First operand 167 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:48,186 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 22:02:48,373 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:02:48,616 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 22:02:49,173 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 22:02:49,593 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 22:02:50,045 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:02:50,337 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 22:02:50,659 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 22:02:50,846 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-03-10 22:02:51,300 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 22:02:51,645 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 22:02:52,119 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 22:02:52,494 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:02:52,712 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-03-10 22:02:53,012 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-10 22:02:53,412 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-10 22:02:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:53,704 INFO L93 Difference]: Finished difference Result 214 states and 442 transitions. [2021-03-10 22:02:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:02:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:02:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:53,707 INFO L225 Difference]: With dead ends: 214 [2021-03-10 22:02:53,707 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 22:02:53,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 6255.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:02:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 22:02:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 167. [2021-03-10 22:02:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 166 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 353 transitions. [2021-03-10 22:02:53,709 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 353 transitions. Word has length 19 [2021-03-10 22:02:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:53,709 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 353 transitions. [2021-03-10 22:02:53,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 353 transitions. [2021-03-10 22:02:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:02:53,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:53,709 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:53,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:53,924 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash 884971588, now seen corresponding path program 469 times [2021-03-10 22:02:53,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:53,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311516797] [2021-03-10 22:02:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:54,265 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 22:02:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:54,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311516797] [2021-03-10 22:02:54,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370255269] [2021-03-10 22:02:54,416 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 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:02:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:55,299 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:02:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:55,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:55,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:02:55,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745414934] [2021-03-10 22:02:55,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:02:55,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:02:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:55,451 INFO L87 Difference]: Start difference. First operand 167 states and 353 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:55,804 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:02:56,365 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 22:02:56,554 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 22:02:56,746 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 22:02:56,953 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 22:02:57,183 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:02:57,408 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 22:02:57,677 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 22:02:57,936 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 22:02:58,159 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 22:02:58,385 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 22:02:58,630 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 22:02:58,864 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 22:02:59,133 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 22:02:59,503 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:02:59,857 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 22:03:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:00,017 INFO L93 Difference]: Finished difference Result 204 states and 422 transitions. [2021-03-10 22:03:00,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:03:00,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:00,019 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:03:00,019 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 22:03:00,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4891.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:03:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 22:03:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 165. [2021-03-10 22:03:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-03-10 22:03:00,021 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 19 [2021-03-10 22:03:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:00,021 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-03-10 22:03:00,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-03-10 22:03:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:00,022 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:00,022 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:00,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:00,222 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash 56726524, now seen corresponding path program 470 times [2021-03-10 22:03:00,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:00,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392322936] [2021-03-10 22:03:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:00,560 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-03-10 22:03:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:00,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392322936] [2021-03-10 22:03:00,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546728289] [2021-03-10 22:03:00,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:00,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:00,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:00,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:03:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:00,921 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 22:03:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:01,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:01,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:03:01,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853442517] [2021-03-10 22:03:01,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:03:01,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:01,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:03:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:01,707 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:02,068 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 22:03:02,304 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:03:02,453 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-03-10 22:03:02,953 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 22:03:03,482 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-03-10 22:03:03,878 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 22:03:04,110 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 22:03:04,621 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:03:04,931 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:03:05,159 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 22:03:05,356 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:03:05,779 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 22:03:05,959 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 22:03:06,260 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:03:06,493 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 22:03:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:06,841 INFO L93 Difference]: Finished difference Result 226 states and 462 transitions. [2021-03-10 22:03:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:03:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:06,844 INFO L225 Difference]: With dead ends: 226 [2021-03-10 22:03:06,844 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 22:03:06,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5443.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:03:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 22:03:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 171. [2021-03-10 22:03:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1294117647058823) internal successors, (362), 170 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 362 transitions. [2021-03-10 22:03:06,846 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 362 transitions. Word has length 19 [2021-03-10 22:03:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:06,846 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 362 transitions. [2021-03-10 22:03:06,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 362 transitions. [2021-03-10 22:03:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:06,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:06,847 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:07,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3546 [2021-03-10 22:03:07,047 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:07,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1391317854, now seen corresponding path program 471 times [2021-03-10 22:03:07,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:07,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392133141] [2021-03-10 22:03:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:07,388 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-03-10 22:03:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:07,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392133141] [2021-03-10 22:03:07,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304333368] [2021-03-10 22:03:07,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:07,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:03:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:03:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:08,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:08,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:03:08,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825556894] [2021-03-10 22:03:08,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:03:08,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:03:08,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:03:08,447 INFO L87 Difference]: Start difference. First operand 171 states and 362 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:08,847 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:03:09,224 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 22:03:09,458 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 22:03:09,706 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 22:03:09,915 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 22:03:10,142 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 22:03:10,339 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:03:10,501 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-03-10 22:03:10,816 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-10 22:03:11,181 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 22:03:11,371 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 22:03:11,614 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 22:03:11,930 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:03:12,158 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 22:03:12,904 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-03-10 22:03:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:12,926 INFO L93 Difference]: Finished difference Result 249 states and 510 transitions. [2021-03-10 22:03:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:03:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:12,930 INFO L225 Difference]: With dead ends: 249 [2021-03-10 22:03:12,930 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 22:03:12,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4274.6ms TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:03:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 22:03:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 170. [2021-03-10 22:03:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1301775147928996) internal successors, (360), 169 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 360 transitions. [2021-03-10 22:03:12,932 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 360 transitions. Word has length 19 [2021-03-10 22:03:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:12,932 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 360 transitions. [2021-03-10 22:03:12,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 360 transitions. [2021-03-10 22:03:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:12,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:12,932 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:13,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3554,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:13,133 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash 853462276, now seen corresponding path program 472 times [2021-03-10 22:03:13,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:13,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404820380] [2021-03-10 22:03:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:13,449 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 22:03:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:13,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404820380] [2021-03-10 22:03:13,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351161568] [2021-03-10 22:03:13,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:13,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:13,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:03:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:14,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:14,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:03:14,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391091242] [2021-03-10 22:03:14,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:03:14,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:03:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:14,451 INFO L87 Difference]: Start difference. First operand 170 states and 360 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,110 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 22:03:15,300 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 22:03:15,542 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 22:03:15,754 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:03:15,902 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-03-10 22:03:16,077 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 22:03:16,358 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 22:03:16,543 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 22:03:16,812 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 22:03:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:17,127 INFO L93 Difference]: Finished difference Result 214 states and 445 transitions. [2021-03-10 22:03:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:03:17,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:17,131 INFO L225 Difference]: With dead ends: 214 [2021-03-10 22:03:17,131 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 22:03:17,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2873.2ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:03:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 22:03:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-03-10 22:03:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1226993865030677) internal successors, (346), 163 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 346 transitions. [2021-03-10 22:03:17,133 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 346 transitions. Word has length 19 [2021-03-10 22:03:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:17,133 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 346 transitions. [2021-03-10 22:03:17,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 346 transitions. [2021-03-10 22:03:17,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:17,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:17,133 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:17,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:17,334 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:17,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1426408414, now seen corresponding path program 473 times [2021-03-10 22:03:17,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:17,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552389495] [2021-03-10 22:03:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:17,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552389495] [2021-03-10 22:03:17,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523066202] [2021-03-10 22:03:17,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:17,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:03:17,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:17,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:03:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:18,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:18,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:03:18,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957108945] [2021-03-10 22:03:18,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:03:18,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:18,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:03:18,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:18,597 INFO L87 Difference]: Start difference. First operand 164 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,235 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 22:03:19,470 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 22:03:19,723 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-10 22:03:20,052 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:03:20,249 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 22:03:20,598 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:03:20,941 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 22:03:21,255 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 22:03:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:22,000 INFO L93 Difference]: Finished difference Result 233 states and 475 transitions. [2021-03-10 22:03:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:03:22,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:22,003 INFO L225 Difference]: With dead ends: 233 [2021-03-10 22:03:22,003 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 22:03:22,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3107.7ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:03:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 22:03:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 169. [2021-03-10 22:03:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.130952380952381) internal successors, (358), 168 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 358 transitions. [2021-03-10 22:03:22,005 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 358 transitions. Word has length 19 [2021-03-10 22:03:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:22,005 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 358 transitions. [2021-03-10 22:03:22,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 358 transitions. [2021-03-10 22:03:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:22,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:22,005 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:22,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-03-10 22:03:22,206 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash -91817084, now seen corresponding path program 474 times [2021-03-10 22:03:22,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:22,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936857425] [2021-03-10 22:03:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:22,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936857425] [2021-03-10 22:03:22,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148126477] [2021-03-10 22:03:22,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:22,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:03:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:03:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:23,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:23,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:03:23,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109975335] [2021-03-10 22:03:23,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:03:23,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:23,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:03:23,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:23,525 INFO L87 Difference]: Start difference. First operand 169 states and 358 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,140 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 22:03:24,363 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 22:03:24,876 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 22:03:25,038 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-03-10 22:03:25,379 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:03:25,701 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 22:03:25,958 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-10 22:03:26,153 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 22:03:27,269 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 22:03:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:27,290 INFO L93 Difference]: Finished difference Result 248 states and 507 transitions. [2021-03-10 22:03:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:03:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:03:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:27,294 INFO L225 Difference]: With dead ends: 248 [2021-03-10 22:03:27,294 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 22:03:27,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3431.5ms TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:03:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 22:03:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 168. [2021-03-10 22:03:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1317365269461077) internal successors, (356), 167 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 356 transitions. [2021-03-10 22:03:27,296 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 356 transitions. Word has length 19 [2021-03-10 22:03:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:27,296 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 356 transitions. [2021-03-10 22:03:27,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 356 transitions. [2021-03-10 22:03:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:03:27,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:27,296 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:27,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:27,496 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash -629672662, now seen corresponding path program 475 times [2021-03-10 22:03:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:27,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170747487] [2021-03-10 22:03:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:27,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170747487] [2021-03-10 22:03:27,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691050417] [2021-03-10 22:03:27,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:03:27,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:28,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:28,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:03:28,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591775069] [2021-03-10 22:03:28,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:03:28,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:03:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:28,818 INFO L87 Difference]: Start difference. First operand 168 states and 356 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:29,373 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 22:03:29,655 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 22:03:29,816 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-03-10 22:03:30,085 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 22:03:30,391 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 22:03:30,742 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:03:30,964 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 Received shutdown request... [2021-03-10 22:03:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:03:31,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3587,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:31,791 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:03:31,795 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:03:31,795 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:03:31 BasicIcfg [2021-03-10 22:03:31,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:03:31,796 INFO L168 Benchmark]: Toolchain (without parser) took 872415.38 ms. Allocated memory was 255.9 MB in the beginning and 499.1 MB in the end (delta: 243.3 MB). Free memory was 236.4 MB in the beginning and 346.0 MB in the end (delta: -109.6 MB). Peak memory consumption was 136.0 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:31,796 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:03:31,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.47 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:31,796 INFO L168 Benchmark]: Boogie Preprocessor took 12.42 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:31,796 INFO L168 Benchmark]: RCFGBuilder took 332.41 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 229.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:31,796 INFO L168 Benchmark]: TraceAbstraction took 872041.76 ms. Allocated memory was 255.9 MB in the beginning and 499.1 MB in the end (delta: 243.3 MB). Free memory was 229.5 MB in the beginning and 346.0 MB in the end (delta: -116.5 MB). Peak memory consumption was 128.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:03:31,796 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.47 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.42 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 332.41 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 229.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 872041.76 ms. Allocated memory was 255.9 MB in the beginning and 499.1 MB in the end (delta: 243.3 MB). Free memory was 229.5 MB in the beginning and 346.0 MB in the end (delta: -116.5 MB). Peak memory consumption was 128.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was constructing difference of abstraction (168states) and FLOYD_HOARE automaton (currently 23 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (153 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 871975.9ms, OverallIterations: 481, TraceHistogramMax: 4, EmptinessCheckTime: 129.4ms, AutomataDifference: 438199.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13308 SDtfs, 26195 SDslu, 98742 SDs, 0 SdLazy, 156457 SolverSat, 9152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81120.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16723 GetRequests, 5612 SyntacticMatches, 1 SemanticMatches, 11110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46815 ImplicationChecksByTransitivity, 545268.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=228occurred in iteration=269, InterpolantAutomatonStates: 7512, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 913.1ms AutomataMinimizationTime, 480 MinimizatonAttempts, 17378 StatesRemovedByMinimization, 478 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2029.8ms SsaConstructionTime, 7272.2ms SatisfiabilityAnalysisTime, 320144.5ms InterpolantComputationTime, 17167 NumberOfCodeBlocks, 17167 NumberOfCodeBlocksAsserted, 1667 NumberOfCheckSat, 16211 ConstructedInterpolants, 0 QuantifiedInterpolants, 245666 SizeOfPredicates, 4373 NumberOfNonLiveVariables, 43664 ConjunctsInSsa, 15092 ConjunctsInUnsatCore, 956 InterpolantComputations, 6 PerfectInterpolantSequences, 1606/11955 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