/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapavg4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:11:51,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:11:51,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:11:51,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:11:51,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:11:51,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:11:51,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:11:51,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:11:51,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:11:51,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:11:51,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:11:51,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:11:51,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:11:51,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:11:51,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:11:51,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:11:51,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:11:51,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:11:51,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:11:51,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:11:51,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:11:51,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:11:51,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:11:51,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:11:51,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:11:51,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:11:51,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:11:51,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:11:51,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:11:51,560 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:11:51,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:11:51,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:11:51,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:11:51,562 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:11:51,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:11:51,562 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:11:51,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:11:51,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:11:51,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:11:51,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:11:51,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:11:51,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:11:51,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:11:51,565 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:11:51,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:11:51,565 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:11:51,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:11:51,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:11:51,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:11:51,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:11:51,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:11:51,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:11:51,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:11:51,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:11:51,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:11:51,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:11:51,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:11:51,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:11:51,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:11:51,847 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:11:51,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:11:51,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:11:51,868 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:11:51,868 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:11:51,869 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg4.i [2019-11-23 20:11:51,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c62fedcc/748afc70ed194852b1e267266b22c29b/FLAG741bbafb4 [2019-11-23 20:11:52,386 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:11:52,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg4.i [2019-11-23 20:11:52,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c62fedcc/748afc70ed194852b1e267266b22c29b/FLAG741bbafb4 [2019-11-23 20:11:52,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c62fedcc/748afc70ed194852b1e267266b22c29b [2019-11-23 20:11:52,797 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:11:52,799 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:11:52,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:52,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:11:52,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:11:52,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66da9fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52, skipping insertion in model container [2019-11-23 20:11:52,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:11:52,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:11:53,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:53,071 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:11:53,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:53,111 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:11:53,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53 WrapperNode [2019-11-23 20:11:53,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:53,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:53,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:11:53,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:11:53,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:53,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:11:53,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:11:53,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:11:53,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (1/1) ... [2019-11-23 20:11:53,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:11:53,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:11:53,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:11:53,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:11:53,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (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 [2019-11-23 20:11:53,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:11:53,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:11:53,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:11:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:11:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:11:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:11:53,658 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:11:53,659 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:11:53,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:53 BoogieIcfgContainer [2019-11-23 20:11:53,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:11:53,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:11:53,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:11:53,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:11:53,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:11:52" (1/3) ... [2019-11-23 20:11:53,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287a65a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:53, skipping insertion in model container [2019-11-23 20:11:53,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:53" (2/3) ... [2019-11-23 20:11:53,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287a65a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:53, skipping insertion in model container [2019-11-23 20:11:53,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:53" (3/3) ... [2019-11-23 20:11:53,669 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg4.i [2019-11-23 20:11:53,678 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:11:53,688 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:11:53,700 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:11:53,723 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:11:53,723 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:11:53,723 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:11:53,723 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:11:53,723 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:11:53,724 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:11:53,724 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:11:53,724 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:11:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:11:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:11:53,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:53,744 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:53,745 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:11:53,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:53,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51132170] [2019-11-23 20:11:53,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:11:53,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51132170] [2019-11-23 20:11:53,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:53,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:53,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641774092] [2019-11-23 20:11:53,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:53,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:53,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:53,955 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:11:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:54,007 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:11:54,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:54,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:11:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:54,024 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:11:54,024 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:11:54,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:11:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:11:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:11:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:11:54,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:11:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:54,064 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:11:54,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:11:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:11:54,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:54,066 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:54,066 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:11:54,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:54,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998217415] [2019-11-23 20:11:54,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:11:54,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998217415] [2019-11-23 20:11:54,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:54,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:54,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650381496] [2019-11-23 20:11:54,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:54,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:54,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:54,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:54,139 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:11:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:54,191 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:11:54,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:54,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:11:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:54,193 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:11:54,193 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:11:54,194 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:11:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:11:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:11:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:11:54,201 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:11:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:54,201 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:11:54,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:11:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:11:54,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:54,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:54,203 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:54,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:11:54,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:54,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661403] [2019-11-23 20:11:54,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:54,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661403] [2019-11-23 20:11:54,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:54,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:54,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222125399] [2019-11-23 20:11:54,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:54,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:54,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:54,298 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:11:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:54,321 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:11:54,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:54,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:11:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:54,323 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:11:54,324 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:11:54,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:11:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:11:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:11:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:11:54,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:11:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:54,338 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:11:54,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:11:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:11:54,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:54,341 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:54,341 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:54,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:11:54,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:54,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442862458] [2019-11-23 20:11:54,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:54,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442862458] [2019-11-23 20:11:54,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121370317] [2019-11-23 20:11:54,467 INFO L94 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 [2019-11-23 20:11:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:54,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:54,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:54,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:11:54,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220945056] [2019-11-23 20:11:54,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:11:54,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:54,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:11:54,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:11:54,585 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:11:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:54,620 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:11:54,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:11:54,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:11:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:54,622 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:11:54,622 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:11:54,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:11:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:11:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:11:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:11:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:11:54,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:11:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:54,633 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:11:54,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:11:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:11:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:11:54,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:54,635 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:54,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:54,841 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:11:54,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:54,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193653463] [2019-11-23 20:11:54,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:54,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193653463] [2019-11-23 20:11:54,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036306644] [2019-11-23 20:11:54,970 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:55,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:55,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:55,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:55,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:55,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:55,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:11:55,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839565304] [2019-11-23 20:11:55,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:11:55,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:55,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:11:55,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:55,074 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:11:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:55,146 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:11:55,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:11:55,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:11:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:55,152 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:11:55,152 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:11:55,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:11:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:11:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:11:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:11:55,165 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:11:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:55,165 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:11:55,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:11:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:11:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:11:55,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,167 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:55,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:55,368 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:11:55,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:55,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818836015] [2019-11-23 20:11:55,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:55,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818836015] [2019-11-23 20:11:55,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212876587] [2019-11-23 20:11:55,438 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:55,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:11:55,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:55,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:55,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:11:55,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:55,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:11:55,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523973807] [2019-11-23 20:11:55,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:11:55,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:55,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:11:55,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:55,534 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:11:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:55,638 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:11:55,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:11:55,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:11:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:55,639 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:11:55,640 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:11:55,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:11:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:11:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:11:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:11:55,647 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:11:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:55,647 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:11:55,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:11:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:11:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:11:55,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,648 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:55,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:55,859 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:55,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:11:55,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:55,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594649216] [2019-11-23 20:11:55,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:11:55,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594649216] [2019-11-23 20:11:55,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371420254] [2019-11-23 20:11:55,983 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,046 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:56,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:56,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:56,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:11:56,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:56,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:11:56,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106641839] [2019-11-23 20:11:56,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:11:56,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:11:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:56,085 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:11:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,205 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:11:56,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:56,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:11:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,207 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:11:56,207 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:11:56,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:11:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:11:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:11:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:11:56,215 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:11:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:56,216 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:11:56,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:11:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:11:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:11:56,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,218 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,422 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,423 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:11:56,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388637250] [2019-11-23 20:11:56,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:11:56,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388637250] [2019-11-23 20:11:56,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618515138] [2019-11-23 20:11:56,522 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:11:56,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:56,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:11:56,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:11:56,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:56,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:11:56,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172509682] [2019-11-23 20:11:56,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:56,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:56,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:56,672 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:11:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,776 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:11:56,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:56,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:11:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,781 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:11:56,781 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:11:56,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:11:56,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:11:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:11:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:11:56,793 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:11:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:56,794 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:11:56,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:11:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:11:56,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,798 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,999 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,999 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:11:56,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760184624] [2019-11-23 20:11:57,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:11:57,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760184624] [2019-11-23 20:11:57,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835618117] [2019-11-23 20:11:57,123 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,195 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:11:57,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:57,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:11:57,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:11:57,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713357676] [2019-11-23 20:11:57,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:57,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:57,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:57,245 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:11:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,312 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:11:57,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:57,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:11:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,313 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:11:57,314 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:11:57,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:11:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:11:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:11:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:11:57,328 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:11:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,328 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:11:57,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:11:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:11:57,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,331 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:57,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,541 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:11:57,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804149905] [2019-11-23 20:11:57,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:57,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804149905] [2019-11-23 20:11:57,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151794023] [2019-11-23 20:11:57,645 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:57,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:11:57,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599635047] [2019-11-23 20:11:57,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:11:57,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:11:57,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:11:57,760 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:11:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,803 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:11:57,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:57,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:11:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,804 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:11:57,804 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:11:57,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:11:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:11:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:11:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:11:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:11:57,819 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:11:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,820 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:11:57,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:11:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:11:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:11:57,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,824 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:58,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,028 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:11:58,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789354786] [2019-11-23 20:11:58,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:58,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789354786] [2019-11-23 20:11:58,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218060474] [2019-11-23 20:11:58,182 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:58,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:58,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:11:58,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:58,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:58,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:11:58,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821981379] [2019-11-23 20:11:58,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:58,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:58,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:58,270 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:11:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:58,329 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:11:58,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:11:58,330 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:11:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:58,330 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:11:58,330 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:11:58,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:11:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:11:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:11:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:11:58,338 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:11:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:58,338 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:11:58,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:11:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:11:58,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:58,340 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:58,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,553 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:11:58,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285102497] [2019-11-23 20:11:58,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:58,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285102497] [2019-11-23 20:11:58,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288938579] [2019-11-23 20:11:58,655 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:11:58,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:58,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:11:58,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:11:58,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:58,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:11:58,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602749311] [2019-11-23 20:11:58,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:11:58,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:58,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:11:58,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:11:58,801 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:11:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:58,885 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:11:58,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:11:58,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:11:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:58,887 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:11:58,889 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:11:58,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:11:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:11:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:11:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:11:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:11:58,906 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:11:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:58,906 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:11:58,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:11:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:11:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:11:58,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:58,907 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:59,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,114 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:11:59,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:59,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771999234] [2019-11-23 20:11:59,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:59,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771999234] [2019-11-23 20:11:59,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197056587] [2019-11-23 20:11:59,256 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,321 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:59,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:59,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:11:59,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:59,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:59,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:11:59,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183341843] [2019-11-23 20:11:59,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:11:59,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:11:59,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:11:59,352 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:11:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:59,394 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:11:59,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:11:59,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:11:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:59,395 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:11:59,395 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:11:59,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:11:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:11:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:11:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:11:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:11:59,406 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:11:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:59,407 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:11:59,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:11:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:11:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:11:59,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:59,409 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:59,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,613 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:11:59,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:59,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336085871] [2019-11-23 20:11:59,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:59,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336085871] [2019-11-23 20:11:59,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504249286] [2019-11-23 20:11:59,777 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,119 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:12:00,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:00,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:12:00,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:12:00,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:00,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:12:00,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744624863] [2019-11-23 20:12:00,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:12:00,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:00,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:12:00,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:12:00,254 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:12:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:00,382 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 20:12:00,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:12:00,382 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:12:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:00,383 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:12:00,383 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:12:00,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:12:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:12:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 20:12:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:12:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:12:00,394 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 20:12:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:00,398 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:12:00,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:12:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:12:00,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:12:00,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:00,399 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:00,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,600 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 20:12:00,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:00,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977451110] [2019-11-23 20:12:00,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:12:00,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977451110] [2019-11-23 20:12:00,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478042021] [2019-11-23 20:12:00,776 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,143 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:12:01,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:01,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:12:01,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 20:12:01,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:01,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:12:01,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727910396] [2019-11-23 20:12:01,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:12:01,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:12:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:12:01,216 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:12:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:01,294 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 20:12:01,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:12:01,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 20:12:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:01,295 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:12:01,295 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:12:01,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:12:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:12:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:12:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:12:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:12:01,301 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 20:12:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:01,301 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:12:01,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:12:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:12:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:12:01,302 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:01,302 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:01,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,509 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:12:01,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:01,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907218908] [2019-11-23 20:12:01,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:01,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907218908] [2019-11-23 20:12:01,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879740842] [2019-11-23 20:12:01,660 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:12:01,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:01,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:01,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:12:01,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064817291] [2019-11-23 20:12:01,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:12:01,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:01,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:12:01,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:12:01,743 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:12:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:01,803 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:12:01,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:12:01,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:12:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:01,804 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:12:01,804 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:12:01,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:12:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:12:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:12:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:12:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:12:01,809 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:12:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:01,810 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:12:01,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:12:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:12:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:12:01,811 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:01,811 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:02,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:02,014 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:12:02,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:02,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004158340] [2019-11-23 20:12:02,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:02,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004158340] [2019-11-23 20:12:02,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262043211] [2019-11-23 20:12:02,204 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:02,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:02,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:02,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:12:02,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:02,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:02,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:12:02,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881874947] [2019-11-23 20:12:02,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:12:02,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:02,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:12:02,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:12:02,295 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:12:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:02,352 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:12:02,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:12:02,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:12:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:02,353 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:12:02,353 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:12:02,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:12:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:12:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:12:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:12:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:12:02,358 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:12:02,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:02,358 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:12:02,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:12:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:12:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:12:02,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:02,360 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:02,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:02,563 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:02,564 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:12:02,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:02,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790966292] [2019-11-23 20:12:02,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:02,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790966292] [2019-11-23 20:12:02,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416627555] [2019-11-23 20:12:02,745 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:02,853 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:12:02,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:02,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:02,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:12:02,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:02,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:12:02,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898820795] [2019-11-23 20:12:02,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:02,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:02,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:02,944 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:12:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:03,059 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:12:03,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:12:03,060 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:12:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:03,060 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:12:03,060 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:12:03,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:12:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:12:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:12:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:12:03,065 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:12:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:03,066 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:12:03,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:12:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:12:03,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:03,067 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:03,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:03,270 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:03,271 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:12:03,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:03,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360555143] [2019-11-23 20:12:03,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:12:03,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360555143] [2019-11-23 20:12:03,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17559322] [2019-11-23 20:12:03,650 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:03,713 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:03,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:03,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:03,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:12:03,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:03,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:12:03,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975451343] [2019-11-23 20:12:03,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:12:03,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:03,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:12:03,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:03,800 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:12:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:04,026 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:12:04,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:12:04,026 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:12:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:04,027 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:12:04,027 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:12:04,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:12:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:12:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:12:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:12:04,034 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:12:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:04,034 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:12:04,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:12:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:12:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:12:04,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:04,036 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:04,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:04,246 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:12:04,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:04,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468826049] [2019-11-23 20:12:04,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:12:04,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468826049] [2019-11-23 20:12:04,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316893292] [2019-11-23 20:12:04,467 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:05,276 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:12:05,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:05,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:12:05,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 20:12:05,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:05,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:12:05,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030565787] [2019-11-23 20:12:05,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:12:05,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:05,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:12:05,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:05,395 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:12:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:05,596 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:12:05,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:12:05,596 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:12:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:05,597 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:12:05,597 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:12:05,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:12:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:12:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:12:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:12:05,605 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:12:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:05,605 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:12:05,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:12:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:12:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:12:05,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:05,606 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:05,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:05,807 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:05,807 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:12:05,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:05,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815556707] [2019-11-23 20:12:05,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:06,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815556707] [2019-11-23 20:12:06,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175784146] [2019-11-23 20:12:06,028 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:06,658 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:12:06,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:06,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:12:06,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:12:06,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:06,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:12:06,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920712532] [2019-11-23 20:12:06,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:12:06,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:06,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:12:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:06,802 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:12:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:06,902 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:12:06,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:12:06,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:12:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:06,904 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:12:06,904 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:12:06,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:12:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:12:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:12:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:12:06,919 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:12:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:06,919 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:12:06,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:12:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:12:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:12:06,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:06,920 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:07,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,123 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:07,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:12:07,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:07,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874413816] [2019-11-23 20:12:07,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:07,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874413816] [2019-11-23 20:12:07,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588554632] [2019-11-23 20:12:07,409 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:07,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:12:07,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:07,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:07,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:12:07,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269173985] [2019-11-23 20:12:07,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:12:07,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:12:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:12:07,516 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:12:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:07,579 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:12:07,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:12:07,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:12:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:07,583 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:12:07,583 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:12:07,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:12:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:12:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:12:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:12:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:12:07,588 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:12:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:07,588 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:12:07,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:12:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:12:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:12:07,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:07,590 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:07,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,799 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:07,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:12:07,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:07,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360966336] [2019-11-23 20:12:07,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:08,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360966336] [2019-11-23 20:12:08,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408327131] [2019-11-23 20:12:08,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:08,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:08,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:08,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:12:08,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:08,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:08,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:12:08,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206937742] [2019-11-23 20:12:08,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:08,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:08,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:08,320 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:12:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:08,400 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:12:08,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:12:08,401 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:12:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:08,402 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:12:08,402 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:12:08,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:12:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:12:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:12:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:12:08,409 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:12:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:08,409 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:12:08,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:12:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:12:08,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:08,410 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:08,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:08,614 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:08,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:12:08,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:08,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572182888] [2019-11-23 20:12:08,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:08,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572182888] [2019-11-23 20:12:08,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125808405] [2019-11-23 20:12:08,904 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:09,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:12:09,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:09,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:12:09,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 20:12:09,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:09,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2019-11-23 20:12:09,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922582827] [2019-11-23 20:12:09,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:12:09,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:09,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:12:09,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:12:09,290 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 34 states. [2019-11-23 20:12:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:09,702 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2019-11-23 20:12:09,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:12:09,702 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 115 [2019-11-23 20:12:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:09,703 INFO L225 Difference]: With dead ends: 200 [2019-11-23 20:12:09,703 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 20:12:09,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1265, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:12:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 20:12:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-11-23 20:12:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:12:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:12:09,709 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 115 [2019-11-23 20:12:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:09,709 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:12:09,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:12:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:12:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:12:09,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:09,710 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:09,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:09,915 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 22 times [2019-11-23 20:12:09,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:09,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484473104] [2019-11-23 20:12:09,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:10,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484473104] [2019-11-23 20:12:10,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576666132] [2019-11-23 20:12:10,282 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:10,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:10,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:10,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:12:10,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:10,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:10,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:12:10,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088405259] [2019-11-23 20:12:10,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:12:10,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:10,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:12:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:10,476 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 27 states. [2019-11-23 20:12:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:10,590 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2019-11-23 20:12:10,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:12:10,592 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2019-11-23 20:12:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:10,593 INFO L225 Difference]: With dead ends: 206 [2019-11-23 20:12:10,593 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 20:12:10,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 20:12:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-11-23 20:12:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 20:12:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-11-23 20:12:10,599 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2019-11-23 20:12:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:10,600 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-11-23 20:12:10,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:12:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-11-23 20:12:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 20:12:10,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:10,601 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:10,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:10,805 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 23 times [2019-11-23 20:12:10,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:10,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922601047] [2019-11-23 20:12:10,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:11,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922601047] [2019-11-23 20:12:11,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688789649] [2019-11-23 20:12:11,286 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:14,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 20:12:14,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:14,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:12:14,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:14,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:14,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:12:14,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127354419] [2019-11-23 20:12:14,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:12:14,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:14,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:12:14,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:14,432 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2019-11-23 20:12:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:14,525 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2019-11-23 20:12:14,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:12:14,526 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2019-11-23 20:12:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:14,526 INFO L225 Difference]: With dead ends: 208 [2019-11-23 20:12:14,527 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:12:14,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:14,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:12:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-11-23 20:12:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 20:12:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2019-11-23 20:12:14,532 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2019-11-23 20:12:14,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:14,532 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2019-11-23 20:12:14,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:12:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2019-11-23 20:12:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 20:12:14,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:14,533 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:14,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:14,740 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 24 times [2019-11-23 20:12:14,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:14,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197467595] [2019-11-23 20:12:14,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:15,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197467595] [2019-11-23 20:12:15,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923948528] [2019-11-23 20:12:15,161 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:16,670 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:12:16,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:16,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:12:16,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2019-11-23 20:12:16,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:16,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-23 20:12:16,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052022629] [2019-11-23 20:12:16,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:12:16,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:16,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:12:16,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:16,901 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 36 states. [2019-11-23 20:12:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:17,078 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2019-11-23 20:12:17,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:12:17,078 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 129 [2019-11-23 20:12:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:17,079 INFO L225 Difference]: With dead ends: 213 [2019-11-23 20:12:17,079 INFO L226 Difference]: Without dead ends: 136 [2019-11-23 20:12:17,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-23 20:12:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2019-11-23 20:12:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:12:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:12:17,084 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 129 [2019-11-23 20:12:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:17,085 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:12:17,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:12:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:12:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:12:17,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:17,086 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:17,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:17,291 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2138537200, now seen corresponding path program 25 times [2019-11-23 20:12:17,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:17,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969771560] [2019-11-23 20:12:17,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:17,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969771560] [2019-11-23 20:12:17,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915347747] [2019-11-23 20:12:17,839 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:17,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:12:17,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:17,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:17,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:12:17,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546946340] [2019-11-23 20:12:17,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:12:17,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:17,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:12:17,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:12:17,967 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 30 states. [2019-11-23 20:12:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:18,073 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-11-23 20:12:18,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:12:18,073 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2019-11-23 20:12:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:18,074 INFO L225 Difference]: With dead ends: 216 [2019-11-23 20:12:18,074 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:12:18,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:12:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:12:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-11-23 20:12:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:12:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 20:12:18,079 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2019-11-23 20:12:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:18,080 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 20:12:18,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:12:18,080 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 20:12:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:12:18,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:18,081 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:18,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:18,282 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:18,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 26 times [2019-11-23 20:12:18,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:18,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705055230] [2019-11-23 20:12:18,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:18,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705055230] [2019-11-23 20:12:18,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26855638] [2019-11-23 20:12:18,739 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:18,833 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:18,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:18,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:12:18,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:18,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:18,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:12:18,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804195250] [2019-11-23 20:12:18,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:12:18,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:18,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:12:18,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:12:18,867 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2019-11-23 20:12:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:18,960 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2019-11-23 20:12:18,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:12:18,962 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2019-11-23 20:12:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:18,963 INFO L225 Difference]: With dead ends: 218 [2019-11-23 20:12:18,963 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:12:18,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:12:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:12:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 20:12:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:12:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:12:18,969 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2019-11-23 20:12:18,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:18,969 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:12:18,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:12:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:12:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:12:18,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:18,970 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:19,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:19,174 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:19,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 27 times [2019-11-23 20:12:19,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:19,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184585085] [2019-11-23 20:12:19,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:19,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184585085] [2019-11-23 20:12:19,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52810138] [2019-11-23 20:12:19,647 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:19,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:12:19,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:19,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:12:19,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 55 proven. 64 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2019-11-23 20:12:20,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:20,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 14] total 43 [2019-11-23 20:12:20,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998584766] [2019-11-23 20:12:20,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:12:20,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:12:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=1269, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:20,265 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 43 states. [2019-11-23 20:12:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:22,044 INFO L93 Difference]: Finished difference Result 230 states and 242 transitions. [2019-11-23 20:12:22,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:12:22,045 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 137 [2019-11-23 20:12:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:22,046 INFO L225 Difference]: With dead ends: 230 [2019-11-23 20:12:22,046 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 20:12:22,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1640, Invalid=4840, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 20:12:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 20:12:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2019-11-23 20:12:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:12:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:12:22,056 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 137 [2019-11-23 20:12:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:22,057 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:12:22,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:12:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:12:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:12:22,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:22,058 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:22,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:22,259 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:22,259 INFO L82 PathProgramCache]: Analyzing trace with hash 922342406, now seen corresponding path program 28 times [2019-11-23 20:12:22,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:22,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483578400] [2019-11-23 20:12:22,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:22,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483578400] [2019-11-23 20:12:22,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618457903] [2019-11-23 20:12:22,704 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:22,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:22,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:22,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:12:22,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:22,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:22,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 20:12:22,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584215385] [2019-11-23 20:12:22,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:12:22,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:12:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:12:22,854 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 34 states. [2019-11-23 20:12:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:22,961 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2019-11-23 20:12:22,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:12:22,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 147 [2019-11-23 20:12:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:22,963 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:12:22,963 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 20:12:22,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:12:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 20:12:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2019-11-23 20:12:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 20:12:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2019-11-23 20:12:22,969 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2019-11-23 20:12:22,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:22,969 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2019-11-23 20:12:22,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:12:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2019-11-23 20:12:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 20:12:22,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:22,970 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:23,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:23,176 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1220684740, now seen corresponding path program 29 times [2019-11-23 20:12:23,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:23,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794517910] [2019-11-23 20:12:23,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:23,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794517910] [2019-11-23 20:12:23,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36930674] [2019-11-23 20:12:23,896 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:25,884 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2019-11-23 20:12:25,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:25,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:25,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1187 trivial. 0 not checked. [2019-11-23 20:12:26,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:26,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12] total 44 [2019-11-23 20:12:26,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685882679] [2019-11-23 20:12:26,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:12:26,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:26,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:12:26,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:12:26,090 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 44 states. [2019-11-23 20:12:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:26,473 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2019-11-23 20:12:26,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:12:26,474 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 149 [2019-11-23 20:12:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:26,476 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:12:26,476 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:12:26,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:12:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:12:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2019-11-23 20:12:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 20:12:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2019-11-23 20:12:26,491 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 149 [2019-11-23 20:12:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:26,492 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2019-11-23 20:12:26,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:12:26,492 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2019-11-23 20:12:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 20:12:26,493 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:26,494 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:26,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:26,703 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:26,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:26,703 INFO L82 PathProgramCache]: Analyzing trace with hash -533793408, now seen corresponding path program 30 times [2019-11-23 20:12:26,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:26,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598726721] [2019-11-23 20:12:26,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-23 20:12:27,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598726721] [2019-11-23 20:12:27,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401375346] [2019-11-23 20:12:27,389 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:29,683 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:12:29,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:29,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:12:29,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2019-11-23 20:12:29,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:29,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11] total 44 [2019-11-23 20:12:29,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131133895] [2019-11-23 20:12:29,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:12:29,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:12:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:12:29,904 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 44 states. [2019-11-23 20:12:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:30,112 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2019-11-23 20:12:30,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:12:30,115 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 157 [2019-11-23 20:12:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:30,116 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:12:30,116 INFO L226 Difference]: Without dead ends: 164 [2019-11-23 20:12:30,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:12:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-23 20:12:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2019-11-23 20:12:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:12:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:12:30,128 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 157 [2019-11-23 20:12:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:30,128 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:12:30,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:12:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:12:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:12:30,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:30,129 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:30,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:30,335 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 31 times [2019-11-23 20:12:30,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:30,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191665068] [2019-11-23 20:12:30,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:30,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191665068] [2019-11-23 20:12:30,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930408784] [2019-11-23 20:12:30,869 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:30,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:12:30,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:31,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:31,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:12:31,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353549397] [2019-11-23 20:12:31,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:12:31,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:12:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:12:31,016 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 37 states. [2019-11-23 20:12:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:31,134 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:12:31,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:12:31,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2019-11-23 20:12:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:31,136 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:12:31,136 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:12:31,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:12:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:12:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:12:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:12:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:12:31,143 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:12:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:31,143 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:12:31,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:12:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:12:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:12:31,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:31,144 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:31,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:31,348 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:31,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1569164806, now seen corresponding path program 32 times [2019-11-23 20:12:31,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:31,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517461126] [2019-11-23 20:12:31,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:32,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517461126] [2019-11-23 20:12:32,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909076255] [2019-11-23 20:12:32,090 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:32,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:32,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:32,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:12:32,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:32,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:32,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:12:32,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747614282] [2019-11-23 20:12:32,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:12:32,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:12:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:12:32,228 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 38 states. [2019-11-23 20:12:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:32,346 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-11-23 20:12:32,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:12:32,347 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 163 [2019-11-23 20:12:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:32,348 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:12:32,348 INFO L226 Difference]: Without dead ends: 167 [2019-11-23 20:12:32,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:12:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-23 20:12:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2019-11-23 20:12:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-23 20:12:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2019-11-23 20:12:32,355 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 163 [2019-11-23 20:12:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:32,355 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2019-11-23 20:12:32,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:12:32,356 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2019-11-23 20:12:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-23 20:12:32,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:32,357 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:32,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:32,561 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1127903816, now seen corresponding path program 33 times [2019-11-23 20:12:32,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:32,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970817990] [2019-11-23 20:12:32,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:33,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970817990] [2019-11-23 20:12:33,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714165548] [2019-11-23 20:12:33,281 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:33,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:12:33,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:33,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:33,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-11-23 20:12:33,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:33,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2019-11-23 20:12:33,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288544165] [2019-11-23 20:12:33,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:12:33,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:33,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:12:33,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:12:33,661 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 48 states. [2019-11-23 20:12:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:33,873 INFO L93 Difference]: Finished difference Result 265 states and 274 transitions. [2019-11-23 20:12:33,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:12:33,873 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 165 [2019-11-23 20:12:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:33,874 INFO L225 Difference]: With dead ends: 265 [2019-11-23 20:12:33,874 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:12:33,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:12:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:12:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2019-11-23 20:12:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-23 20:12:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2019-11-23 20:12:33,880 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 165 [2019-11-23 20:12:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:33,880 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2019-11-23 20:12:33,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:12:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2019-11-23 20:12:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 20:12:33,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:33,881 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:34,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:34,084 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1634907404, now seen corresponding path program 34 times [2019-11-23 20:12:34,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:34,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744723201] [2019-11-23 20:12:34,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:34,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744723201] [2019-11-23 20:12:34,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812177315] [2019-11-23 20:12:34,799 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:34,899 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:34,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:34,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:12:34,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2019-11-23 20:12:35,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:35,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2019-11-23 20:12:35,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770218185] [2019-11-23 20:12:35,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:12:35,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:12:35,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:12:35,134 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 50 states. [2019-11-23 20:12:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:35,414 INFO L93 Difference]: Finished difference Result 277 states and 288 transitions. [2019-11-23 20:12:35,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:12:35,415 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 169 [2019-11-23 20:12:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:35,416 INFO L225 Difference]: With dead ends: 277 [2019-11-23 20:12:35,416 INFO L226 Difference]: Without dead ends: 182 [2019-11-23 20:12:35,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:12:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-23 20:12:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2019-11-23 20:12:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 20:12:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2019-11-23 20:12:35,424 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2019-11-23 20:12:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:35,424 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2019-11-23 20:12:35,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:12:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2019-11-23 20:12:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-23 20:12:35,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:35,425 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:35,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:35,629 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1798241360, now seen corresponding path program 35 times [2019-11-23 20:12:35,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:35,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255815897] [2019-11-23 20:12:35,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:12:36,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255815897] [2019-11-23 20:12:36,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968956] [2019-11-23 20:12:36,288 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:24,524 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2019-11-23 20:13:24,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:24,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:13:24,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-11-23 20:13:24,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:24,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 14] total 52 [2019-11-23 20:13:24,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603197979] [2019-11-23 20:13:24,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:13:24,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:24,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:13:24,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=1782, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:13:24,808 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 52 states. [2019-11-23 20:13:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:25,184 INFO L93 Difference]: Finished difference Result 291 states and 302 transitions. [2019-11-23 20:13:25,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:13:25,185 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 177 [2019-11-23 20:13:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:25,186 INFO L225 Difference]: With dead ends: 291 [2019-11-23 20:13:25,187 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 20:13:25,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=870, Invalid=1782, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:13:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 20:13:25,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2019-11-23 20:13:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 20:13:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2019-11-23 20:13:25,196 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 177 [2019-11-23 20:13:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:25,196 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2019-11-23 20:13:25,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:13:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2019-11-23 20:13:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 20:13:25,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:25,197 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:25,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:25,410 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 36 times [2019-11-23 20:13:25,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:25,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747062691] [2019-11-23 20:13:25,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:13:26,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747062691] [2019-11-23 20:13:26,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605258544] [2019-11-23 20:13:26,086 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:27,569 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:13:27,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:27,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:13:27,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2019-11-23 20:13:27,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:27,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2019-11-23 20:13:27,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478843787] [2019-11-23 20:13:27,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:13:27,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:13:27,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:13:27,815 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 52 states. [2019-11-23 20:13:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:28,052 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2019-11-23 20:13:28,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:13:28,055 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 185 [2019-11-23 20:13:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:28,056 INFO L225 Difference]: With dead ends: 299 [2019-11-23 20:13:28,056 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:13:28,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:13:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:13:28,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2019-11-23 20:13:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 20:13:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2019-11-23 20:13:28,062 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2019-11-23 20:13:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:28,062 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2019-11-23 20:13:28,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:13:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2019-11-23 20:13:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 20:13:28,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:28,064 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:28,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:28,269 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 37 times [2019-11-23 20:13:28,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:28,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41993788] [2019-11-23 20:13:28,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:28,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41993788] [2019-11-23 20:13:28,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851106978] [2019-11-23 20:13:28,953 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:29,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:13:29,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:29,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:29,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:13:29,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556164472] [2019-11-23 20:13:29,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:13:29,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:13:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:13:29,124 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 43 states. [2019-11-23 20:13:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:29,268 INFO L93 Difference]: Finished difference Result 302 states and 310 transitions. [2019-11-23 20:13:29,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:13:29,268 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 189 [2019-11-23 20:13:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:29,270 INFO L225 Difference]: With dead ends: 302 [2019-11-23 20:13:29,270 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 20:13:29,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:13:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 20:13:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2019-11-23 20:13:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:13:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 20:13:29,276 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2019-11-23 20:13:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:29,276 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 20:13:29,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:13:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 20:13:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 20:13:29,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:29,278 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:29,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:29,481 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1454751974, now seen corresponding path program 38 times [2019-11-23 20:13:29,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:29,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148489151] [2019-11-23 20:13:29,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:30,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148489151] [2019-11-23 20:13:30,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029372836] [2019-11-23 20:13:30,457 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:30,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:30,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:30,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:13:30,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:30,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:30,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 20:13:30,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016566020] [2019-11-23 20:13:30,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:13:30,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:30,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:13:30,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:13:30,685 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 44 states. [2019-11-23 20:13:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:30,840 INFO L93 Difference]: Finished difference Result 304 states and 312 transitions. [2019-11-23 20:13:30,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:13:30,841 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 191 [2019-11-23 20:13:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:30,842 INFO L225 Difference]: With dead ends: 304 [2019-11-23 20:13:30,842 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:13:30,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:13:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:13:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 20:13:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:13:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 20:13:30,848 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2019-11-23 20:13:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:30,849 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 20:13:30,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:13:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 20:13:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:13:30,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:30,850 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:31,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:31,054 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1105720228, now seen corresponding path program 39 times [2019-11-23 20:13:31,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:31,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096598619] [2019-11-23 20:13:31,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat