/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:37:02,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:37:02,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:37:02,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:37:02,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:37:02,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:37:02,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:37:02,524 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-Separate.epf [2021-05-22 02:37:02,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:37:02,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:37:02,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:37:02,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:37:02,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:37:02,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:37:02,562 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:37:02,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:37:02,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:37:02,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:37:02,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:37:02,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:37:02,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:37:02,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:37:02,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:37:02,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:37:02,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:37:02,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:37:02,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:37:02,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:37:02,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:37:02,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:37:02,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:37:02,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:37:02,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:37:02,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:37:02,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:37:02,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:37:02,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:37:02,565 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:37:02,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:37:02,566 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:37:02,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:37:02,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:37:02,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:37:02,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:37:02,857 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:37:02,858 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:37:02,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2021-05-22 02:37:02,859 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2021-05-22 02:37:03,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:37:03,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:37:03,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:37:03,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:37:03,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:37:03,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:37:03,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:37:03,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:37:03,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:37:03,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/1) ... [2021-05-22 02:37:03,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:37:03,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:37:03,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:37:03,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:37:03,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (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 [2021-05-22 02:37:03,217 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:37:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:37:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:37:03,218 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:37:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:37:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:37:03,218 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:37:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:37:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:37:03,219 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:37:03,445 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:37:03,445 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:37:03,447 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:37:03 BoogieIcfgContainer [2021-05-22 02:37:03,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:37:03,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:37:03,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:37:03,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:37:03,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:37:03" (1/2) ... [2021-05-22 02:37:03,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac2ee3a and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:37:03, skipping insertion in model container [2021-05-22 02:37:03,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:37:03" (2/2) ... [2021-05-22 02:37:03,453 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2021-05-22 02:37:03,468 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:37:03,468 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:37:03,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:37:03,469 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:37:03,533 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-22 02:37:03,551 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:37:03,567 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:37:03,568 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:37:03,568 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:37:03,568 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:37:03,568 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:37:03,568 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:37:03,568 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:37:03,568 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:37:03,577 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-22 02:37:03,586 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:37:03,609 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:03,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:03,610 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1891492345, now seen corresponding path program 1 times [2021-05-22 02:37:03,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:03,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803963570] [2021-05-22 02:37:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:03,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:03,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803963570] [2021-05-22 02:37:03,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803963570] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:37:03,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:37:03,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:37:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720507261] [2021-05-22 02:37:03,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:37:03,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:37:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:37:03,787 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:03,817 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2021-05-22 02:37:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:37:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:37:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:03,828 INFO L225 Difference]: With dead ends: 58 [2021-05-22 02:37:03,828 INFO L226 Difference]: Without dead ends: 43 [2021-05-22 02:37:03,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:37:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-22 02:37:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-05-22 02:37:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-05-22 02:37:03,871 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-05-22 02:37:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:03,872 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-05-22 02:37:03,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-05-22 02:37:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:37:03,874 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:03,874 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:03,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:37:03,875 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:03,879 INFO L82 PathProgramCache]: Analyzing trace with hash -672639493, now seen corresponding path program 1 times [2021-05-22 02:37:03,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:03,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441543534] [2021-05-22 02:37:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:03,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:03,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441543534] [2021-05-22 02:37:03,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441543534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:03,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792929805] [2021-05-22 02:37:03,971 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 [2021-05-22 02:37:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:37:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:04,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792929805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:04,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:04,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-22 02:37:04,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826340485] [2021-05-22 02:37:04,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:37:04,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:04,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:37:04,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:37:04,130 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:04,249 INFO L93 Difference]: Finished difference Result 64 states and 109 transitions. [2021-05-22 02:37:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:37:04,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:37:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:04,251 INFO L225 Difference]: With dead ends: 64 [2021-05-22 02:37:04,251 INFO L226 Difference]: Without dead ends: 64 [2021-05-22 02:37:04,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:37:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-22 02:37:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-05-22 02:37:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2021-05-22 02:37:04,258 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2021-05-22 02:37:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:04,259 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2021-05-22 02:37:04,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2021-05-22 02:37:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:37:04,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:04,260 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:04,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-22 02:37:04,483 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1676307169, now seen corresponding path program 2 times [2021-05-22 02:37:04,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:04,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912011290] [2021-05-22 02:37:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:04,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912011290] [2021-05-22 02:37:04,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912011290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:37:04,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:37:04,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:37:04,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002346210] [2021-05-22 02:37:04,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:37:04,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:37:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:37:04,562 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:04,634 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-05-22 02:37:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:37:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:37:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:04,642 INFO L225 Difference]: With dead ends: 51 [2021-05-22 02:37:04,642 INFO L226 Difference]: Without dead ends: 49 [2021-05-22 02:37:04,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:37:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-22 02:37:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-05-22 02:37:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-05-22 02:37:04,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-05-22 02:37:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:04,647 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-05-22 02:37:04,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-05-22 02:37:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:37:04,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:04,648 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:04,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:37:04,648 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1210697401, now seen corresponding path program 1 times [2021-05-22 02:37:04,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:04,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670462910] [2021-05-22 02:37:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:04,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:04,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670462910] [2021-05-22 02:37:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670462910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:04,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257507086] [2021-05-22 02:37:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:04,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:37:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:04,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257507086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:04,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:04,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-22 02:37:04,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625832206] [2021-05-22 02:37:04,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:37:04,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:37:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:37:04,823 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-05-22 02:37:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:04,837 INFO L93 Difference]: Finished difference Result 97 states and 174 transitions. [2021-05-22 02:37:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:37:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 19 [2021-05-22 02:37:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:04,839 INFO L225 Difference]: With dead ends: 97 [2021-05-22 02:37:04,839 INFO L226 Difference]: Without dead ends: 76 [2021-05-22 02:37:04,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:37:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-22 02:37:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-05-22 02:37:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.896551724137931) internal successors, (110), 58 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) [2021-05-22 02:37:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2021-05-22 02:37:04,847 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2021-05-22 02:37:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:04,847 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2021-05-22 02:37:04,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-05-22 02:37:04,847 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2021-05-22 02:37:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:37:04,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:04,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:05,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:05,053 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:05,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1830185403, now seen corresponding path program 2 times [2021-05-22 02:37:05,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:05,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611387972] [2021-05-22 02:37:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:05,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:05,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611387972] [2021-05-22 02:37:05,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611387972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600063409] [2021-05-22 02:37:05,138 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 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 [2021-05-22 02:37:05,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:37:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:05,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:37:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:05,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600063409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:05,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:05,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-22 02:37:05,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288390522] [2021-05-22 02:37:05,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:37:05,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:37:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:37:05,351 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:05,678 INFO L93 Difference]: Finished difference Result 174 states and 309 transitions. [2021-05-22 02:37:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:37:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:37:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:05,681 INFO L225 Difference]: With dead ends: 174 [2021-05-22 02:37:05,681 INFO L226 Difference]: Without dead ends: 168 [2021-05-22 02:37:05,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:37:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-22 02:37:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 68. [2021-05-22 02:37:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-05-22 02:37:05,699 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2021-05-22 02:37:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:05,699 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-05-22 02:37:05,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-05-22 02:37:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:37:05,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:05,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:05,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:05,901 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1099819493, now seen corresponding path program 3 times [2021-05-22 02:37:05,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:05,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703794207] [2021-05-22 02:37:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:05,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:05,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703794207] [2021-05-22 02:37:05,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703794207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:05,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146896220] [2021-05-22 02:37:05,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:05,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:37:05,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:05,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:37:05,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:06,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146896220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:06,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:06,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-22 02:37:06,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379620943] [2021-05-22 02:37:06,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:37:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:37:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:37:06,126 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-05-22 02:37:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:06,420 INFO L93 Difference]: Finished difference Result 146 states and 268 transitions. [2021-05-22 02:37:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:37:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 21 [2021-05-22 02:37:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:06,425 INFO L225 Difference]: With dead ends: 146 [2021-05-22 02:37:06,425 INFO L226 Difference]: Without dead ends: 142 [2021-05-22 02:37:06,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:37:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-22 02:37:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2021-05-22 02:37:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 66 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2021-05-22 02:37:06,439 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2021-05-22 02:37:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:06,439 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2021-05-22 02:37:06,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-05-22 02:37:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2021-05-22 02:37:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:37:06,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:06,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:06,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:06,659 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1243736697, now seen corresponding path program 4 times [2021-05-22 02:37:06,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:06,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929948333] [2021-05-22 02:37:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:06,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929948333] [2021-05-22 02:37:06,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929948333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576520838] [2021-05-22 02:37:06,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:37:06,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:37:06,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:06,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:37:06,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:06,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576520838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:06,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:06,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-22 02:37:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47363479] [2021-05-22 02:37:06,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:37:06,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:37:06,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:37:06,836 INFO L87 Difference]: Start difference. First operand 67 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-22 02:37:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:06,863 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2021-05-22 02:37:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:37:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:37:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:06,865 INFO L225 Difference]: With dead ends: 163 [2021-05-22 02:37:06,865 INFO L226 Difference]: Without dead ends: 136 [2021-05-22 02:37:06,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:37:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-22 02:37:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-05-22 02:37:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-05-22 02:37:06,882 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2021-05-22 02:37:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:06,883 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-05-22 02:37:06,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-22 02:37:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-05-22 02:37:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:37:06,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:06,884 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:07,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-22 02:37:07,088 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash 304168059, now seen corresponding path program 5 times [2021-05-22 02:37:07,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:07,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094140068] [2021-05-22 02:37:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:07,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:07,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094140068] [2021-05-22 02:37:07,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094140068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:07,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209555253] [2021-05-22 02:37:07,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:07,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:37:07,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:37:07,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:07,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209555253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:07,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:07,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-22 02:37:07,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327235582] [2021-05-22 02:37:07,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:37:07,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:37:07,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:37:07,420 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:07,949 INFO L93 Difference]: Finished difference Result 365 states and 692 transitions. [2021-05-22 02:37:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:37:07,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:37:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:07,954 INFO L225 Difference]: With dead ends: 365 [2021-05-22 02:37:07,954 INFO L226 Difference]: Without dead ends: 335 [2021-05-22 02:37:07,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:37:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-22 02:37:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 93. [2021-05-22 02:37:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2021-05-22 02:37:07,960 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2021-05-22 02:37:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:07,960 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2021-05-22 02:37:07,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2021-05-22 02:37:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:37:07,962 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:07,962 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:08,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:08,179 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:08,179 INFO L82 PathProgramCache]: Analyzing trace with hash -413112599, now seen corresponding path program 6 times [2021-05-22 02:37:08,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:08,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285914922] [2021-05-22 02:37:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:08,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:08,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285914922] [2021-05-22 02:37:08,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285914922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:08,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880140562] [2021-05-22 02:37:08,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:08,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:37:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:37:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:08,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880140562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:08,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:08,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-22 02:37:08,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047086562] [2021-05-22 02:37:08,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:37:08,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:08,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:37:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:37:08,427 INFO L87 Difference]: Start difference. First operand 93 states and 180 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:08,930 INFO L93 Difference]: Finished difference Result 240 states and 454 transitions. [2021-05-22 02:37:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:37:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:37:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:08,931 INFO L225 Difference]: With dead ends: 240 [2021-05-22 02:37:08,931 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:37:08,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:37:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:37:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2021-05-22 02:37:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2021-05-22 02:37:08,936 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2021-05-22 02:37:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:08,936 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2021-05-22 02:37:08,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2021-05-22 02:37:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:37:08,937 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:08,937 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:09,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:09,149 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash -675082951, now seen corresponding path program 7 times [2021-05-22 02:37:09,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:09,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616407469] [2021-05-22 02:37:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:09,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:09,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616407469] [2021-05-22 02:37:09,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616407469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:09,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284263027] [2021-05-22 02:37:09,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:09,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:37:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:09,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284263027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:09,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:09,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-22 02:37:09,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092332912] [2021-05-22 02:37:09,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:37:09,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:09,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:37:09,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:37:09,353 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:09,383 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2021-05-22 02:37:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:37:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:37:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:09,385 INFO L225 Difference]: With dead ends: 222 [2021-05-22 02:37:09,385 INFO L226 Difference]: Without dead ends: 189 [2021-05-22 02:37:09,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:37:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-22 02:37:09,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-05-22 02:37:09,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.075862068965517) internal successors, (301), 145 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2021-05-22 02:37:09,393 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2021-05-22 02:37:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:09,393 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2021-05-22 02:37:09,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2021-05-22 02:37:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:37:09,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:09,398 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:09,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-22 02:37:09,609 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash 199593531, now seen corresponding path program 8 times [2021-05-22 02:37:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:09,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161683867] [2021-05-22 02:37:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:09,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:09,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161683867] [2021-05-22 02:37:09,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161683867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:09,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731498221] [2021-05-22 02:37:09,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:09,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:37:09,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:09,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:37:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:09,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731498221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:09,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:09,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-22 02:37:09,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904392780] [2021-05-22 02:37:09,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:37:09,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:37:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:37:09,957 INFO L87 Difference]: Start difference. First operand 146 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:10,831 INFO L93 Difference]: Finished difference Result 562 states and 1078 transitions. [2021-05-22 02:37:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:37:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:37:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:10,833 INFO L225 Difference]: With dead ends: 562 [2021-05-22 02:37:10,834 INFO L226 Difference]: Without dead ends: 496 [2021-05-22 02:37:10,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 742.8ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:37:10,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-05-22 02:37:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 115. [2021-05-22 02:37:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9824561403508771) internal successors, (226), 114 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2021-05-22 02:37:10,841 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2021-05-22 02:37:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:10,841 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2021-05-22 02:37:10,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2021-05-22 02:37:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:37:10,842 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:10,842 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:11,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:11,064 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash -827661843, now seen corresponding path program 9 times [2021-05-22 02:37:11,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:11,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067543523] [2021-05-22 02:37:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:11,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067543523] [2021-05-22 02:37:11,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067543523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260796288] [2021-05-22 02:37:11,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:11,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:37:11,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:11,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:37:11,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:11,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260796288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:11,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:11,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-05-22 02:37:11,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924986205] [2021-05-22 02:37:11,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:37:11,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:37:11,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:37:11,361 INFO L87 Difference]: Start difference. First operand 115 states and 226 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:12,151 INFO L93 Difference]: Finished difference Result 352 states and 678 transitions. [2021-05-22 02:37:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:37:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:37:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:12,153 INFO L225 Difference]: With dead ends: 352 [2021-05-22 02:37:12,153 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:37:12,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 725.9ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:37:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:37:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2021-05-22 02:37:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 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) [2021-05-22 02:37:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2021-05-22 02:37:12,159 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2021-05-22 02:37:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:12,159 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2021-05-22 02:37:12,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2021-05-22 02:37:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:37:12,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:12,160 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:12,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:12,383 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:12,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1908010745, now seen corresponding path program 10 times [2021-05-22 02:37:12,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:12,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392853787] [2021-05-22 02:37:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:12,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392853787] [2021-05-22 02:37:12,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392853787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202056870] [2021-05-22 02:37:12,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:12,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:37:12,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:12,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:37:12,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:12,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202056870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:12,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:12,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-22 02:37:12,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671629760] [2021-05-22 02:37:12,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:37:12,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:37:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:37:12,539 INFO L87 Difference]: Start difference. First operand 103 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:12,582 INFO L93 Difference]: Finished difference Result 281 states and 544 transitions. [2021-05-22 02:37:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:37:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-22 02:37:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:12,584 INFO L225 Difference]: With dead ends: 281 [2021-05-22 02:37:12,584 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:37:12,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:37:12,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:37:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-05-22 02:37:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.097297297297297) internal successors, (388), 185 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) [2021-05-22 02:37:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2021-05-22 02:37:12,590 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2021-05-22 02:37:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:12,590 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2021-05-22 02:37:12,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2021-05-22 02:37:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:37:12,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:12,590 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:12,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-22 02:37:12,805 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash -556785925, now seen corresponding path program 11 times [2021-05-22 02:37:12,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:12,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363124016] [2021-05-22 02:37:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:12,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:12,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363124016] [2021-05-22 02:37:12,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363124016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:12,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632479152] [2021-05-22 02:37:12,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:12,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:37:12,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:12,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:37:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:13,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632479152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:13,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:13,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-05-22 02:37:13,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060809602] [2021-05-22 02:37:13,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:37:13,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:13,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:37:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:37:13,199 INFO L87 Difference]: Start difference. First operand 186 states and 388 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:14,394 INFO L93 Difference]: Finished difference Result 787 states and 1520 transitions. [2021-05-22 02:37:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:37:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:37:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:14,397 INFO L225 Difference]: With dead ends: 787 [2021-05-22 02:37:14,397 INFO L226 Difference]: Without dead ends: 679 [2021-05-22 02:37:14,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 982.7ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:37:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-05-22 02:37:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 137. [2021-05-22 02:37:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0) internal successors, (272), 136 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2021-05-22 02:37:14,405 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2021-05-22 02:37:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:14,406 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2021-05-22 02:37:14,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2021-05-22 02:37:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:37:14,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:14,407 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:14,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-22 02:37:14,629 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:14,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:14,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1177967345, now seen corresponding path program 12 times [2021-05-22 02:37:14,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:14,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356149693] [2021-05-22 02:37:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:14,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356149693] [2021-05-22 02:37:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356149693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328027877] [2021-05-22 02:37:14,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:14,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-22 02:37:14,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:37:14,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:14,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328027877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:14,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:14,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-05-22 02:37:14,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81584905] [2021-05-22 02:37:14,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:37:14,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:14,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:37:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:37:14,990 INFO L87 Difference]: Start difference. First operand 137 states and 272 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:15,962 INFO L93 Difference]: Finished difference Result 486 states and 946 transitions. [2021-05-22 02:37:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:37:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:37:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:15,970 INFO L225 Difference]: With dead ends: 486 [2021-05-22 02:37:15,970 INFO L226 Difference]: Without dead ends: 482 [2021-05-22 02:37:15,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:37:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-05-22 02:37:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2021-05-22 02:37:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2021-05-22 02:37:15,979 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2021-05-22 02:37:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:15,979 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2021-05-22 02:37:15,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2021-05-22 02:37:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:37:15,981 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:15,981 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:16,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-22 02:37:16,196 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 876826553, now seen corresponding path program 13 times [2021-05-22 02:37:16,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:16,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957486012] [2021-05-22 02:37:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:16,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:16,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957486012] [2021-05-22 02:37:16,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957486012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:16,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133967180] [2021-05-22 02:37:16,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:16,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:37:16,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:16,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133967180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:16,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:16,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-22 02:37:16,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897415404] [2021-05-22 02:37:16,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:37:16,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:16,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:37:16,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:37:16,386 INFO L87 Difference]: Start difference. First operand 121 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:16,448 INFO L93 Difference]: Finished difference Result 340 states and 661 transitions. [2021-05-22 02:37:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:37:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-22 02:37:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:16,450 INFO L225 Difference]: With dead ends: 340 [2021-05-22 02:37:16,451 INFO L226 Difference]: Without dead ends: 295 [2021-05-22 02:37:16,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:37:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-22 02:37:16,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2021-05-22 02:37:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.111111111111111) internal successors, (475), 225 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:16,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2021-05-22 02:37:16,457 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2021-05-22 02:37:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:16,457 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2021-05-22 02:37:16,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2021-05-22 02:37:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:37:16,458 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:16,458 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:16,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:16,673 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash -891441477, now seen corresponding path program 14 times [2021-05-22 02:37:16,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:16,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110268397] [2021-05-22 02:37:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:16,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110268397] [2021-05-22 02:37:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110268397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801728550] [2021-05-22 02:37:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:16,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:37:16,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:16,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:37:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:17,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801728550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:17,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:17,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-22 02:37:17,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878474284] [2021-05-22 02:37:17,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-22 02:37:17,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:17,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-22 02:37:17,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:37:17,157 INFO L87 Difference]: Start difference. First operand 226 states and 475 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:18,837 INFO L93 Difference]: Finished difference Result 1040 states and 2018 transitions. [2021-05-22 02:37:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:37:18,837 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:37:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:18,840 INFO L225 Difference]: With dead ends: 1040 [2021-05-22 02:37:18,840 INFO L226 Difference]: Without dead ends: 884 [2021-05-22 02:37:18,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1464.3ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:37:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-05-22 02:37:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 159. [2021-05-22 02:37:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0126582278481013) internal successors, (318), 158 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2021-05-22 02:37:18,850 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2021-05-22 02:37:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:18,850 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2021-05-22 02:37:18,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2021-05-22 02:37:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:37:18,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:18,851 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:19,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:37:19,073 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash 843829749, now seen corresponding path program 15 times [2021-05-22 02:37:19,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:19,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068311010] [2021-05-22 02:37:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:19,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:19,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068311010] [2021-05-22 02:37:19,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068311010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:19,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229467043] [2021-05-22 02:37:19,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:19,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-22 02:37:19,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:19,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:37:19,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:19,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229467043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:19,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:19,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-05-22 02:37:19,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092105109] [2021-05-22 02:37:19,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:37:19,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:37:19,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:37:19,474 INFO L87 Difference]: Start difference. First operand 159 states and 318 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:20,877 INFO L93 Difference]: Finished difference Result 642 states and 1258 transitions. [2021-05-22 02:37:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:37:20,877 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:37:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:20,879 INFO L225 Difference]: With dead ends: 642 [2021-05-22 02:37:20,879 INFO L226 Difference]: Without dead ends: 638 [2021-05-22 02:37:20,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1305.5ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-05-22 02:37:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-22 02:37:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2021-05-22 02:37:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-05-22 02:37:20,887 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2021-05-22 02:37:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:20,887 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-05-22 02:37:20,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-05-22 02:37:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 02:37:20,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:20,887 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:21,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-22 02:37:21,118 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1395388281, now seen corresponding path program 16 times [2021-05-22 02:37:21,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:21,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123181686] [2021-05-22 02:37:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:21,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:21,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123181686] [2021-05-22 02:37:21,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123181686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:21,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512341982] [2021-05-22 02:37:21,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:37:21,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:37:21,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:21,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:37:21,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:21,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512341982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:21,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:21,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-22 02:37:21,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385715805] [2021-05-22 02:37:21,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:37:21,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:21,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:37:21,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:37:21,309 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:21,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:21,390 INFO L93 Difference]: Finished difference Result 399 states and 778 transitions. [2021-05-22 02:37:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:37:21,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-22 02:37:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:21,392 INFO L225 Difference]: With dead ends: 399 [2021-05-22 02:37:21,392 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:37:21,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:37:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:37:21,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2021-05-22 02:37:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.120754716981132) internal successors, (562), 265 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2021-05-22 02:37:21,398 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2021-05-22 02:37:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:21,398 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2021-05-22 02:37:21,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:21,398 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2021-05-22 02:37:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:21,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:21,399 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:21,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:21,622 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1201339771, now seen corresponding path program 17 times [2021-05-22 02:37:21,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:21,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468260051] [2021-05-22 02:37:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:21,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:21,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468260051] [2021-05-22 02:37:21,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468260051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:21,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217149299] [2021-05-22 02:37:21,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:21,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-22 02:37:21,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-22 02:37:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:22,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217149299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:22,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:22,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:37:22,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054767353] [2021-05-22 02:37:22,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:37:22,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:22,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:37:22,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:37:22,149 INFO L87 Difference]: Start difference. First operand 266 states and 562 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-05-22 02:37:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:24,330 INFO L93 Difference]: Finished difference Result 1321 states and 2572 transitions. [2021-05-22 02:37:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-22 02:37:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:37:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:24,335 INFO L225 Difference]: With dead ends: 1321 [2021-05-22 02:37:24,335 INFO L226 Difference]: Without dead ends: 1111 [2021-05-22 02:37:24,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 1896.4ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-05-22 02:37:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-05-22 02:37:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 181. [2021-05-22 02:37:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.022222222222222) internal successors, (364), 180 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2021-05-22 02:37:24,347 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2021-05-22 02:37:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:24,347 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2021-05-22 02:37:24,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-05-22 02:37:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2021-05-22 02:37:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-22 02:37:24,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:24,348 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:24,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:24,563 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:24,563 INFO L82 PathProgramCache]: Analyzing trace with hash -860600583, now seen corresponding path program 18 times [2021-05-22 02:37:24,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:24,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966984191] [2021-05-22 02:37:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:24,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:24,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966984191] [2021-05-22 02:37:24,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966984191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:24,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494619282] [2021-05-22 02:37:24,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:24,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-22 02:37:24,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:24,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-22 02:37:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:25,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494619282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:25,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:25,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-05-22 02:37:25,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313070223] [2021-05-22 02:37:25,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-22 02:37:25,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-22 02:37:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:37:25,075 INFO L87 Difference]: Start difference. First operand 181 states and 364 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:26,942 INFO L93 Difference]: Finished difference Result 820 states and 1614 transitions. [2021-05-22 02:37:26,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 02:37:26,942 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-22 02:37:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:26,945 INFO L225 Difference]: With dead ends: 820 [2021-05-22 02:37:26,945 INFO L226 Difference]: Without dead ends: 816 [2021-05-22 02:37:26,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 1777.6ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-05-22 02:37:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-22 02:37:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2021-05-22 02:37:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2021-05-22 02:37:26,953 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2021-05-22 02:37:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:26,953 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2021-05-22 02:37:26,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2021-05-22 02:37:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-22 02:37:26,954 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:26,954 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:27,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:27,169 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1781494215, now seen corresponding path program 19 times [2021-05-22 02:37:27,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:27,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345475904] [2021-05-22 02:37:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:27,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:27,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345475904] [2021-05-22 02:37:27,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345475904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:27,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945055706] [2021-05-22 02:37:27,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:37:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945055706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:27,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:27,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-05-22 02:37:27,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071916198] [2021-05-22 02:37:27,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:37:27,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:37:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:37:27,390 INFO L87 Difference]: Start difference. First operand 157 states and 317 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:27,486 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-05-22 02:37:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:37:27,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-22 02:37:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:27,487 INFO L225 Difference]: With dead ends: 458 [2021-05-22 02:37:27,487 INFO L226 Difference]: Without dead ends: 401 [2021-05-22 02:37:27,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:37:27,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-22 02:37:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2021-05-22 02:37:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1278688524590166) internal successors, (649), 305 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2021-05-22 02:37:27,494 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2021-05-22 02:37:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:27,494 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2021-05-22 02:37:27,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2021-05-22 02:37:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:37:27,495 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:27,495 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:27,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-22 02:37:27,719 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2145072325, now seen corresponding path program 20 times [2021-05-22 02:37:27,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:27,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635860614] [2021-05-22 02:37:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:27,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:27,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635860614] [2021-05-22 02:37:27,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635860614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:27,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708836930] [2021-05-22 02:37:27,902 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 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 [2021-05-22 02:37:27,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:37:27,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:37:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:28,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708836930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:28,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:28,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:37:28,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559567670] [2021-05-22 02:37:28,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:37:28,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:37:28,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:37:28,385 INFO L87 Difference]: Start difference. First operand 306 states and 649 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:31,073 INFO L93 Difference]: Finished difference Result 1630 states and 3182 transitions. [2021-05-22 02:37:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-22 02:37:31,073 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:37:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:31,077 INFO L225 Difference]: With dead ends: 1630 [2021-05-22 02:37:31,077 INFO L226 Difference]: Without dead ends: 1360 [2021-05-22 02:37:31,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 2489.8ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-05-22 02:37:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-05-22 02:37:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 203. [2021-05-22 02:37:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.0297029702970297) internal successors, (410), 202 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) [2021-05-22 02:37:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2021-05-22 02:37:31,088 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2021-05-22 02:37:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:31,088 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2021-05-22 02:37:31,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2021-05-22 02:37:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-22 02:37:31,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:31,089 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:31,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-22 02:37:31,305 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:31,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:31,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1689827837, now seen corresponding path program 21 times [2021-05-22 02:37:31,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:31,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219170852] [2021-05-22 02:37:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:31,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:31,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219170852] [2021-05-22 02:37:31,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219170852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:31,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662636982] [2021-05-22 02:37:31,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:37:31,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-22 02:37:31,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:31,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:37:31,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:31,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662636982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:31,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:31,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-05-22 02:37:31,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694609241] [2021-05-22 02:37:31,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-22 02:37:31,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:31,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-22 02:37:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:37:31,794 INFO L87 Difference]: Start difference. First operand 203 states and 410 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:34,185 INFO L93 Difference]: Finished difference Result 1020 states and 2014 transitions. [2021-05-22 02:37:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-22 02:37:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-22 02:37:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:34,188 INFO L225 Difference]: With dead ends: 1020 [2021-05-22 02:37:34,188 INFO L226 Difference]: Without dead ends: 1016 [2021-05-22 02:37:34,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2237.8ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-05-22 02:37:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-05-22 02:37:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2021-05-22 02:37:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0402298850574714) internal successors, (355), 174 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2021-05-22 02:37:34,195 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2021-05-22 02:37:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:34,195 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2021-05-22 02:37:34,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2021-05-22 02:37:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-22 02:37:34,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:34,196 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:34,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:34,412 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:34,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash -753013767, now seen corresponding path program 22 times [2021-05-22 02:37:34,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:34,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83128316] [2021-05-22 02:37:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:34,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83128316] [2021-05-22 02:37:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83128316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116413319] [2021-05-22 02:37:34,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:34,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:37:34,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:37:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:34,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116413319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:34,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:34,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-05-22 02:37:34,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133233114] [2021-05-22 02:37:34,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:37:34,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:37:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:37:34,630 INFO L87 Difference]: Start difference. First operand 175 states and 355 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:34,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:34,731 INFO L93 Difference]: Finished difference Result 517 states and 1012 transitions. [2021-05-22 02:37:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:37:34,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-22 02:37:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:34,732 INFO L225 Difference]: With dead ends: 517 [2021-05-22 02:37:34,732 INFO L226 Difference]: Without dead ends: 454 [2021-05-22 02:37:34,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:37:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-22 02:37:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2021-05-22 02:37:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.1333333333333333) internal successors, (736), 345 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2021-05-22 02:37:34,738 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2021-05-22 02:37:34,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:34,738 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2021-05-22 02:37:34,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2021-05-22 02:37:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-22 02:37:34,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:34,739 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:34,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-22 02:37:34,953 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash -819472389, now seen corresponding path program 23 times [2021-05-22 02:37:34,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:34,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070730891] [2021-05-22 02:37:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:35,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:35,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070730891] [2021-05-22 02:37:35,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070730891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:35,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7849419] [2021-05-22 02:37:35,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:35,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-22 02:37:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:37:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:35,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7849419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:35,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:35,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-05-22 02:37:35,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580628396] [2021-05-22 02:37:35,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-22 02:37:35,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-22 02:37:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:37:35,685 INFO L87 Difference]: Start difference. First operand 346 states and 736 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:39,051 INFO L93 Difference]: Finished difference Result 1967 states and 3848 transitions. [2021-05-22 02:37:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-22 02:37:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-05-22 02:37:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:39,056 INFO L225 Difference]: With dead ends: 1967 [2021-05-22 02:37:39,056 INFO L226 Difference]: Without dead ends: 1631 [2021-05-22 02:37:39,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 3073.2ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-05-22 02:37:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-05-22 02:37:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 225. [2021-05-22 02:37:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 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) [2021-05-22 02:37:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-05-22 02:37:39,068 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2021-05-22 02:37:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:39,068 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-05-22 02:37:39,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-05-22 02:37:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-22 02:37:39,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:39,069 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:39,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:39,290 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:39,290 INFO L82 PathProgramCache]: Analyzing trace with hash 522332929, now seen corresponding path program 24 times [2021-05-22 02:37:39,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:39,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643287340] [2021-05-22 02:37:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:39,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643287340] [2021-05-22 02:37:39,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643287340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606614499] [2021-05-22 02:37:39,414 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 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 [2021-05-22 02:37:39,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-22 02:37:39,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:37:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:39,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606614499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:39,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:39,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-05-22 02:37:39,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299797162] [2021-05-22 02:37:39,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:37:39,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:37:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:37:39,870 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 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) [2021-05-22 02:37:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:42,777 INFO L93 Difference]: Finished difference Result 1242 states and 2458 transitions. [2021-05-22 02:37:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-22 02:37:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 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) Word has length 49 [2021-05-22 02:37:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:42,780 INFO L225 Difference]: With dead ends: 1242 [2021-05-22 02:37:42,781 INFO L226 Difference]: Without dead ends: 1238 [2021-05-22 02:37:42,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8651 ImplicationChecksByTransitivity, 2785.4ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-05-22 02:37:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-05-22 02:37:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2021-05-22 02:37:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.046875) internal successors, (393), 192 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2021-05-22 02:37:42,787 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2021-05-22 02:37:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:42,787 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2021-05-22 02:37:42,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 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) [2021-05-22 02:37:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2021-05-22 02:37:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-22 02:37:42,788 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:42,788 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:42,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-22 02:37:42,988 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:42,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1838205113, now seen corresponding path program 25 times [2021-05-22 02:37:42,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:42,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629848727] [2021-05-22 02:37:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:43,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:43,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629848727] [2021-05-22 02:37:43,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629848727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:43,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280828313] [2021-05-22 02:37:43,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:37:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:43,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:37:43,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:43,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280828313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:43,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:43,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-05-22 02:37:43,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830915211] [2021-05-22 02:37:43,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:37:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:37:43,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:37:43,247 INFO L87 Difference]: Start difference. First operand 193 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:43,386 INFO L93 Difference]: Finished difference Result 576 states and 1129 transitions. [2021-05-22 02:37:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:37:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-22 02:37:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:43,389 INFO L225 Difference]: With dead ends: 576 [2021-05-22 02:37:43,389 INFO L226 Difference]: Without dead ends: 507 [2021-05-22 02:37:43,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:37:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-22 02:37:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2021-05-22 02:37:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.137662337662338) internal successors, (823), 385 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2021-05-22 02:37:43,395 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2021-05-22 02:37:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:43,396 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2021-05-22 02:37:43,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2021-05-22 02:37:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-22 02:37:43,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:43,397 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:43,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-22 02:37:43,605 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:43,605 INFO L82 PathProgramCache]: Analyzing trace with hash 987816891, now seen corresponding path program 26 times [2021-05-22 02:37:43,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:43,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496569024] [2021-05-22 02:37:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:43,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:43,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496569024] [2021-05-22 02:37:43,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496569024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:43,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612283875] [2021-05-22 02:37:43,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:43,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:37:43,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:43,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:37:43,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:44,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612283875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:44,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:44,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-05-22 02:37:44,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743021529] [2021-05-22 02:37:44,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-22 02:37:44,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:44,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-22 02:37:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:37:44,439 INFO L87 Difference]: Start difference. First operand 386 states and 823 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:48,624 INFO L93 Difference]: Finished difference Result 2332 states and 4570 transitions. [2021-05-22 02:37:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-22 02:37:48,624 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-05-22 02:37:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:48,629 INFO L225 Difference]: With dead ends: 2332 [2021-05-22 02:37:48,629 INFO L226 Difference]: Without dead ends: 1924 [2021-05-22 02:37:48,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12484 ImplicationChecksByTransitivity, 3787.5ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-05-22 02:37:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-05-22 02:37:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 247. [2021-05-22 02:37:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.040650406504065) internal successors, (502), 246 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) [2021-05-22 02:37:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2021-05-22 02:37:48,638 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2021-05-22 02:37:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:48,639 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2021-05-22 02:37:48,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2021-05-22 02:37:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-22 02:37:48,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:48,640 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:48,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-22 02:37:48,853 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:48,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1237739003, now seen corresponding path program 27 times [2021-05-22 02:37:48,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:48,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411920331] [2021-05-22 02:37:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:48,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:48,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411920331] [2021-05-22 02:37:48,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411920331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:48,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778086489] [2021-05-22 02:37:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:37:49,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-22 02:37:49,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:37:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:49,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778086489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:49,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:49,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-05-22 02:37:49,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722355981] [2021-05-22 02:37:49,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:37:49,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:37:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:37:49,507 INFO L87 Difference]: Start difference. First operand 247 states and 502 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:53,177 INFO L93 Difference]: Finished difference Result 1486 states and 2946 transitions. [2021-05-22 02:37:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-05-22 02:37:53,177 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-05-22 02:37:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:53,180 INFO L225 Difference]: With dead ends: 1486 [2021-05-22 02:37:53,181 INFO L226 Difference]: Without dead ends: 1482 [2021-05-22 02:37:53,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12394 ImplicationChecksByTransitivity, 3446.6ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-05-22 02:37:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-05-22 02:37:53,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2021-05-22 02:37:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.052380952380952) internal successors, (431), 210 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) [2021-05-22 02:37:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2021-05-22 02:37:53,189 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2021-05-22 02:37:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:53,189 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2021-05-22 02:37:53,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2021-05-22 02:37:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-22 02:37:53,190 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:53,190 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:53,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:53,413 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash -818551687, now seen corresponding path program 28 times [2021-05-22 02:37:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:53,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227014706] [2021-05-22 02:37:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:53,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:53,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227014706] [2021-05-22 02:37:53,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227014706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:53,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245593658] [2021-05-22 02:37:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:53,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:37:53,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:53,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:37:53,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:53,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245593658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:53,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:53,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-05-22 02:37:53,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627434509] [2021-05-22 02:37:53,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:37:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:53,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:37:53,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:37:53,688 INFO L87 Difference]: Start difference. First operand 211 states and 431 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:37:53,841 INFO L93 Difference]: Finished difference Result 635 states and 1246 transitions. [2021-05-22 02:37:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:37:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-22 02:37:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:37:53,844 INFO L225 Difference]: With dead ends: 635 [2021-05-22 02:37:53,844 INFO L226 Difference]: Without dead ends: 560 [2021-05-22 02:37:53,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:37:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-22 02:37:53,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2021-05-22 02:37:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1411764705882352) internal successors, (910), 425 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2021-05-22 02:37:53,850 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2021-05-22 02:37:53,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:37:53,850 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2021-05-22 02:37:53,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:37:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2021-05-22 02:37:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-22 02:37:53,851 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:37:53,851 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:37:54,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-22 02:37:54,065 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:37:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:37:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash -249778565, now seen corresponding path program 29 times [2021-05-22 02:37:54,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:37:54,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200754312] [2021-05-22 02:37:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:37:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:37:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:54,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:37:54,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200754312] [2021-05-22 02:37:54,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200754312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:54,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830108113] [2021-05-22 02:37:54,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:37:54,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-22 02:37:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:37:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:37:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:37:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:37:55,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830108113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:37:55,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:37:55,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-05-22 02:37:55,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945346447] [2021-05-22 02:37:55,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-22 02:37:55,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:37:55,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-22 02:37:55,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:37:55,032 INFO L87 Difference]: Start difference. First operand 426 states and 910 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:00,252 INFO L93 Difference]: Finished difference Result 2725 states and 5348 transitions. [2021-05-22 02:38:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-05-22 02:38:00,252 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-22 02:38:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:00,258 INFO L225 Difference]: With dead ends: 2725 [2021-05-22 02:38:00,258 INFO L226 Difference]: Without dead ends: 2239 [2021-05-22 02:38:00,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17392 ImplicationChecksByTransitivity, 4727.9ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-05-22 02:38:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-05-22 02:38:00,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 269. [2021-05-22 02:38:00,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.044776119402985) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2021-05-22 02:38:00,274 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2021-05-22 02:38:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:00,274 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2021-05-22 02:38:00,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:00,274 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2021-05-22 02:38:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-22 02:38:00,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:00,275 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:00,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:00,497 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash 969410313, now seen corresponding path program 30 times [2021-05-22 02:38:00,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:00,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257714793] [2021-05-22 02:38:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:00,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:00,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257714793] [2021-05-22 02:38:00,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257714793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:00,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005269600] [2021-05-22 02:38:00,657 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 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 [2021-05-22 02:38:00,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-22 02:38:00,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:00,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:38:00,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:01,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005269600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:01,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:01,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-05-22 02:38:01,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236247188] [2021-05-22 02:38:01,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-22 02:38:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-22 02:38:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:38:01,320 INFO L87 Difference]: Start difference. First operand 269 states and 548 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:05,816 INFO L93 Difference]: Finished difference Result 1752 states and 3478 transitions. [2021-05-22 02:38:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-05-22 02:38:05,817 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-22 02:38:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:05,820 INFO L225 Difference]: With dead ends: 1752 [2021-05-22 02:38:05,820 INFO L226 Difference]: Without dead ends: 1748 [2021-05-22 02:38:05,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17239 ImplicationChecksByTransitivity, 4323.1ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-05-22 02:38:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-05-22 02:38:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2021-05-22 02:38:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.057017543859649) internal successors, (469), 228 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2021-05-22 02:38:05,829 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2021-05-22 02:38:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:05,829 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2021-05-22 02:38:05,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2021-05-22 02:38:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-22 02:38:05,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:05,830 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:06,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-22 02:38:06,041 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:06,041 INFO L82 PathProgramCache]: Analyzing trace with hash -441843911, now seen corresponding path program 31 times [2021-05-22 02:38:06,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:06,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497599910] [2021-05-22 02:38:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:06,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:06,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497599910] [2021-05-22 02:38:06,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497599910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:06,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651383865] [2021-05-22 02:38:06,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:38:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:06,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:38:06,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:06,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651383865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:06,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:06,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-22 02:38:06,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399665536] [2021-05-22 02:38:06,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:38:06,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:38:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:38:06,333 INFO L87 Difference]: Start difference. First operand 229 states and 469 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:06,538 INFO L93 Difference]: Finished difference Result 694 states and 1363 transitions. [2021-05-22 02:38:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:38:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-05-22 02:38:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:06,539 INFO L225 Difference]: With dead ends: 694 [2021-05-22 02:38:06,539 INFO L226 Difference]: Without dead ends: 613 [2021-05-22 02:38:06,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:38:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-05-22 02:38:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2021-05-22 02:38:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.1440860215053763) internal successors, (997), 465 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2021-05-22 02:38:06,546 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2021-05-22 02:38:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:06,547 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2021-05-22 02:38:06,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2021-05-22 02:38:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-22 02:38:06,548 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:06,548 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:06,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-22 02:38:06,761 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1019742149, now seen corresponding path program 32 times [2021-05-22 02:38:06,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:06,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376739788] [2021-05-22 02:38:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:07,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:07,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376739788] [2021-05-22 02:38:07,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376739788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:07,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320159387] [2021-05-22 02:38:07,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:38:07,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:38:07,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:07,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:38:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:07,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320159387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:07,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:07,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-05-22 02:38:07,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636208373] [2021-05-22 02:38:07,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-22 02:38:07,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:07,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-22 02:38:07,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:38:07,798 INFO L87 Difference]: Start difference. First operand 466 states and 997 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:14,243 INFO L93 Difference]: Finished difference Result 3146 states and 6182 transitions. [2021-05-22 02:38:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-05-22 02:38:14,244 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-05-22 02:38:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:14,247 INFO L225 Difference]: With dead ends: 3146 [2021-05-22 02:38:14,247 INFO L226 Difference]: Without dead ends: 2576 [2021-05-22 02:38:14,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23637 ImplicationChecksByTransitivity, 5747.1ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-05-22 02:38:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-05-22 02:38:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 291. [2021-05-22 02:38:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2021-05-22 02:38:14,260 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2021-05-22 02:38:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:14,260 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2021-05-22 02:38:14,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2021-05-22 02:38:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-22 02:38:14,261 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:14,261 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:14,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-22 02:38:14,477 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash -820612595, now seen corresponding path program 33 times [2021-05-22 02:38:14,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:14,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579082752] [2021-05-22 02:38:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:14,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:14,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579082752] [2021-05-22 02:38:14,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579082752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:14,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128024372] [2021-05-22 02:38:14,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:38:14,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-22 02:38:14,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:38:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:15,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128024372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:15,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:15,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-05-22 02:38:15,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765224421] [2021-05-22 02:38:15,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-22 02:38:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-22 02:38:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:38:15,283 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 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) [2021-05-22 02:38:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:20,758 INFO L93 Difference]: Finished difference Result 2040 states and 4054 transitions. [2021-05-22 02:38:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-05-22 02:38:20,758 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 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) Word has length 61 [2021-05-22 02:38:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:20,760 INFO L225 Difference]: With dead ends: 2040 [2021-05-22 02:38:20,760 INFO L226 Difference]: Without dead ends: 2036 [2021-05-22 02:38:20,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23384 ImplicationChecksByTransitivity, 5136.1ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-05-22 02:38:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-05-22 02:38:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2021-05-22 02:38:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 246 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2021-05-22 02:38:20,770 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2021-05-22 02:38:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:20,770 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2021-05-22 02:38:20,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 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) [2021-05-22 02:38:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2021-05-22 02:38:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-22 02:38:20,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:20,771 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:20,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-22 02:38:20,976 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:20,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1642473223, now seen corresponding path program 34 times [2021-05-22 02:38:20,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:20,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662711817] [2021-05-22 02:38:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:21,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662711817] [2021-05-22 02:38:21,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662711817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023557122] [2021-05-22 02:38:21,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:21,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:38:21,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:38:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:21,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023557122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:21,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:21,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-22 02:38:21,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823403868] [2021-05-22 02:38:21,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:38:21,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:21,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:38:21,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:38:21,288 INFO L87 Difference]: Start difference. First operand 247 states and 507 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:21,502 INFO L93 Difference]: Finished difference Result 753 states and 1480 transitions. [2021-05-22 02:38:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:38:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-05-22 02:38:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:21,504 INFO L225 Difference]: With dead ends: 753 [2021-05-22 02:38:21,504 INFO L226 Difference]: Without dead ends: 666 [2021-05-22 02:38:21,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:38:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-05-22 02:38:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2021-05-22 02:38:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.1465346534653467) internal successors, (1084), 505 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2021-05-22 02:38:21,510 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2021-05-22 02:38:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:21,510 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2021-05-22 02:38:21,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2021-05-22 02:38:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-22 02:38:21,511 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:21,511 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:21,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-22 02:38:21,733 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1574993669, now seen corresponding path program 35 times [2021-05-22 02:38:21,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:21,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297582025] [2021-05-22 02:38:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:22,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:22,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297582025] [2021-05-22 02:38:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297582025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:22,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091825328] [2021-05-22 02:38:22,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:22,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-22 02:38:22,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:38:22,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:22,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091825328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:22,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:22,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-05-22 02:38:22,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358624450] [2021-05-22 02:38:22,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-22 02:38:22,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-22 02:38:22,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:38:22,883 INFO L87 Difference]: Start difference. First operand 506 states and 1084 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 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) [2021-05-22 02:38:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:30,716 INFO L93 Difference]: Finished difference Result 3595 states and 7072 transitions. [2021-05-22 02:38:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-05-22 02:38:30,717 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 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) Word has length 65 [2021-05-22 02:38:30,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:30,721 INFO L225 Difference]: With dead ends: 3595 [2021-05-22 02:38:30,721 INFO L226 Difference]: Without dead ends: 2935 [2021-05-22 02:38:30,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31446 ImplicationChecksByTransitivity, 6949.6ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-05-22 02:38:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-05-22 02:38:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 313. [2021-05-22 02:38:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.051282051282051) internal successors, (640), 312 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2021-05-22 02:38:30,734 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2021-05-22 02:38:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:30,735 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2021-05-22 02:38:30,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 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) [2021-05-22 02:38:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2021-05-22 02:38:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-22 02:38:30,735 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:30,736 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:30,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-22 02:38:30,938 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1894636305, now seen corresponding path program 36 times [2021-05-22 02:38:30,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:30,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530400225] [2021-05-22 02:38:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:31,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:31,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530400225] [2021-05-22 02:38:31,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530400225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:31,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327436928] [2021-05-22 02:38:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:38:31,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-22 02:38:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:38:31,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:31,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327436928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:31,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:31,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-05-22 02:38:31,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285480171] [2021-05-22 02:38:31,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-22 02:38:31,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-22 02:38:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:38:31,847 INFO L87 Difference]: Start difference. First operand 313 states and 640 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:38,611 INFO L93 Difference]: Finished difference Result 2350 states and 4674 transitions. [2021-05-22 02:38:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-05-22 02:38:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-22 02:38:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:38,614 INFO L225 Difference]: With dead ends: 2350 [2021-05-22 02:38:38,614 INFO L226 Difference]: Without dead ends: 2346 [2021-05-22 02:38:38,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31044 ImplicationChecksByTransitivity, 6328.4ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-05-22 02:38:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-05-22 02:38:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2021-05-22 02:38:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.0643939393939394) internal successors, (545), 264 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2021-05-22 02:38:38,628 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2021-05-22 02:38:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:38,628 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2021-05-22 02:38:38,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2021-05-22 02:38:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-22 02:38:38,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:38,629 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:38,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-22 02:38:38,845 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1631728057, now seen corresponding path program 37 times [2021-05-22 02:38:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:38,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062609743] [2021-05-22 02:38:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:39,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:39,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062609743] [2021-05-22 02:38:39,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062609743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:39,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219322818] [2021-05-22 02:38:39,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-22 02:38:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:39,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219322818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:39,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:39,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-05-22 02:38:39,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005343966] [2021-05-22 02:38:39,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:38:39,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:39,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:38:39,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:38:39,181 INFO L87 Difference]: Start difference. First operand 265 states and 545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:39,483 INFO L93 Difference]: Finished difference Result 812 states and 1597 transitions. [2021-05-22 02:38:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:38:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-05-22 02:38:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:39,485 INFO L225 Difference]: With dead ends: 812 [2021-05-22 02:38:39,485 INFO L226 Difference]: Without dead ends: 719 [2021-05-22 02:38:39,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:38:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-05-22 02:38:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2021-05-22 02:38:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.148623853211009) internal successors, (1171), 545 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2021-05-22 02:38:39,493 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2021-05-22 02:38:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:39,493 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2021-05-22 02:38:39,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2021-05-22 02:38:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-22 02:38:39,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:39,494 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:39,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-22 02:38:39,721 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash 441452731, now seen corresponding path program 38 times [2021-05-22 02:38:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:39,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385280941] [2021-05-22 02:38:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:40,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:40,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385280941] [2021-05-22 02:38:40,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385280941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:40,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390779055] [2021-05-22 02:38:40,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:40,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:38:40,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:40,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:38:40,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:41,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390779055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:41,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:41,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-05-22 02:38:41,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699318542] [2021-05-22 02:38:41,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-22 02:38:41,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-22 02:38:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:38:41,054 INFO L87 Difference]: Start difference. First operand 546 states and 1171 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:50,527 INFO L93 Difference]: Finished difference Result 4072 states and 8018 transitions. [2021-05-22 02:38:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-05-22 02:38:50,528 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-05-22 02:38:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:50,532 INFO L225 Difference]: With dead ends: 4072 [2021-05-22 02:38:50,532 INFO L226 Difference]: Without dead ends: 3316 [2021-05-22 02:38:50,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41063 ImplicationChecksByTransitivity, 8258.5ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-05-22 02:38:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-05-22 02:38:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 335. [2021-05-22 02:38:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.053892215568862) internal successors, (686), 334 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2021-05-22 02:38:50,553 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2021-05-22 02:38:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:50,553 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2021-05-22 02:38:50,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2021-05-22 02:38:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-22 02:38:50,554 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:50,554 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:38:50,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:38:50,777 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:38:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:38:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1349041643, now seen corresponding path program 39 times [2021-05-22 02:38:50,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:38:50,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197546471] [2021-05-22 02:38:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:38:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:38:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:50,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:38:50,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197546471] [2021-05-22 02:38:50,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197546471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:50,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171042873] [2021-05-22 02:38:50,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:38:51,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-22 02:38:51,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:38:51,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:38:51,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:38:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:38:51,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171042873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:38:51,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:38:51,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-05-22 02:38:51,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689443399] [2021-05-22 02:38:51,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-22 02:38:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:38:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-22 02:38:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:38:51,838 INFO L87 Difference]: Start difference. First operand 335 states and 686 transitions. Second operand has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:38:59,804 INFO L93 Difference]: Finished difference Result 2682 states and 5338 transitions. [2021-05-22 02:38:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-05-22 02:38:59,804 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-05-22 02:38:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:38:59,810 INFO L225 Difference]: With dead ends: 2682 [2021-05-22 02:38:59,810 INFO L226 Difference]: Without dead ends: 2678 [2021-05-22 02:38:59,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40450 ImplicationChecksByTransitivity, 7484.6ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-05-22 02:38:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-05-22 02:38:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2021-05-22 02:38:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0673758865248226) internal successors, (583), 282 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2021-05-22 02:38:59,827 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2021-05-22 02:38:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:38:59,827 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2021-05-22 02:38:59,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:38:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2021-05-22 02:38:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-22 02:38:59,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:38:59,828 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:00,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:00,051 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:00,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1888499335, now seen corresponding path program 40 times [2021-05-22 02:39:00,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:00,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904347568] [2021-05-22 02:39:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:00,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:00,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904347568] [2021-05-22 02:39:00,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904347568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:00,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718110484] [2021-05-22 02:39:00,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:00,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:39:00,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:00,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-22 02:39:00,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:00,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718110484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:00,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:00,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-05-22 02:39:00,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329099850] [2021-05-22 02:39:00,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:39:00,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:39:00,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:39:00,431 INFO L87 Difference]: Start difference. First operand 283 states and 583 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:00,713 INFO L93 Difference]: Finished difference Result 871 states and 1714 transitions. [2021-05-22 02:39:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:39:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-05-22 02:39:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:00,714 INFO L225 Difference]: With dead ends: 871 [2021-05-22 02:39:00,714 INFO L226 Difference]: Without dead ends: 772 [2021-05-22 02:39:00,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:39:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-05-22 02:39:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2021-05-22 02:39:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1504273504273503) internal successors, (1258), 585 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2021-05-22 02:39:00,721 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2021-05-22 02:39:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:00,722 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2021-05-22 02:39:00,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2021-05-22 02:39:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-22 02:39:00,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:00,723 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:00,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-22 02:39:00,933 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:00,933 INFO L82 PathProgramCache]: Analyzing trace with hash -808038533, now seen corresponding path program 41 times [2021-05-22 02:39:00,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:00,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11999091] [2021-05-22 02:39:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:01,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11999091] [2021-05-22 02:39:01,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11999091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584258810] [2021-05-22 02:39:01,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:01,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-22 02:39:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:39:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:02,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584258810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:02,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:02,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-05-22 02:39:02,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240961515] [2021-05-22 02:39:02,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-22 02:39:02,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-22 02:39:02,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:39:02,361 INFO L87 Difference]: Start difference. First operand 586 states and 1258 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 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) [2021-05-22 02:39:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:13,866 INFO L93 Difference]: Finished difference Result 4577 states and 9020 transitions. [2021-05-22 02:39:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-05-22 02:39:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 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) Word has length 73 [2021-05-22 02:39:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:13,871 INFO L225 Difference]: With dead ends: 4577 [2021-05-22 02:39:13,871 INFO L226 Difference]: Without dead ends: 3719 [2021-05-22 02:39:13,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52751 ImplicationChecksByTransitivity, 9951.1ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-05-22 02:39:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-05-22 02:39:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 357. [2021-05-22 02:39:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.056179775280899) internal successors, (732), 356 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2021-05-22 02:39:13,896 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2021-05-22 02:39:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:13,896 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2021-05-22 02:39:13,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 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) [2021-05-22 02:39:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2021-05-22 02:39:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-22 02:39:13,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:13,897 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:14,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:14,116 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1893443353, now seen corresponding path program 42 times [2021-05-22 02:39:14,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:14,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341817774] [2021-05-22 02:39:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:14,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341817774] [2021-05-22 02:39:14,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341817774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837011947] [2021-05-22 02:39:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:14,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-05-22 02:39:14,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:39:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:15,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837011947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:15,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:15,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-05-22 02:39:15,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442834266] [2021-05-22 02:39:15,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-22 02:39:15,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:15,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-22 02:39:15,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:39:15,311 INFO L87 Difference]: Start difference. First operand 357 states and 732 transitions. Second operand has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:24,577 INFO L93 Difference]: Finished difference Result 3036 states and 6046 transitions. [2021-05-22 02:39:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-05-22 02:39:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-05-22 02:39:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:24,580 INFO L225 Difference]: With dead ends: 3036 [2021-05-22 02:39:24,580 INFO L226 Difference]: Without dead ends: 3032 [2021-05-22 02:39:24,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51850 ImplicationChecksByTransitivity, 8686.0ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-05-22 02:39:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-05-22 02:39:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2021-05-22 02:39:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.07) internal successors, (621), 300 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2021-05-22 02:39:24,594 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2021-05-22 02:39:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:24,595 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2021-05-22 02:39:24,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2021-05-22 02:39:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-22 02:39:24,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:24,595 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:24,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:24,802 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash -58761159, now seen corresponding path program 43 times [2021-05-22 02:39:24,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:24,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029115775] [2021-05-22 02:39:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:25,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:25,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029115775] [2021-05-22 02:39:25,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029115775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:25,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566556200] [2021-05-22 02:39:25,017 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 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 [2021-05-22 02:39:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-22 02:39:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:25,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566556200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:25,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:25,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-22 02:39:25,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419020272] [2021-05-22 02:39:25,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:39:25,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:25,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:39:25,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:39:25,181 INFO L87 Difference]: Start difference. First operand 301 states and 621 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:25,481 INFO L93 Difference]: Finished difference Result 930 states and 1831 transitions. [2021-05-22 02:39:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:39:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-22 02:39:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:25,482 INFO L225 Difference]: With dead ends: 930 [2021-05-22 02:39:25,482 INFO L226 Difference]: Without dead ends: 825 [2021-05-22 02:39:25,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:39:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-05-22 02:39:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2021-05-22 02:39:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.152) internal successors, (1345), 625 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2021-05-22 02:39:25,491 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2021-05-22 02:39:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:25,491 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2021-05-22 02:39:25,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2021-05-22 02:39:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-22 02:39:25,492 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:25,492 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:25,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-22 02:39:25,709 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash -95480517, now seen corresponding path program 44 times [2021-05-22 02:39:25,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:25,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133075965] [2021-05-22 02:39:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:26,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:26,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133075965] [2021-05-22 02:39:26,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133075965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:26,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044319522] [2021-05-22 02:39:26,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:26,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:39:26,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:26,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:39:26,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:27,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044319522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:27,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:27,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-05-22 02:39:27,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070045843] [2021-05-22 02:39:27,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-22 02:39:27,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:27,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-22 02:39:27,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:39:27,283 INFO L87 Difference]: Start difference. First operand 626 states and 1345 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) 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) [2021-05-22 02:39:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:40,794 INFO L93 Difference]: Finished difference Result 5110 states and 10078 transitions. [2021-05-22 02:39:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-05-22 02:39:40,794 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) 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) Word has length 77 [2021-05-22 02:39:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:40,797 INFO L225 Difference]: With dead ends: 5110 [2021-05-22 02:39:40,797 INFO L226 Difference]: Without dead ends: 4144 [2021-05-22 02:39:40,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66790 ImplicationChecksByTransitivity, 11585.5ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-05-22 02:39:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-05-22 02:39:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 379. [2021-05-22 02:39:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.058201058201058) internal successors, (778), 378 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2021-05-22 02:39:40,842 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2021-05-22 02:39:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:40,842 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2021-05-22 02:39:40,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) 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) [2021-05-22 02:39:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2021-05-22 02:39:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-22 02:39:40,843 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:40,843 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:41,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-22 02:39:41,044 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1341912547, now seen corresponding path program 45 times [2021-05-22 02:39:41,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:41,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636608303] [2021-05-22 02:39:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:41,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:41,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636608303] [2021-05-22 02:39:41,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636608303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:41,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435011339] [2021-05-22 02:39:41,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:41,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-05-22 02:39:41,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:39:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:42,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435011339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:42,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:42,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-05-22 02:39:42,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194346141] [2021-05-22 02:39:42,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-22 02:39:42,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-22 02:39:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:39:42,254 INFO L87 Difference]: Start difference. First operand 379 states and 778 transitions. Second operand has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:53,089 INFO L93 Difference]: Finished difference Result 3412 states and 6798 transitions. [2021-05-22 02:39:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-05-22 02:39:53,089 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-05-22 02:39:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:53,092 INFO L225 Difference]: With dead ends: 3412 [2021-05-22 02:39:53,092 INFO L226 Difference]: Without dead ends: 3408 [2021-05-22 02:39:53,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65508 ImplicationChecksByTransitivity, 10046.0ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-05-22 02:39:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-05-22 02:39:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2021-05-22 02:39:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.0723270440251573) internal successors, (659), 318 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2021-05-22 02:39:53,108 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2021-05-22 02:39:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:53,108 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2021-05-22 02:39:53,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2021-05-22 02:39:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-22 02:39:53,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:53,109 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:53,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-22 02:39:53,320 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:53,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:53,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1809692153, now seen corresponding path program 46 times [2021-05-22 02:39:53,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:53,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125849250] [2021-05-22 02:39:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:53,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:53,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125849250] [2021-05-22 02:39:53,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125849250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:53,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816125691] [2021-05-22 02:39:53,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:53,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:39:53,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:53,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-22 02:39:53,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:53,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816125691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:53,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:53,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-22 02:39:53,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181938978] [2021-05-22 02:39:53,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:39:53,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:53,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:39:53,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:39:53,700 INFO L87 Difference]: Start difference. First operand 319 states and 659 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:39:54,043 INFO L93 Difference]: Finished difference Result 989 states and 1948 transitions. [2021-05-22 02:39:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:39:54,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-05-22 02:39:54,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:39:54,044 INFO L225 Difference]: With dead ends: 989 [2021-05-22 02:39:54,044 INFO L226 Difference]: Without dead ends: 878 [2021-05-22 02:39:54,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:39:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-05-22 02:39:54,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2021-05-22 02:39:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.1533834586466165) internal successors, (1432), 665 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2021-05-22 02:39:54,050 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2021-05-22 02:39:54,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:39:54,050 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2021-05-22 02:39:54,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:39:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2021-05-22 02:39:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-22 02:39:54,051 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:39:54,051 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:39:54,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:54,252 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:39:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:39:54,252 INFO L82 PathProgramCache]: Analyzing trace with hash -521725445, now seen corresponding path program 47 times [2021-05-22 02:39:54,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:39:54,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655682650] [2021-05-22 02:39:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:39:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:39:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:54,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:39:54,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655682650] [2021-05-22 02:39:54,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655682650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:54,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552870702] [2021-05-22 02:39:54,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:39:54,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-22 02:39:54,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:39:54,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-22 02:39:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:39:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:39:56,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552870702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:39:56,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:39:56,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-05-22 02:39:56,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942852684] [2021-05-22 02:39:56,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-22 02:39:56,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:39:56,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-22 02:39:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:39:56,020 INFO L87 Difference]: Start difference. First operand 666 states and 1432 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 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) [2021-05-22 02:40:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:12,209 INFO L93 Difference]: Finished difference Result 5671 states and 11192 transitions. [2021-05-22 02:40:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-05-22 02:40:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 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) Word has length 81 [2021-05-22 02:40:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:12,218 INFO L225 Difference]: With dead ends: 5671 [2021-05-22 02:40:12,218 INFO L226 Difference]: Without dead ends: 4591 [2021-05-22 02:40:12,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83479 ImplicationChecksByTransitivity, 14169.4ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-05-22 02:40:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-05-22 02:40:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 401. [2021-05-22 02:40:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.06) internal successors, (824), 400 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2021-05-22 02:40:12,243 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2021-05-22 02:40:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:12,244 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2021-05-22 02:40:12,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 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) [2021-05-22 02:40:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2021-05-22 02:40:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-22 02:40:12,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:12,245 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:12,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-22 02:40:12,457 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1037658913, now seen corresponding path program 48 times [2021-05-22 02:40:12,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:12,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891863608] [2021-05-22 02:40:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:12,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:12,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891863608] [2021-05-22 02:40:12,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891863608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:12,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405973846] [2021-05-22 02:40:12,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:12,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-05-22 02:40:12,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-22 02:40:12,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:13,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405973846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:13,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:13,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-05-22 02:40:13,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809543923] [2021-05-22 02:40:13,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-22 02:40:13,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-22 02:40:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:40:13,988 INFO L87 Difference]: Start difference. First operand 401 states and 824 transitions. Second operand has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 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) [2021-05-22 02:40:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:26,961 INFO L93 Difference]: Finished difference Result 3810 states and 7594 transitions. [2021-05-22 02:40:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-05-22 02:40:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 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) Word has length 81 [2021-05-22 02:40:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:26,964 INFO L225 Difference]: With dead ends: 3810 [2021-05-22 02:40:26,964 INFO L226 Difference]: Without dead ends: 3806 [2021-05-22 02:40:26,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81705 ImplicationChecksByTransitivity, 12243.8ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-05-22 02:40:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-05-22 02:40:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2021-05-22 02:40:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.074404761904762) internal successors, (697), 336 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2021-05-22 02:40:26,982 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2021-05-22 02:40:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:26,983 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2021-05-22 02:40:26,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 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) [2021-05-22 02:40:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2021-05-22 02:40:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-22 02:40:26,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:26,983 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:27,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:27,184 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:27,184 INFO L82 PathProgramCache]: Analyzing trace with hash 210209465, now seen corresponding path program 49 times [2021-05-22 02:40:27,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:27,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373625991] [2021-05-22 02:40:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:27,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:27,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373625991] [2021-05-22 02:40:27,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373625991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:27,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446409699] [2021-05-22 02:40:27,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:27,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-22 02:40:27,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:27,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446409699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:27,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:27,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-05-22 02:40:27,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662459803] [2021-05-22 02:40:27,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:40:27,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:27,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:40:27,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:40:27,696 INFO L87 Difference]: Start difference. First operand 337 states and 697 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:28,190 INFO L93 Difference]: Finished difference Result 1048 states and 2065 transitions. [2021-05-22 02:40:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:40:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-05-22 02:40:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:28,191 INFO L225 Difference]: With dead ends: 1048 [2021-05-22 02:40:28,191 INFO L226 Difference]: Without dead ends: 931 [2021-05-22 02:40:28,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:40:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-05-22 02:40:28,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2021-05-22 02:40:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.1546099290780143) internal successors, (1519), 705 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2021-05-22 02:40:28,198 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2021-05-22 02:40:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:28,198 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2021-05-22 02:40:28,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2021-05-22 02:40:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-22 02:40:28,199 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:28,199 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:28,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:28,400 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1448811963, now seen corresponding path program 50 times [2021-05-22 02:40:28,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:28,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336713406] [2021-05-22 02:40:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:29,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:29,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336713406] [2021-05-22 02:40:29,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336713406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:29,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281215825] [2021-05-22 02:40:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:40:29,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:40:29,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:29,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:40:29,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:30,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281215825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:30,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:30,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-05-22 02:40:30,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615669295] [2021-05-22 02:40:30,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-22 02:40:30,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:30,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-22 02:40:30,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:40:30,319 INFO L87 Difference]: Start difference. First operand 706 states and 1519 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 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) [2021-05-22 02:40:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:48,725 INFO L93 Difference]: Finished difference Result 6260 states and 12362 transitions. [2021-05-22 02:40:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-05-22 02:40:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 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) Word has length 85 [2021-05-22 02:40:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:48,729 INFO L225 Difference]: With dead ends: 6260 [2021-05-22 02:40:48,729 INFO L226 Difference]: Without dead ends: 5060 [2021-05-22 02:40:48,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103134 ImplicationChecksByTransitivity, 15857.6ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-05-22 02:40:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-05-22 02:40:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 423. [2021-05-22 02:40:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.061611374407583) internal successors, (870), 422 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2021-05-22 02:40:48,756 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2021-05-22 02:40:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:48,756 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2021-05-22 02:40:48,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 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) [2021-05-22 02:40:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2021-05-22 02:40:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-22 02:40:48,757 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:48,758 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:48,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-22 02:40:48,973 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:48,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2136683995, now seen corresponding path program 51 times [2021-05-22 02:40:48,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:48,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119301437] [2021-05-22 02:40:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:49,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:49,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119301437] [2021-05-22 02:40:49,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119301437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:49,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892817698] [2021-05-22 02:40:49,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:49,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-05-22 02:40:49,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:49,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:40:49,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:50,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892817698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:50,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:50,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-05-22 02:40:50,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136868739] [2021-05-22 02:40:50,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-22 02:40:50,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-22 02:40:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:40:50,520 INFO L87 Difference]: Start difference. First operand 423 states and 870 transitions. Second operand has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:41:04,653 INFO L93 Difference]: Finished difference Result 4230 states and 8434 transitions. [2021-05-22 02:41:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-05-22 02:41:04,654 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-22 02:41:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:41:04,656 INFO L225 Difference]: With dead ends: 4230 [2021-05-22 02:41:04,657 INFO L226 Difference]: Without dead ends: 4226 [2021-05-22 02:41:04,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100738 ImplicationChecksByTransitivity, 13479.2ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-05-22 02:41:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-05-22 02:41:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2021-05-22 02:41:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0762711864406778) internal successors, (735), 354 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2021-05-22 02:41:04,677 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2021-05-22 02:41:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:41:04,678 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2021-05-22 02:41:04,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2021-05-22 02:41:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-22 02:41:04,678 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:41:04,678 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:41:04,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:04,879 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:41:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:41:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash -183918983, now seen corresponding path program 52 times [2021-05-22 02:41:04,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:41:04,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297554277] [2021-05-22 02:41:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:41:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:05,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:41:05,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297554277] [2021-05-22 02:41:05,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297554277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:05,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217499344] [2021-05-22 02:41:05,204 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 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 [2021-05-22 02:41:05,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:41:05,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:41:05,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-22 02:41:05,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:41:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:05,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217499344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:05,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:41:05,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-05-22 02:41:05,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328980098] [2021-05-22 02:41:05,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:41:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:41:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:41:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:41:05,391 INFO L87 Difference]: Start difference. First operand 355 states and 735 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:41:05,835 INFO L93 Difference]: Finished difference Result 1107 states and 2182 transitions. [2021-05-22 02:41:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:41:05,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-05-22 02:41:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:41:05,837 INFO L225 Difference]: With dead ends: 1107 [2021-05-22 02:41:05,837 INFO L226 Difference]: Without dead ends: 984 [2021-05-22 02:41:05,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:41:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-05-22 02:41:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-05-22 02:41:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.155704697986577) internal successors, (1606), 745 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2021-05-22 02:41:05,849 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2021-05-22 02:41:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:41:05,849 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2021-05-22 02:41:05,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2021-05-22 02:41:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-22 02:41:05,850 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:41:05,850 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:41:06,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-22 02:41:06,053 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:41:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:41:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash 888660091, now seen corresponding path program 53 times [2021-05-22 02:41:06,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:41:06,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418546885] [2021-05-22 02:41:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:41:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:06,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:41:06,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418546885] [2021-05-22 02:41:06,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418546885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:06,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273331547] [2021-05-22 02:41:06,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:06,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-05-22 02:41:06,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:41:06,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:41:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:41:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:08,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273331547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:08,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:41:08,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-05-22 02:41:08,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409020609] [2021-05-22 02:41:08,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-22 02:41:08,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:41:08,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-22 02:41:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:41:08,113 INFO L87 Difference]: Start difference. First operand 746 states and 1606 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 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) [2021-05-22 02:41:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:41:29,069 INFO L93 Difference]: Finished difference Result 6877 states and 13588 transitions. [2021-05-22 02:41:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-05-22 02:41:29,069 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 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) Word has length 89 [2021-05-22 02:41:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:41:29,074 INFO L225 Difference]: With dead ends: 6877 [2021-05-22 02:41:29,074 INFO L226 Difference]: Without dead ends: 5551 [2021-05-22 02:41:29,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126090 ImplicationChecksByTransitivity, 18013.1ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-05-22 02:41:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-05-22 02:41:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 445. [2021-05-22 02:41:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.063063063063063) internal successors, (916), 444 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2021-05-22 02:41:29,112 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2021-05-22 02:41:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:41:29,112 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2021-05-22 02:41:29,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 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) [2021-05-22 02:41:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2021-05-22 02:41:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-22 02:41:29,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:41:29,113 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:41:29,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-22 02:41:29,329 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:41:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:41:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash 875505449, now seen corresponding path program 54 times [2021-05-22 02:41:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:41:29,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076802316] [2021-05-22 02:41:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:41:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:29,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:41:29,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076802316] [2021-05-22 02:41:29,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076802316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:29,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429109613] [2021-05-22 02:41:29,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:41:29,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-05-22 02:41:29,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:41:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:41:29,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:41:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:30,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429109613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:30,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:41:30,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-05-22 02:41:30,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154929006] [2021-05-22 02:41:30,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-22 02:41:30,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:41:30,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-22 02:41:30,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:41:30,921 INFO L87 Difference]: Start difference. First operand 445 states and 916 transitions. Second operand has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 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) [2021-05-22 02:41:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:41:47,037 INFO L93 Difference]: Finished difference Result 4672 states and 9318 transitions. [2021-05-22 02:41:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-05-22 02:41:47,038 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 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) Word has length 89 [2021-05-22 02:41:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:41:47,041 INFO L225 Difference]: With dead ends: 4672 [2021-05-22 02:41:47,041 INFO L226 Difference]: Without dead ends: 4668 [2021-05-22 02:41:47,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122921 ImplicationChecksByTransitivity, 15192.6ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-05-22 02:41:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-05-22 02:41:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2021-05-22 02:41:47,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.077956989247312) internal successors, (773), 372 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2021-05-22 02:41:47,069 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2021-05-22 02:41:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:41:47,069 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2021-05-22 02:41:47,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 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) [2021-05-22 02:41:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2021-05-22 02:41:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-22 02:41:47,070 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:41:47,070 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:41:47,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:47,292 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:41:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:41:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1618955975, now seen corresponding path program 55 times [2021-05-22 02:41:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:41:47,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104522544] [2021-05-22 02:41:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:41:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:47,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:41:47,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104522544] [2021-05-22 02:41:47,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104522544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:47,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034655107] [2021-05-22 02:41:47,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-22 02:41:47,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:41:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:47,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034655107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:47,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:41:47,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-22 02:41:47,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633684075] [2021-05-22 02:41:47,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:41:47,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:41:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:41:47,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:41:47,857 INFO L87 Difference]: Start difference. First operand 373 states and 773 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:41:48,329 INFO L93 Difference]: Finished difference Result 1166 states and 2299 transitions. [2021-05-22 02:41:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:41:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-05-22 02:41:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:41:48,330 INFO L225 Difference]: With dead ends: 1166 [2021-05-22 02:41:48,330 INFO L226 Difference]: Without dead ends: 1037 [2021-05-22 02:41:48,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:41:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-05-22 02:41:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2021-05-22 02:41:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.156687898089172) internal successors, (1693), 785 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2021-05-22 02:41:48,337 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2021-05-22 02:41:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:41:48,337 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2021-05-22 02:41:48,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:41:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2021-05-22 02:41:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-22 02:41:48,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:41:48,338 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:41:48,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-22 02:41:48,539 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:41:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:41:48,539 INFO L82 PathProgramCache]: Analyzing trace with hash -627432901, now seen corresponding path program 56 times [2021-05-22 02:41:48,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:41:48,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824875376] [2021-05-22 02:41:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:41:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:41:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:49,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:41:49,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824875376] [2021-05-22 02:41:49,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824875376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:49,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995922004] [2021-05-22 02:41:49,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:41:49,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:41:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:41:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:41:49,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:41:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:41:50,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995922004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:41:50,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:41:50,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-05-22 02:41:50,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643088319] [2021-05-22 02:41:50,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-22 02:41:50,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:41:50,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-22 02:41:50,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 02:41:50,707 INFO L87 Difference]: Start difference. First operand 786 states and 1693 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:42:15,492 INFO L93 Difference]: Finished difference Result 7522 states and 14870 transitions. [2021-05-22 02:42:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-05-22 02:42:15,492 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-05-22 02:42:15,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:42:15,497 INFO L225 Difference]: With dead ends: 7522 [2021-05-22 02:42:15,497 INFO L226 Difference]: Without dead ends: 6064 [2021-05-22 02:42:15,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152699 ImplicationChecksByTransitivity, 20492.1ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-05-22 02:42:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-05-22 02:42:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 467. [2021-05-22 02:42:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.0643776824034337) internal successors, (962), 466 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2021-05-22 02:42:15,532 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2021-05-22 02:42:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:42:15,532 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2021-05-22 02:42:15,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2021-05-22 02:42:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-22 02:42:15,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:42:15,533 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:42:15,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:42:15,755 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:42:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:42:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash 700547629, now seen corresponding path program 57 times [2021-05-22 02:42:15,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:42:15,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775344719] [2021-05-22 02:42:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:42:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:42:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:42:16,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:42:16,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775344719] [2021-05-22 02:42:16,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775344719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:16,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438669643] [2021-05-22 02:42:16,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:42:16,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-05-22 02:42:16,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:42:16,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:42:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:42:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:42:17,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438669643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:17,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:42:17,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-05-22 02:42:17,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330228797] [2021-05-22 02:42:17,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-22 02:42:17,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:42:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-22 02:42:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:42:17,434 INFO L87 Difference]: Start difference. First operand 467 states and 962 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 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) [2021-05-22 02:42:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:42:35,836 INFO L93 Difference]: Finished difference Result 5136 states and 10246 transitions. [2021-05-22 02:42:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-05-22 02:42:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 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) Word has length 93 [2021-05-22 02:42:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:42:35,844 INFO L225 Difference]: With dead ends: 5136 [2021-05-22 02:42:35,844 INFO L226 Difference]: Without dead ends: 5132 [2021-05-22 02:42:35,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148584 ImplicationChecksByTransitivity, 17305.3ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-05-22 02:42:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-05-22 02:42:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 391. [2021-05-22 02:42:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0794871794871796) internal successors, (811), 390 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 811 transitions. [2021-05-22 02:42:35,871 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 811 transitions. Word has length 93 [2021-05-22 02:42:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:42:35,871 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 811 transitions. [2021-05-22 02:42:35,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 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) [2021-05-22 02:42:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 811 transitions. [2021-05-22 02:42:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-22 02:42:35,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:42:35,871 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:42:36,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-22 02:42:36,073 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:42:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:42:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1704559353, now seen corresponding path program 58 times [2021-05-22 02:42:36,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:42:36,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920990439] [2021-05-22 02:42:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:42:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:42:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:42:36,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:42:36,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920990439] [2021-05-22 02:42:36,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920990439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:36,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081730614] [2021-05-22 02:42:36,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:42:36,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:42:36,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:42:36,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-22 02:42:36,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:42:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:42:36,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081730614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:36,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:42:36,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-05-22 02:42:36,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660083192] [2021-05-22 02:42:36,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:42:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:42:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:42:36,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:42:36,626 INFO L87 Difference]: Start difference. First operand 391 states and 811 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:42:37,151 INFO L93 Difference]: Finished difference Result 1225 states and 2416 transitions. [2021-05-22 02:42:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:42:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-22 02:42:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:42:37,153 INFO L225 Difference]: With dead ends: 1225 [2021-05-22 02:42:37,153 INFO L226 Difference]: Without dead ends: 1090 [2021-05-22 02:42:37,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:42:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-05-22 02:42:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 826. [2021-05-22 02:42:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1575757575757577) internal successors, (1780), 825 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:37,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1780 transitions. [2021-05-22 02:42:37,162 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1780 transitions. Word has length 95 [2021-05-22 02:42:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:42:37,163 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1780 transitions. [2021-05-22 02:42:37,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:42:37,163 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1780 transitions. [2021-05-22 02:42:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-22 02:42:37,164 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:42:37,164 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:42:37,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:42:37,384 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:42:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:42:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1532058885, now seen corresponding path program 59 times [2021-05-22 02:42:37,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:42:37,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804399243] [2021-05-22 02:42:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:42:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:42:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:42:38,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:42:38,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804399243] [2021-05-22 02:42:38,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804399243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:38,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246082165] [2021-05-22 02:42:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:42:38,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-05-22 02:42:38,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:42:38,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-22 02:42:38,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:42:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:42:39,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246082165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:42:39,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:42:39,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-05-22 02:42:39,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047423141] [2021-05-22 02:42:39,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-22 02:42:39,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:42:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-22 02:42:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:42:39,796 INFO L87 Difference]: Start difference. First operand 826 states and 1780 transitions. Second operand has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:43:08,022 INFO L93 Difference]: Finished difference Result 8195 states and 16208 transitions. [2021-05-22 02:43:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-05-22 02:43:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-05-22 02:43:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:43:08,028 INFO L225 Difference]: With dead ends: 8195 [2021-05-22 02:43:08,028 INFO L226 Difference]: Without dead ends: 6599 [2021-05-22 02:43:08,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183332 ImplicationChecksByTransitivity, 23410.7ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-05-22 02:43:08,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2021-05-22 02:43:08,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 489. [2021-05-22 02:43:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0655737704918034) internal successors, (1008), 488 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1008 transitions. [2021-05-22 02:43:08,061 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1008 transitions. Word has length 97 [2021-05-22 02:43:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:43:08,061 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1008 transitions. [2021-05-22 02:43:08,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1008 transitions. [2021-05-22 02:43:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-22 02:43:08,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:43:08,062 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:43:08,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-22 02:43:08,263 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:43:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:43:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash 136633137, now seen corresponding path program 60 times [2021-05-22 02:43:08,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:43:08,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415224553] [2021-05-22 02:43:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:43:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:43:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:43:08,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:43:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415224553] [2021-05-22 02:43:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415224553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:43:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163612318] [2021-05-22 02:43:08,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:43:08,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-05-22 02:43:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:43:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-22 02:43:08,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:43:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:43:10,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163612318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:43:10,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:43:10,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-05-22 02:43:10,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315571233] [2021-05-22 02:43:10,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-22 02:43:10,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:43:10,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-22 02:43:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:43:10,090 INFO L87 Difference]: Start difference. First operand 489 states and 1008 transitions. Second operand has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:43:31,233 INFO L93 Difference]: Finished difference Result 5622 states and 11218 transitions. [2021-05-22 02:43:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-05-22 02:43:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-05-22 02:43:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:43:31,237 INFO L225 Difference]: With dead ends: 5622 [2021-05-22 02:43:31,237 INFO L226 Difference]: Without dead ends: 5618 [2021-05-22 02:43:31,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178074 ImplicationChecksByTransitivity, 19837.3ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-05-22 02:43:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2021-05-22 02:43:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 409. [2021-05-22 02:43:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0808823529411766) internal successors, (849), 408 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 849 transitions. [2021-05-22 02:43:31,275 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 849 transitions. Word has length 97 [2021-05-22 02:43:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:43:31,275 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 849 transitions. [2021-05-22 02:43:31,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 849 transitions. [2021-05-22 02:43:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-22 02:43:31,276 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:43:31,276 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:43:31,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:43:31,493 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:43:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:43:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash -57617479, now seen corresponding path program 61 times [2021-05-22 02:43:31,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:43:31,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34527352] [2021-05-22 02:43:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:43:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:43:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:43:31,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:43:31,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34527352] [2021-05-22 02:43:31,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34527352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:43:31,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503049891] [2021-05-22 02:43:31,901 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 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 [2021-05-22 02:43:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:43:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-22 02:43:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:43:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:43:32,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503049891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:43:32,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:43:32,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-22 02:43:32,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167039312] [2021-05-22 02:43:32,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:43:32,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:43:32,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:43:32,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:43:32,077 INFO L87 Difference]: Start difference. First operand 409 states and 849 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:43:32,678 INFO L93 Difference]: Finished difference Result 1284 states and 2533 transitions. [2021-05-22 02:43:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:43:32,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-05-22 02:43:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:43:32,679 INFO L225 Difference]: With dead ends: 1284 [2021-05-22 02:43:32,679 INFO L226 Difference]: Without dead ends: 1143 [2021-05-22 02:43:32,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:43:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-05-22 02:43:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 866. [2021-05-22 02:43:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.1583815028901734) internal successors, (1867), 865 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1867 transitions. [2021-05-22 02:43:32,686 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1867 transitions. Word has length 99 [2021-05-22 02:43:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:43:32,686 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 1867 transitions. [2021-05-22 02:43:32,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:43:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1867 transitions. [2021-05-22 02:43:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-22 02:43:32,688 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:43:32,688 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:43:32,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-22 02:43:32,888 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:43:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:43:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1815225019, now seen corresponding path program 62 times [2021-05-22 02:43:32,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:43:32,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723152415] [2021-05-22 02:43:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:43:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:43:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:43:33,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:43:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723152415] [2021-05-22 02:43:33,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723152415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:43:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856500988] [2021-05-22 02:43:33,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:43:33,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:43:33,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:43:33,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:43:33,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:43:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:43:35,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856500988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:43:35,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:43:35,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-05-22 02:43:35,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126025402] [2021-05-22 02:43:35,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-22 02:43:35,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:43:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-22 02:43:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-05-22 02:43:35,426 INFO L87 Difference]: Start difference. First operand 866 states and 1867 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) 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) [2021-05-22 02:44:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:44:07,681 INFO L93 Difference]: Finished difference Result 8896 states and 17602 transitions. [2021-05-22 02:44:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-05-22 02:44:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) 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) Word has length 101 [2021-05-22 02:44:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:44:07,688 INFO L225 Difference]: With dead ends: 8896 [2021-05-22 02:44:07,688 INFO L226 Difference]: Without dead ends: 7156 [2021-05-22 02:44:07,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218377 ImplicationChecksByTransitivity, 26856.7ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-05-22 02:44:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7156 states. [2021-05-22 02:44:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7156 to 511. [2021-05-22 02:44:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.066666666666667) internal successors, (1054), 510 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1054 transitions. [2021-05-22 02:44:07,726 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1054 transitions. Word has length 101 [2021-05-22 02:44:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:44:07,726 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1054 transitions. [2021-05-22 02:44:07,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0851063829787235) 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) [2021-05-22 02:44:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1054 transitions. [2021-05-22 02:44:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-22 02:44:07,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:44:07,727 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:44:07,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:44:07,928 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:44:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:44:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash 195179061, now seen corresponding path program 63 times [2021-05-22 02:44:07,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:44:07,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23360277] [2021-05-22 02:44:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:44:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:44:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:44:08,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:44:08,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23360277] [2021-05-22 02:44:08,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23360277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:44:08,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595731097] [2021-05-22 02:44:08,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:44:08,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-05-22 02:44:08,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:44:08,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:44:08,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:44:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:44:09,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595731097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:44:09,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:44:09,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-05-22 02:44:09,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189244393] [2021-05-22 02:44:09,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-22 02:44:09,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:44:09,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-22 02:44:09,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:44:09,852 INFO L87 Difference]: Start difference. First operand 511 states and 1054 transitions. Second operand has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:33,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:44:33,680 INFO L93 Difference]: Finished difference Result 6130 states and 12234 transitions. [2021-05-22 02:44:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-05-22 02:44:33,681 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-05-22 02:44:33,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:44:33,685 INFO L225 Difference]: With dead ends: 6130 [2021-05-22 02:44:33,685 INFO L226 Difference]: Without dead ends: 6126 [2021-05-22 02:44:33,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211754 ImplicationChecksByTransitivity, 22070.0ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-05-22 02:44:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-05-22 02:44:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 427. [2021-05-22 02:44:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.0821596244131455) internal successors, (887), 426 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 887 transitions. [2021-05-22 02:44:33,718 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 887 transitions. Word has length 101 [2021-05-22 02:44:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:44:33,718 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 887 transitions. [2021-05-22 02:44:33,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 887 transitions. [2021-05-22 02:44:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-22 02:44:33,719 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:44:33,719 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:44:33,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-22 02:44:33,919 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:44:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:44:33,919 INFO L82 PathProgramCache]: Analyzing trace with hash -248290439, now seen corresponding path program 64 times [2021-05-22 02:44:33,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:44:33,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524971971] [2021-05-22 02:44:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:44:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:44:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:44:34,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:44:34,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524971971] [2021-05-22 02:44:34,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524971971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:44:34,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042931737] [2021-05-22 02:44:34,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:44:34,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:44:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:44:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-22 02:44:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:44:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:44:34,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042931737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:44:34,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:44:34,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-22 02:44:34,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815530002] [2021-05-22 02:44:34,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:44:34,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:44:34,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:44:34,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:44:34,477 INFO L87 Difference]: Start difference. First operand 427 states and 887 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:44:35,099 INFO L93 Difference]: Finished difference Result 1343 states and 2650 transitions. [2021-05-22 02:44:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:44:35,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-05-22 02:44:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:44:35,100 INFO L225 Difference]: With dead ends: 1343 [2021-05-22 02:44:35,101 INFO L226 Difference]: Without dead ends: 1196 [2021-05-22 02:44:35,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:44:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-05-22 02:44:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 906. [2021-05-22 02:44:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.1591160220994476) internal successors, (1954), 905 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1954 transitions. [2021-05-22 02:44:35,108 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1954 transitions. Word has length 103 [2021-05-22 02:44:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:44:35,108 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 1954 transitions. [2021-05-22 02:44:35,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:44:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1954 transitions. [2021-05-22 02:44:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-22 02:44:35,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:44:35,109 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:44:35,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-22 02:44:35,309 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:44:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:44:35,310 INFO L82 PathProgramCache]: Analyzing trace with hash 28402043, now seen corresponding path program 65 times [2021-05-22 02:44:35,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:44:35,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810509266] [2021-05-22 02:44:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:44:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:44:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:44:36,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:44:36,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810509266] [2021-05-22 02:44:36,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810509266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:44:36,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699389960] [2021-05-22 02:44:36,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:44:36,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-22 02:44:36,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:44:36,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:44:36,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:44:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:44:37,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699389960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:44:37,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:44:37,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-05-22 02:44:37,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828484833] [2021-05-22 02:44:37,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-22 02:44:37,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:44:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-22 02:44:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-05-22 02:44:38,000 INFO L87 Difference]: Start difference. First operand 906 states and 1954 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 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) [2021-05-22 02:45:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:45:15,453 INFO L93 Difference]: Finished difference Result 9625 states and 19052 transitions. [2021-05-22 02:45:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-05-22 02:45:15,453 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 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) Word has length 105 [2021-05-22 02:45:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:45:15,459 INFO L225 Difference]: With dead ends: 9625 [2021-05-22 02:45:15,459 INFO L226 Difference]: Without dead ends: 7735 [2021-05-22 02:45:15,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258241 ImplicationChecksByTransitivity, 29853.1ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-05-22 02:45:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2021-05-22 02:45:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 533. [2021-05-22 02:45:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.0676691729323307) internal successors, (1100), 532 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:45:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1100 transitions. [2021-05-22 02:45:15,496 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1100 transitions. Word has length 105 [2021-05-22 02:45:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:45:15,496 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1100 transitions. [2021-05-22 02:45:15,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 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) [2021-05-22 02:45:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1100 transitions. [2021-05-22 02:45:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-22 02:45:15,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:45:15,497 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:45:15,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-22 02:45:15,697 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:45:15,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:45:15,698 INFO L82 PathProgramCache]: Analyzing trace with hash -972912839, now seen corresponding path program 66 times [2021-05-22 02:45:15,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:45:15,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804660038] [2021-05-22 02:45:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:45:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:45:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:45:16,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:45:16,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804660038] [2021-05-22 02:45:16,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804660038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:45:16,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11286343] [2021-05-22 02:45:16,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:45:16,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-05-22 02:45:16,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:45:16,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:45:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:45:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:45:17,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11286343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:45:17,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:45:17,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-05-22 02:45:17,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172092220] [2021-05-22 02:45:17,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-22 02:45:17,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:45:17,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-22 02:45:17,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:45:17,722 INFO L87 Difference]: Start difference. First operand 533 states and 1100 transitions. Second operand has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 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) [2021-05-22 02:45:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:45:45,172 INFO L93 Difference]: Finished difference Result 6660 states and 13294 transitions. [2021-05-22 02:45:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-05-22 02:45:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 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) Word has length 105 [2021-05-22 02:45:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:45:45,177 INFO L225 Difference]: With dead ends: 6660 [2021-05-22 02:45:45,177 INFO L226 Difference]: Without dead ends: 6656 [2021-05-22 02:45:45,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250004 ImplicationChecksByTransitivity, 25258.7ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-05-22 02:45:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2021-05-22 02:45:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 445. [2021-05-22 02:45:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.0833333333333335) internal successors, (925), 444 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:45:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 925 transitions. [2021-05-22 02:45:45,215 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 925 transitions. Word has length 105 [2021-05-22 02:45:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:45:45,215 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 925 transitions. [2021-05-22 02:45:45,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 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) [2021-05-22 02:45:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 925 transitions. [2021-05-22 02:45:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-22 02:45:45,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:45:45,216 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:45:45,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:45:45,418 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:45:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:45:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash 601748025, now seen corresponding path program 67 times [2021-05-22 02:45:45,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:45:45,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513502057] [2021-05-22 02:45:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:45:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:45:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:45:45,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:45:45,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513502057] [2021-05-22 02:45:45,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513502057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:45:45,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387195598] [2021-05-22 02:45:45,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:45:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:45:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-22 02:45:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:45:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:45:46,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387195598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:45:46,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:45:46,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-22 02:45:46,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77829539] [2021-05-22 02:45:46,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:45:46,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:45:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:45:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:45:46,014 INFO L87 Difference]: Start difference. First operand 445 states and 925 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:45:46,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:45:46,701 INFO L93 Difference]: Finished difference Result 1402 states and 2767 transitions. [2021-05-22 02:45:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:45:46,702 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-05-22 02:45:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:45:46,703 INFO L225 Difference]: With dead ends: 1402 [2021-05-22 02:45:46,703 INFO L226 Difference]: Without dead ends: 1249 [2021-05-22 02:45:46,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:45:46,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-05-22 02:45:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 946. [2021-05-22 02:45:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.15978835978836) internal successors, (2041), 945 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:45:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2041 transitions. [2021-05-22 02:45:46,711 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2041 transitions. Word has length 107 [2021-05-22 02:45:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:45:46,711 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2041 transitions. [2021-05-22 02:45:46,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:45:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2041 transitions. [2021-05-22 02:45:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-22 02:45:46,712 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:45:46,712 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:45:46,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-22 02:45:46,913 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:45:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:45:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1454825669, now seen corresponding path program 68 times [2021-05-22 02:45:46,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:45:46,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123039366] [2021-05-22 02:45:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:45:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:45:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:45:47,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:45:47,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123039366] [2021-05-22 02:45:47,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123039366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:45:47,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892123609] [2021-05-22 02:45:47,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:45:47,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:45:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:45:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:45:47,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:45:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:45:49,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892123609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:45:49,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:45:49,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-05-22 02:45:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292729881] [2021-05-22 02:45:49,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-22 02:45:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:45:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-22 02:45:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-05-22 02:45:49,801 INFO L87 Difference]: Start difference. First operand 946 states and 2041 transitions. Second operand has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 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) [2021-05-22 02:46:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:46:31,540 INFO L93 Difference]: Finished difference Result 10382 states and 20558 transitions. [2021-05-22 02:46:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-05-22 02:46:31,540 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 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) Word has length 109 [2021-05-22 02:46:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:46:31,546 INFO L225 Difference]: With dead ends: 10382 [2021-05-22 02:46:31,547 INFO L226 Difference]: Without dead ends: 8336 [2021-05-22 02:46:31,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303348 ImplicationChecksByTransitivity, 33385.0ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-05-22 02:46:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-05-22 02:46:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 555. [2021-05-22 02:46:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.068592057761733) internal successors, (1146), 554 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:46:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1146 transitions. [2021-05-22 02:46:31,595 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1146 transitions. Word has length 109 [2021-05-22 02:46:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:46:31,595 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1146 transitions. [2021-05-22 02:46:31,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 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) [2021-05-22 02:46:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1146 transitions. [2021-05-22 02:46:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-22 02:46:31,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:46:31,596 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:46:31,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:46:31,801 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:46:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:46:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash -561063363, now seen corresponding path program 69 times [2021-05-22 02:46:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:46:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348672729] [2021-05-22 02:46:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:46:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:46:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:46:32,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:46:32,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348672729] [2021-05-22 02:46:32,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348672729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:46:32,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692472630] [2021-05-22 02:46:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:46:32,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-05-22 02:46:32,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:46:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:46:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:46:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:46:34,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692472630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:46:34,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:46:34,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-05-22 02:46:34,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723431295] [2021-05-22 02:46:34,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-22 02:46:34,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:46:34,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-22 02:46:34,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:46:34,132 INFO L87 Difference]: Start difference. First operand 555 states and 1146 transitions. Second operand has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 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) [2021-05-22 02:46:55,966 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-05-22 02:47:04,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:47:04,452 INFO L93 Difference]: Finished difference Result 7212 states and 14398 transitions. [2021-05-22 02:47:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-05-22 02:47:04,452 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 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) Word has length 109 [2021-05-22 02:47:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:47:04,457 INFO L225 Difference]: With dead ends: 7212 [2021-05-22 02:47:04,457 INFO L226 Difference]: Without dead ends: 7208 [2021-05-22 02:47:04,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293220 ImplicationChecksByTransitivity, 28081.1ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-05-22 02:47:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2021-05-22 02:47:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 463. [2021-05-22 02:47:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0844155844155843) internal successors, (963), 462 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:47:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 963 transitions. [2021-05-22 02:47:04,498 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 963 transitions. Word has length 109 [2021-05-22 02:47:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:47:04,498 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 963 transitions. [2021-05-22 02:47:04,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 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) [2021-05-22 02:47:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 963 transitions. [2021-05-22 02:47:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-22 02:47:04,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:47:04,499 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:47:04,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-22 02:47:04,699 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:47:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:47:04,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1149059065, now seen corresponding path program 70 times [2021-05-22 02:47:04,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:47:04,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960478943] [2021-05-22 02:47:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:47:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:47:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:47:05,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:47:05,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960478943] [2021-05-22 02:47:05,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960478943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:47:05,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128317657] [2021-05-22 02:47:05,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:47:05,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:47:05,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:47:05,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-22 02:47:05,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:47:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:47:05,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128317657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:47:05,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:47:05,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-05-22 02:47:05,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482760629] [2021-05-22 02:47:05,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-22 02:47:05,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:47:05,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-22 02:47:05,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:47:05,341 INFO L87 Difference]: Start difference. First operand 463 states and 963 transitions. Second operand has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 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) [2021-05-22 02:47:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:47:06,127 INFO L93 Difference]: Finished difference Result 1461 states and 2884 transitions. [2021-05-22 02:47:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:47:06,127 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-05-22 02:47:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:47:06,128 INFO L225 Difference]: With dead ends: 1461 [2021-05-22 02:47:06,128 INFO L226 Difference]: Without dead ends: 1302 [2021-05-22 02:47:06,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:47:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-05-22 02:47:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 986. [2021-05-22 02:47:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 2.1604060913705583) internal successors, (2128), 985 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:47:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2128 transitions. [2021-05-22 02:47:06,136 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2128 transitions. Word has length 111 [2021-05-22 02:47:06,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:47:06,136 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 2128 transitions. [2021-05-22 02:47:06,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 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) [2021-05-22 02:47:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2128 transitions. [2021-05-22 02:47:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-22 02:47:06,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:47:06,137 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:47:06,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:47:06,337 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:47:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:47:06,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1767498757, now seen corresponding path program 71 times [2021-05-22 02:47:06,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:47:06,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468677748] [2021-05-22 02:47:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:47:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:47:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:47:07,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:47:07,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468677748] [2021-05-22 02:47:07,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468677748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:47:07,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036416151] [2021-05-22 02:47:07,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:47:07,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-05-22 02:47:07,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:47:07,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-22 02:47:07,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:47:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:47:09,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036416151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:47:09,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:47:09,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-05-22 02:47:09,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966439541] [2021-05-22 02:47:09,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-22 02:47:09,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:47:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-22 02:47:09,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-05-22 02:47:09,410 INFO L87 Difference]: Start difference. First operand 986 states and 2128 transitions. Second operand has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:47:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:47:56,826 INFO L93 Difference]: Finished difference Result 11167 states and 22120 transitions. [2021-05-22 02:47:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-05-22 02:47:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-05-22 02:47:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:47:56,834 INFO L225 Difference]: With dead ends: 11167 [2021-05-22 02:47:56,834 INFO L226 Difference]: Without dead ends: 8959 [2021-05-22 02:47:56,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354141 ImplicationChecksByTransitivity, 37152.0ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-05-22 02:47:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2021-05-22 02:47:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 577. [2021-05-22 02:47:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.0694444444444446) internal successors, (1192), 576 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:47:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1192 transitions. [2021-05-22 02:47:56,889 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1192 transitions. Word has length 113 [2021-05-22 02:47:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:47:56,889 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1192 transitions. [2021-05-22 02:47:56,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:47:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1192 transitions. [2021-05-22 02:47:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-22 02:47:56,890 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:47:56,890 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:47:57,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:47:57,090 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:47:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:47:57,091 INFO L82 PathProgramCache]: Analyzing trace with hash -770692287, now seen corresponding path program 72 times [2021-05-22 02:47:57,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:47:57,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157330067] [2021-05-22 02:47:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:47:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:47:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:47:57,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:47:57,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157330067] [2021-05-22 02:47:57,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157330067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:47:57,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832759444] [2021-05-22 02:47:57,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:47:57,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-05-22 02:47:57,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:47:57,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-22 02:47:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:47:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:47:59,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832759444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:47:59,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:47:59,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-05-22 02:47:59,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122725750] [2021-05-22 02:47:59,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-22 02:47:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:47:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-22 02:47:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:47:59,485 INFO L87 Difference]: Start difference. First operand 577 states and 1192 transitions. Second operand has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:48:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:48:32,793 INFO L93 Difference]: Finished difference Result 7786 states and 15546 transitions. [2021-05-22 02:48:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-05-22 02:48:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-05-22 02:48:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:48:32,799 INFO L225 Difference]: With dead ends: 7786 [2021-05-22 02:48:32,799 INFO L226 Difference]: Without dead ends: 7782 [2021-05-22 02:48:32,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341815 ImplicationChecksByTransitivity, 30839.7ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-05-22 02:48:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2021-05-22 02:48:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 481. [2021-05-22 02:48:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.0854166666666667) internal successors, (1001), 480 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:48:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1001 transitions. [2021-05-22 02:48:32,839 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1001 transitions. Word has length 113 [2021-05-22 02:48:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:48:32,839 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1001 transitions. [2021-05-22 02:48:32,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:48:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1001 transitions. [2021-05-22 02:48:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-22 02:48:32,840 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:48:32,840 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:48:33,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:48:33,040 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:48:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:48:33,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1317932217, now seen corresponding path program 73 times [2021-05-22 02:48:33,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:48:33,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484913658] [2021-05-22 02:48:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:48:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:48:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:48:33,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:48:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484913658] [2021-05-22 02:48:33,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484913658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:48:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641462684] [2021-05-22 02:48:33,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:48:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:48:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-22 02:48:33,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:48:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:48:33,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641462684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:48:33,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:48:33,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-05-22 02:48:33,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620605254] [2021-05-22 02:48:33,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:48:33,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:48:33,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:48:33,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:48:33,670 INFO L87 Difference]: Start difference. First operand 481 states and 1001 transitions. Second operand has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:48:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:48:34,491 INFO L93 Difference]: Finished difference Result 1520 states and 3001 transitions. [2021-05-22 02:48:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:48:34,492 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-22 02:48:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:48:34,493 INFO L225 Difference]: With dead ends: 1520 [2021-05-22 02:48:34,493 INFO L226 Difference]: Without dead ends: 1355 [2021-05-22 02:48:34,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:48:34,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-05-22 02:48:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1026. [2021-05-22 02:48:34,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 2.1609756097560977) internal successors, (2215), 1025 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:48:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 2215 transitions. [2021-05-22 02:48:34,501 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 2215 transitions. Word has length 115 [2021-05-22 02:48:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:48:34,502 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 2215 transitions. [2021-05-22 02:48:34,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:48:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 2215 transitions. [2021-05-22 02:48:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-22 02:48:34,503 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:48:34,503 INFO L521 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:48:34,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-22 02:48:34,703 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:48:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:48:34,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1761941435, now seen corresponding path program 74 times [2021-05-22 02:48:34,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:48:34,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412184059] [2021-05-22 02:48:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:48:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:48:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:48:35,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:48:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412184059] [2021-05-22 02:48:35,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412184059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:48:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477471135] [2021-05-22 02:48:35,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:48:35,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:48:35,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:48:35,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-22 02:48:35,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:48:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:48:38,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477471135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:48:38,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:48:38,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-05-22 02:48:38,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130330819] [2021-05-22 02:48:38,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-22 02:48:38,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:48:38,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-22 02:48:38,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-05-22 02:48:38,221 INFO L87 Difference]: Start difference. First operand 1026 states and 2215 transitions. Second operand has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 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) Received shutdown request... [2021-05-22 02:49:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 598 states. [2021-05-22 02:49:14,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:14,832 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:49:14,832 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-22 02:49:14,834 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-22 02:49:14,834 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:49:14,834 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:49:14,834 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:49:14,834 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:49:14,834 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:49:14,835 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:49:14,835 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:49:14,835 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:49:14,835 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-22 02:49:14,836 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:49:14,836 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-22 02:49:14,836 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:49:14,837 WARN L196 ceAbstractionStarter]: Timeout [2021-05-22 02:49:14,838 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:49:14 BasicIcfg [2021-05-22 02:49:14,838 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:49:14,838 INFO L168 Benchmark]: Toolchain (without parser) took 731744.10 ms. Allocated memory was 373.3 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 353.2 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 630.0 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:14,838 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 373.3 MB. Free memory was 354.3 MB in the beginning and 354.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:49:14,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.64 ms. Allocated memory is still 373.3 MB. Free memory was 353.1 MB in the beginning and 351.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:49:14,838 INFO L168 Benchmark]: Boogie Preprocessor took 11.28 ms. Allocated memory is still 373.3 MB. Free memory was 351.7 MB in the beginning and 350.8 MB in the end (delta: 933.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:49:14,838 INFO L168 Benchmark]: RCFGBuilder took 318.36 ms. Allocated memory is still 373.3 MB. Free memory was 350.7 MB in the beginning and 338.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:14,838 INFO L168 Benchmark]: TraceAbstraction took 731389.31 ms. Allocated memory was 373.3 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 338.4 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 615.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:14,839 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 0.12 ms. Allocated memory is still 373.3 MB. Free memory was 354.3 MB in the beginning and 354.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.64 ms. Allocated memory is still 373.3 MB. Free memory was 353.1 MB in the beginning and 351.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.28 ms. Allocated memory is still 373.3 MB. Free memory was 351.7 MB in the beginning and 350.8 MB in the end (delta: 933.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 318.36 ms. Allocated memory is still 373.3 MB. Free memory was 350.7 MB in the beginning and 338.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 731389.31 ms. Allocated memory was 373.3 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 338.4 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 615.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1026states) and FLOYD_HOARE automaton (currently 598 states, 110 states before enhancement),while ReachableStatesComputation was computing reachable states (7830 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 731266.6ms, OverallIterations: 77, TraceHistogramMax: 26, EmptinessCheckTime: 77.6ms, AutomataDifference: 640550.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6902 SDtfs, 49187 SDslu, 125126 SDs, 0 SdLazy, 131145 SolverSat, 6260 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61075.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21475 GetRequests, 4228 SyntacticMatches, 50 SemanticMatches, 17197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4297714 ImplicationChecksByTransitivity, 555532.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1026occurred in iteration=76, InterpolantAutomatonStates: 14274, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 871.9ms AutomataMinimizationTime, 76 MinimizatonAttempts, 150437 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 459.7ms SsaConstructionTime, 2252.4ms SatisfiabilityAnalysisTime, 69117.9ms InterpolantComputationTime, 10082 NumberOfCodeBlocks, 10082 NumberOfCodeBlocksAsserted, 704 NumberOfCheckSat, 9930 ConstructedInterpolants, 0 QuantifiedInterpolants, 82282 SizeOfPredicates, 225 NumberOfNonLiveVariables, 12875 ConjunctsInSsa, 2875 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 21499/66401 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown