/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bAnd2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:35:32,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:35:32,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:35:32,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:35:32,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:35:32,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:35:32,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:35:32,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:35:32,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:35:32,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:35:32,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:35:32,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:35:32,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:35:32,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:35:32,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:35:32,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:35:32,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:35:32,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:35:32,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:35:32,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:35:32,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:35:32,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:35:32,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:35:32,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:35:32,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:35:32,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:35:32,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:35:32,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:35:32,309 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 [2019-11-06 18:35:32,330 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:35:32,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:35:32,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:35:32,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:35:32,335 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:35:32,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:35:32,335 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:35:32,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:35:32,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:35:32,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:35:32,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:35:32,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:35:32,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:35:32,337 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:35:32,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:35:32,338 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:35:32,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:35:32,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:35:32,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:35:32,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:35:32,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:35:32,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:35:32,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:35:32,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:35:32,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:35:32,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:35:32,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:35:32,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:35:32,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:35:32,647 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:35:32,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:35:32,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:35:32,672 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:35:32,673 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:35:32,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd2.i [2019-11-06 18:35:32,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cd0febf5/acd114c233364606a45ebd56dffe74e4/FLAG99bdb3d73 [2019-11-06 18:35:33,197 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:35:33,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd2.i [2019-11-06 18:35:33,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cd0febf5/acd114c233364606a45ebd56dffe74e4/FLAG99bdb3d73 [2019-11-06 18:35:33,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cd0febf5/acd114c233364606a45ebd56dffe74e4 [2019-11-06 18:35:33,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:35:33,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:35:33,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:33,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:35:33,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:35:33,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4832efb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33, skipping insertion in model container [2019-11-06 18:35:33,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,621 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:35:33,643 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:35:33,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:33,873 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:35:33,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:33,918 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:35:33,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33 WrapperNode [2019-11-06 18:35:33,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:33,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:35:33,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:35:33,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:35:33,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:33,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:34,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:34,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:34,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (1/1) ... [2019-11-06 18:35:34,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:35:34,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:35:34,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:35:34,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:35:34,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (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 [2019-11-06 18:35:34,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:35:34,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:35:34,082 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2019-11-06 18:35:34,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:35:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:35:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:35:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2019-11-06 18:35:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:35:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:35:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:35:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:35:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:35:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:35:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:35:34,390 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:35:34,390 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:35:34,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:34 BoogieIcfgContainer [2019-11-06 18:35:34,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:35:34,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:35:34,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:35:34,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:35:34,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:35:33" (1/3) ... [2019-11-06 18:35:34,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbd21a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:33" (2/3) ... [2019-11-06 18:35:34,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbd21a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:34" (3/3) ... [2019-11-06 18:35:34,399 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2019-11-06 18:35:34,409 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:35:34,417 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:35:34,430 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:35:34,455 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:35:34,455 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:35:34,455 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:35:34,455 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:35:34,455 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:35:34,456 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:35:34,456 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:35:34,456 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:35:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:35:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:34,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:34,479 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:34,481 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-11-06 18:35:34,493 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:34,493 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141124857] [2019-11-06 18:35:34,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:34,729 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141124857] [2019-11-06 18:35:34,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:35:34,734 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:35:34,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836298782] [2019-11-06 18:35:34,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:34,746 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:34,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:34,770 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:35:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:34,897 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:35:34,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:34,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:34,910 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:35:34,911 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:35:34,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:35:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:35:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:35:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:35:34,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:35:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:34,979 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:35:34,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:35:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:34,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:34,984 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:34,984 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:34,985 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-11-06 18:35:34,985 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:34,986 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492791318] [2019-11-06 18:35:34,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:35:35,125 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492791318] [2019-11-06 18:35:35,126 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558645623] [2019-11-06 18:35:35,126 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 [2019-11-06 18:35:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:35,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:35,282 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:35,283 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:35:35,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109815059] [2019-11-06 18:35:35,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:35,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:35,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:35,288 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:35:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:35,312 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:35:35,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:35,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:35,314 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:35,314 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:35:35,315 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:35:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:35:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:35:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:35:35,333 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:35:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,335 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:35:35,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:35:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:35:35,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,337 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:35,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,544 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-11-06 18:35:35,546 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,546 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46166061] [2019-11-06 18:35:35,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:35:35,673 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46166061] [2019-11-06 18:35:35,673 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412784502] [2019-11-06 18:35:35,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:35,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:35:35,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:35,742 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:35:35,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628831899] [2019-11-06 18:35:35,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:35,744 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:35,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:35,745 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:35:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:35,765 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:35:35,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:35,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:35:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:35,767 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:35,767 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:35:35,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:35:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:35:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:35:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:35:35,775 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:35:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,776 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:35:35,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:35:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:35:35,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,778 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:35,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:35,990 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-11-06 18:35:35,991 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,991 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679577784] [2019-11-06 18:35:35,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:36,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679577784] [2019-11-06 18:35:36,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073184845] [2019-11-06 18:35:36,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:36,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:35:36,191 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:36,192 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:35:36,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991061515] [2019-11-06 18:35:36,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:36,193 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:36,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:36,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:36,194 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:35:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:36,212 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:35:36,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:36,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:35:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:36,227 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:35:36,227 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:35:36,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:35:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:35:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:35:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:35:36,240 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:35:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:36,242 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:35:36,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:35:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:35:36,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:36,246 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:36,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,453 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:36,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-11-06 18:35:36,455 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:36,455 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087616035] [2019-11-06 18:35:36,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:36,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087616035] [2019-11-06 18:35:36,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702031028] [2019-11-06 18:35:36,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:35:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:36,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:35:36,674 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:36,674 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:35:36,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967325446] [2019-11-06 18:35:36,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:35:36,675 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:36,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:35:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:35:36,676 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:35:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:36,816 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:35:36,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:35:36,819 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:35:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:36,820 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:35:36,820 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:35:36,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:35:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:35:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:35:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:35:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:35:36,833 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:35:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:36,837 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:35:36,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:35:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:35:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:35:36,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:36,838 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 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] [2019-11-06 18:35:37,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,039 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:37,040 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-11-06 18:35:37,040 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:37,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169513704] [2019-11-06 18:35:37,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,133 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169513704] [2019-11-06 18:35:37,133 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926406944] [2019-11-06 18:35:37,133 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 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 [2019-11-06 18:35:37,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:37,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:37,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:37,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,252 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:37,252 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:35:37,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237577552] [2019-11-06 18:35:37,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:35:37,255 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:35:37,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:37,257 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:35:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:37,357 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:35:37,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:35:37,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:35:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:37,360 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:35:37,360 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:35:37,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:35:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:35:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:35:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:35:37,373 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:35:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:37,374 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:35:37,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:35:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:35:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:35:37,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:37,376 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:37,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,582 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-11-06 18:35:37,583 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:37,584 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651969240] [2019-11-06 18:35:37,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651969240] [2019-11-06 18:35:37,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820275530] [2019-11-06 18:35:37,692 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 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 [2019-11-06 18:35:37,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:35:37,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:37,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:37,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:35:37,802 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:37,802 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:35:37,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784329541] [2019-11-06 18:35:37,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:37,803 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:37,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:37,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:37,804 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:35:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:37,935 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:35:37,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:35:37,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:35:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:37,939 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:35:37,939 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:35:37,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:35:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:35:37,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:35:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:35:37,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:35:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:37,949 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:35:37,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:35:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:35:37,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:37,951 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:38,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,157 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:38,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-11-06 18:35:38,158 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:38,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688380064] [2019-11-06 18:35:38,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688380064] [2019-11-06 18:35:38,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744880573] [2019-11-06 18:35:38,299 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 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 [2019-11-06 18:35:38,375 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:38,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:38,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:38,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,416 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:38,416 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:35:38,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848240858] [2019-11-06 18:35:38,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:38,417 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:38,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:38,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,418 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:35:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:38,531 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:35:38,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:35:38,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:35:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:38,533 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:35:38,533 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:35:38,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:35:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:35:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:35:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:35:38,543 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:35:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:38,544 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:35:38,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:35:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:35:38,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:38,545 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:38,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,749 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:38,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-11-06 18:35:38,750 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:38,750 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604910100] [2019-11-06 18:35:38,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604910100] [2019-11-06 18:35:38,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366797213] [2019-11-06 18:35:38,860 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 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 [2019-11-06 18:35:38,957 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:35:38,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:38,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:38,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:35:39,008 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:39,008 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:35:39,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001972817] [2019-11-06 18:35:39,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:39,010 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:39,011 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:35:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:39,173 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:35:39,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:39,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:35:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:39,175 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:35:39,175 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:35:39,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:35:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:35:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:35:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:35:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:35:39,182 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:35:39,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:39,182 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:35:39,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:35:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:35:39,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:39,184 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:39,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,385 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:39,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:39,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-11-06 18:35:39,386 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:39,386 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794413220] [2019-11-06 18:35:39,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:35:39,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794413220] [2019-11-06 18:35:39,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737215547] [2019-11-06 18:35:39,500 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 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 [2019-11-06 18:35:39,564 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:35:39,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:39,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:39,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:35:39,612 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:39,612 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:35:39,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94769409] [2019-11-06 18:35:39,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:35:39,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:39,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:35:39,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:35:39,614 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:35:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:39,798 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:35:39,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:35:39,799 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:35:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:39,800 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:35:39,800 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:35:39,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:35:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:35:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:35:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:35:39,807 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:35:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:39,807 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:35:39,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:35:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:35:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:35:39,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:39,809 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:40,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,024 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-11-06 18:35:40,025 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:40,025 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003965736] [2019-11-06 18:35:40,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,138 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003965736] [2019-11-06 18:35:40,138 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347036817] [2019-11-06 18:35:40,138 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 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 [2019-11-06 18:35:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:40,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,214 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:40,215 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:35:40,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740537499] [2019-11-06 18:35:40,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:40,216 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:40,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:40,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:40,216 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:35:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:40,283 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:35:40,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:35:40,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:35:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:40,284 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:35:40,284 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:35:40,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:35:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:35:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:35:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:35:40,290 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:35:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:40,291 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:35:40,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:35:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:35:40,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:40,292 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:40,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,497 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-11-06 18:35:40,498 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:40,498 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661933967] [2019-11-06 18:35:40,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661933967] [2019-11-06 18:35:40,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693170130] [2019-11-06 18:35:40,625 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 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 [2019-11-06 18:35:40,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:40,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:40,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:35:40,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,712 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:40,712 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:35:40,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757208016] [2019-11-06 18:35:40,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:35:40,713 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:40,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:35:40,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:40,713 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:35:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:40,815 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:35:40,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:40,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:35:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:40,817 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:35:40,817 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:35:40,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:35:40,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:35:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:35:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:35:40,824 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:35:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:40,825 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:35:40,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:35:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:35:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:35:40,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:40,826 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:41,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,030 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-11-06 18:35:41,031 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:41,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598050462] [2019-11-06 18:35:41,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:41,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598050462] [2019-11-06 18:35:41,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820937008] [2019-11-06 18:35:41,180 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 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 [2019-11-06 18:35:41,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:35:41,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:41,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:41,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:35:41,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:41,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:35:41,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458425258] [2019-11-06 18:35:41,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:35:41,312 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:35:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:41,313 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:35:41,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:41,493 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:35:41,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:35:41,504 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:35:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:41,505 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:35:41,505 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:35:41,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:35:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:35:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:35:41,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:35:41,522 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:35:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:41,522 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:35:41,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:35:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:35:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:35:41,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:41,524 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:41,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,725 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-11-06 18:35:41,726 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:41,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060181117] [2019-11-06 18:35:41,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:35:41,881 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060181117] [2019-11-06 18:35:41,881 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557978605] [2019-11-06 18:35:41,881 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 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 [2019-11-06 18:35:41,973 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:41,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:41,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:41,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:35:42,065 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:42,065 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:35:42,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484592722] [2019-11-06 18:35:42,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:42,067 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:42,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:42,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:42,068 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:35:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:42,339 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:35:42,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:35:42,340 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:35:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:42,341 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:35:42,341 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:35:42,342 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:35:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:35:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:35:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:35:42,348 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:35:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:42,349 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:35:42,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:35:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:35:42,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:42,350 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:42,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:42,561 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-11-06 18:35:42,562 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:42,562 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201547201] [2019-11-06 18:35:42,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:35:42,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201547201] [2019-11-06 18:35:42,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376283750] [2019-11-06 18:35:42,727 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 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 [2019-11-06 18:35:43,056 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:35:43,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:43,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:43,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:35:43,148 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:43,148 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:35:43,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176878711] [2019-11-06 18:35:43,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:43,164 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:43,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:43,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:43,165 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:35:43,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:43,444 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:35:43,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:35:43,444 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:35:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:43,445 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:35:43,445 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:35:43,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:35:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:35:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:35:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:35:43,452 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:35:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:43,452 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:35:43,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:35:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:35:43,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:43,453 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:43,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:43,664 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:43,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-11-06 18:35:43,665 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:43,665 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489532061] [2019-11-06 18:35:43,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:35:43,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489532061] [2019-11-06 18:35:43,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884400604] [2019-11-06 18:35:43,846 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 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 [2019-11-06 18:35:44,027 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:35:44,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:44,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:44,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:35:44,092 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:44,092 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:35:44,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617151249] [2019-11-06 18:35:44,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:35:44,093 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:44,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:35:44,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:44,094 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:35:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:44,278 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:35:44,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:44,279 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:35:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:44,280 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:35:44,280 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:35:44,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:35:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:35:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:35:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:35:44,288 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:35:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:44,288 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:35:44,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:35:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:35:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:35:44,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:44,289 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:44,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,493 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-11-06 18:35:44,494 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:44,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375508741] [2019-11-06 18:35:44,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:44,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375508741] [2019-11-06 18:35:44,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461310995] [2019-11-06 18:35:44,680 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 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 [2019-11-06 18:35:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:35:44,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:44,821 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:44,822 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:35:44,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077543554] [2019-11-06 18:35:44,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:35:44,824 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:35:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:44,825 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:35:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:44,979 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:35:44,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:35:44,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:35:44,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:44,980 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:35:44,980 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:35:44,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:35:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:35:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:35:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:35:44,991 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:35:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:44,993 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:35:44,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:35:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:35:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:35:44,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:44,995 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:45,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,199 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:45,199 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-11-06 18:35:45,199 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:45,199 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917949622] [2019-11-06 18:35:45,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917949622] [2019-11-06 18:35:45,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288334668] [2019-11-06 18:35:45,381 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 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 [2019-11-06 18:35:45,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:45,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:45,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:35:45,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,497 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:45,497 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:35:45,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856596749] [2019-11-06 18:35:45,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:45,500 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:45,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:45,500 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:35:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:45,621 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:35:45,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:35:45,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:35:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:45,622 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:35:45,623 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:35:45,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:35:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:35:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:35:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:35:45,634 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:35:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:45,634 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:35:45,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:35:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:35:45,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:45,636 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:45,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,840 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:45,840 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-11-06 18:35:45,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:45,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139539503] [2019-11-06 18:35:45,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:46,219 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139539503] [2019-11-06 18:35:46,219 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967511954] [2019-11-06 18:35:46,219 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 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 [2019-11-06 18:35:46,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:35:46,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:46,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:46,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:35:46,582 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:46,583 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:35:46,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266593060] [2019-11-06 18:35:46,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:46,584 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:46,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:46,599 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:35:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:46,861 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:35:46,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:46,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:35:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:46,863 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:35:46,863 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:35:46,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:35:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:35:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:35:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:35:46,870 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:35:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:46,870 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:35:46,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:35:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:35:46,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:46,892 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:47,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:47,101 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-11-06 18:35:47,101 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:47,101 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660362037] [2019-11-06 18:35:47,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:47,346 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660362037] [2019-11-06 18:35:47,346 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548391447] [2019-11-06 18:35:47,346 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 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 [2019-11-06 18:35:47,439 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:47,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:47,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:35:47,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:47,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:47,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:35:47,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708956490] [2019-11-06 18:35:47,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:47,467 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:47,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:47,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:47,467 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:35:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:47,617 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:35:47,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:47,618 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:35:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:47,618 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:35:47,619 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:35:47,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:35:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:35:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:35:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:35:47,624 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:35:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:47,624 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:35:47,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:35:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:35:47,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:47,626 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:47,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:47,827 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-11-06 18:35:47,827 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:47,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392754922] [2019-11-06 18:35:47,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:48,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392754922] [2019-11-06 18:35:48,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414140715] [2019-11-06 18:35:48,112 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 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 [2019-11-06 18:35:48,975 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:35:48,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:48,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:48,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:35:49,091 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:49,091 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:35:49,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966639431] [2019-11-06 18:35:49,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:49,092 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:49,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:49,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:49,093 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:35:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:49,466 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:35:49,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:49,467 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:35:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:49,468 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:35:49,468 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:35:49,469 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:35:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:35:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:35:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:35:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:35:49,474 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:35:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:49,475 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:35:49,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:35:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:35:49,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:49,476 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:49,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:49,681 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-11-06 18:35:49,682 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:49,682 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810307905] [2019-11-06 18:35:49,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:35:49,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810307905] [2019-11-06 18:35:49,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48342010] [2019-11-06 18:35:49,949 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 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 [2019-11-06 18:35:50,654 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:35:50,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:50,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:35:50,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 269 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-06 18:35:50,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:50,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-11-06 18:35:50,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672411491] [2019-11-06 18:35:50,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:35:50,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:35:50,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:35:50,793 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 30 states. [2019-11-06 18:35:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:51,195 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2019-11-06 18:35:51,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:35:51,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2019-11-06 18:35:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:51,198 INFO L225 Difference]: With dead ends: 130 [2019-11-06 18:35:51,198 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:35:51,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:35:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:35:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:35:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:35:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:35:51,206 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 120 [2019-11-06 18:35:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:51,207 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:35:51,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:35:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:35:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:35:51,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:51,209 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:51,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,409 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:51,410 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 19 times [2019-11-06 18:35:51,410 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:51,410 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161381100] [2019-11-06 18:35:51,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:51,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161381100] [2019-11-06 18:35:51,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156495604] [2019-11-06 18:35:51,735 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 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 [2019-11-06 18:35:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:35:51,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:51,846 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:51,846 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:35:51,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971074726] [2019-11-06 18:35:51,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:35:51,847 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:51,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:35:51,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:51,848 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:35:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:51,952 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:35:51,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:51,952 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:35:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:51,953 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:35:51,953 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:35:51,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:51,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:35:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:35:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:35:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:35:51,958 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:35:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:51,959 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:35:51,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:35:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:35:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:35:51,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:51,960 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:52,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:52,164 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:52,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:52,165 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 20 times [2019-11-06 18:35:52,165 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:52,165 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650900945] [2019-11-06 18:35:52,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:52,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650900945] [2019-11-06 18:35:52,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241141866] [2019-11-06 18:35:52,477 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 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 [2019-11-06 18:35:52,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:52,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:52,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:35:52,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:52,633 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:52,633 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-11-06 18:35:52,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139499799] [2019-11-06 18:35:52,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:35:52,634 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:52,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:35:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:35:52,636 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 26 states. [2019-11-06 18:35:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:52,859 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2019-11-06 18:35:52,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:35:52,859 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-11-06 18:35:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:52,860 INFO L225 Difference]: With dead ends: 136 [2019-11-06 18:35:52,861 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:35:52,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:35:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:35:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-11-06 18:35:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-06 18:35:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-11-06 18:35:52,868 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 128 [2019-11-06 18:35:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:52,869 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-11-06 18:35:52,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:35:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-11-06 18:35:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 18:35:52,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:52,871 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:53,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:53,076 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2078845859, now seen corresponding path program 21 times [2019-11-06 18:35:53,076 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:53,077 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515488106] [2019-11-06 18:35:53,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:53,642 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515488106] [2019-11-06 18:35:53,643 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931913693] [2019-11-06 18:35:53,643 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 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 [2019-11-06 18:35:53,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:35:53,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:53,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:53,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2019-11-06 18:35:53,903 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:53,903 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2019-11-06 18:35:53,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88619932] [2019-11-06 18:35:53,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 18:35:53,904 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:53,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 18:35:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:35:53,905 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 33 states. [2019-11-06 18:35:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:54,179 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-11-06 18:35:54,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-06 18:35:54,179 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-11-06 18:35:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:54,180 INFO L225 Difference]: With dead ends: 141 [2019-11-06 18:35:54,180 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:35:54,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:35:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:35:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-11-06 18:35:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:35:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:35:54,187 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 130 [2019-11-06 18:35:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:54,188 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:35:54,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-06 18:35:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:35:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:35:54,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:54,189 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:54,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:54,394 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:54,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 22 times [2019-11-06 18:35:54,395 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:54,395 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484542817] [2019-11-06 18:35:54,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:54,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484542817] [2019-11-06 18:35:54,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590371696] [2019-11-06 18:35:54,746 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 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 [2019-11-06 18:35:54,851 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:54,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:54,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:35:54,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:54,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:54,902 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-11-06 18:35:54,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902454452] [2019-11-06 18:35:54,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:54,903 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:54,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:54,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:54,904 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 28 states. [2019-11-06 18:35:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:55,135 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-06 18:35:55,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:35:55,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 134 [2019-11-06 18:35:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:55,137 INFO L225 Difference]: With dead ends: 144 [2019-11-06 18:35:55,137 INFO L226 Difference]: Without dead ends: 100 [2019-11-06 18:35:55,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-06 18:35:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-06 18:35:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-06 18:35:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-11-06 18:35:55,147 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 134 [2019-11-06 18:35:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:55,148 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-11-06 18:35:55,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-11-06 18:35:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 18:35:55,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:55,150 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:55,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:55,355 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:55,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1800218015, now seen corresponding path program 23 times [2019-11-06 18:35:55,356 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:55,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52788958] [2019-11-06 18:35:55,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:55,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52788958] [2019-11-06 18:35:55,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780883916] [2019-11-06 18:35:55,763 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 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 [2019-11-06 18:36:01,107 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-06 18:36:01,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:01,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:01,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2019-11-06 18:36:01,239 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:01,239 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:36:01,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413732872] [2019-11-06 18:36:01,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:36:01,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:36:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:01,241 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 36 states. [2019-11-06 18:36:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:01,695 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-11-06 18:36:01,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:36:01,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2019-11-06 18:36:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:01,697 INFO L225 Difference]: With dead ends: 149 [2019-11-06 18:36:01,697 INFO L226 Difference]: Without dead ends: 105 [2019-11-06 18:36:01,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 18:36:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-06 18:36:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-11-06 18:36:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-06 18:36:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2019-11-06 18:36:01,704 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 136 [2019-11-06 18:36:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:01,704 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2019-11-06 18:36:01,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:36:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2019-11-06 18:36:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 18:36:01,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:01,706 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:01,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:01,913 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1521279999, now seen corresponding path program 24 times [2019-11-06 18:36:01,914 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:01,915 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073792173] [2019-11-06 18:36:01,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:36:02,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073792173] [2019-11-06 18:36:02,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418801210] [2019-11-06 18:36:02,354 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 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 [2019-11-06 18:36:04,002 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:36:04,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:04,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:04,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2019-11-06 18:36:04,182 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:04,182 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2019-11-06 18:36:04,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129616167] [2019-11-06 18:36:04,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 18:36:04,183 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 18:36:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:36:04,184 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 38 states. [2019-11-06 18:36:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:04,702 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2019-11-06 18:36:04,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-06 18:36:04,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2019-11-06 18:36:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:04,703 INFO L225 Difference]: With dead ends: 155 [2019-11-06 18:36:04,704 INFO L226 Difference]: Without dead ends: 109 [2019-11-06 18:36:04,705 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2019-11-06 18:36:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-06 18:36:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-11-06 18:36:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:36:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:36:04,712 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 144 [2019-11-06 18:36:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:04,712 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:36:04,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 18:36:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:36:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 18:36:04,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:04,714 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:04,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:04,915 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -910092193, now seen corresponding path program 25 times [2019-11-06 18:36:04,917 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:04,917 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195236098] [2019-11-06 18:36:04,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:36:05,430 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195236098] [2019-11-06 18:36:05,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398830376] [2019-11-06 18:36:05,431 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 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 [2019-11-06 18:36:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:05,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:36:05,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:36:05,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:05,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:36:05,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90332087] [2019-11-06 18:36:05,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:36:05,633 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:05,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:36:05,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:05,634 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:36:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:05,869 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:36:05,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:36:05,869 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2019-11-06 18:36:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:05,870 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:36:05,870 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:36:05,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:36:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:36:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:36:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:36:05,878 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 152 [2019-11-06 18:36:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:05,879 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:36:05,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:36:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:36:05,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 18:36:05,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:05,880 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:06,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:06,083 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1827051201, now seen corresponding path program 26 times [2019-11-06 18:36:06,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:06,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423512353] [2019-11-06 18:36:06,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:36:06,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423512353] [2019-11-06 18:36:06,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076533001] [2019-11-06 18:36:06,654 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 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 [2019-11-06 18:36:06,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:06,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:06,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:36:06,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:36:06,842 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:06,843 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-11-06 18:36:06,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493456593] [2019-11-06 18:36:06,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:36:06,845 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:36:06,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:36:06,846 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 32 states. [2019-11-06 18:36:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:07,062 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2019-11-06 18:36:07,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 18:36:07,062 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 154 [2019-11-06 18:36:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:07,063 INFO L225 Difference]: With dead ends: 160 [2019-11-06 18:36:07,064 INFO L226 Difference]: Without dead ends: 112 [2019-11-06 18:36:07,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:36:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-06 18:36:07,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-11-06 18:36:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-06 18:36:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-11-06 18:36:07,071 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 154 [2019-11-06 18:36:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:07,071 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-11-06 18:36:07,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:36:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-11-06 18:36:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 18:36:07,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:07,072 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:07,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:07,276 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash -593099613, now seen corresponding path program 27 times [2019-11-06 18:36:07,277 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:07,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282035781] [2019-11-06 18:36:07,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:36:08,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282035781] [2019-11-06 18:36:08,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817115005] [2019-11-06 18:36:08,107 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 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 [2019-11-06 18:36:08,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:36:08,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:08,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:08,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 370 proven. 49 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2019-11-06 18:36:08,531 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:08,532 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2019-11-06 18:36:08,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708927688] [2019-11-06 18:36:08,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:36:08,532 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:08,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:36:08,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:36:08,534 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 40 states. [2019-11-06 18:36:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:08,879 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-11-06 18:36:08,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:36:08,884 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2019-11-06 18:36:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:08,885 INFO L225 Difference]: With dead ends: 165 [2019-11-06 18:36:08,885 INFO L226 Difference]: Without dead ends: 117 [2019-11-06 18:36:08,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:36:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-06 18:36:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-11-06 18:36:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-06 18:36:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2019-11-06 18:36:08,891 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 156 [2019-11-06 18:36:08,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:08,891 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2019-11-06 18:36:08,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:36:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2019-11-06 18:36:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 18:36:08,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:08,893 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:09,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:09,097 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1573539069, now seen corresponding path program 28 times [2019-11-06 18:36:09,098 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:09,098 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282232910] [2019-11-06 18:36:09,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:36:09,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282232910] [2019-11-06 18:36:09,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999779138] [2019-11-06 18:36:09,698 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 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 [2019-11-06 18:36:09,810 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:09,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:09,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:36:09,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2019-11-06 18:36:10,039 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:10,039 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-06 18:36:10,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503711690] [2019-11-06 18:36:10,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-06 18:36:10,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:10,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-06 18:36:10,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1243, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:36:10,041 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 43 states. [2019-11-06 18:36:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:10,549 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2019-11-06 18:36:10,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-06 18:36:10,549 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 160 [2019-11-06 18:36:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:10,551 INFO L225 Difference]: With dead ends: 171 [2019-11-06 18:36:10,551 INFO L226 Difference]: Without dead ends: 121 [2019-11-06 18:36:10,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2019-11-06 18:36:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-06 18:36:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-11-06 18:36:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-06 18:36:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2019-11-06 18:36:10,558 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 160 [2019-11-06 18:36:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:10,558 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2019-11-06 18:36:10,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-06 18:36:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2019-11-06 18:36:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 18:36:10,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:10,560 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:10,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:10,763 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash -451694749, now seen corresponding path program 29 times [2019-11-06 18:36:10,764 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:10,765 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050477091] [2019-11-06 18:36:10,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 18:36:11,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050477091] [2019-11-06 18:36:11,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310481806] [2019-11-06 18:36:11,227 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 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