/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_09.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:37:02,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:37:02,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:37:02,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:37:02,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:37:02,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:37:02,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:37:02,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:37:02,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:37:02,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:37:02,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:37:02,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:37:02,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:37:02,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:37:02,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:37:02,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:37:02,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:37:02,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:37:02,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:37:02,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:37:02,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:37:02,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:37:02,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:37:02,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:37:02,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:37:02,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:37:02,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:37:02,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:37:02,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:37:02,701 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:37:02,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:37:02,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:37:02,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:37:02,704 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:37:02,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:37:02,705 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:37:02,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:37:02,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:37:02,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:37:02,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:37:02,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:37:02,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:37:02,707 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:37:02,708 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:37:02,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:37:02,708 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:37:02,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:37:02,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:37:02,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:37:02,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:37:02,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:37:02,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:37:02,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:37:02,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:37:02,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:37:02,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:37:02,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:37:02,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:37:02,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:37:03,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:37:03,016 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:37:03,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:37:03,022 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:37:03,023 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:37:03,024 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_09.i [2019-11-23 20:37:03,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5853b61f4/57bddd09389342a09c1ea2c45d150624/FLAGa5eb5ef20 [2019-11-23 20:37:03,539 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:37:03,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_09.i [2019-11-23 20:37:03,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5853b61f4/57bddd09389342a09c1ea2c45d150624/FLAGa5eb5ef20 [2019-11-23 20:37:03,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5853b61f4/57bddd09389342a09c1ea2c45d150624 [2019-11-23 20:37:03,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:37:03,929 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:37:03,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:37:03,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:37:03,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:37:03,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:03" (1/1) ... [2019-11-23 20:37:03,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b68018e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:03, skipping insertion in model container [2019-11-23 20:37:03,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:03" (1/1) ... [2019-11-23 20:37:03,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:37:03,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:37:04,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:37:04,129 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:37:04,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:37:04,165 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:37:04,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04 WrapperNode [2019-11-23 20:37:04,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:37:04,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:37:04,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:37:04,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:37:04,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:37:04,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:37:04,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:37:04,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:37:04,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... [2019-11-23 20:37:04,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:37:04,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:37:04,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:37:04,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:37:04,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:37:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:37:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:37:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:37:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:37:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:37:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:37:04,577 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:37:04,578 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:37:04,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:04 BoogieIcfgContainer [2019-11-23 20:37:04,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:37:04,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:37:04,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:37:04,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:37:04,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:03" (1/3) ... [2019-11-23 20:37:04,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232400f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:04, skipping insertion in model container [2019-11-23 20:37:04,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:04" (2/3) ... [2019-11-23 20:37:04,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232400f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:04, skipping insertion in model container [2019-11-23 20:37:04,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:04" (3/3) ... [2019-11-23 20:37:04,587 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2019-11-23 20:37:04,597 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:37:04,605 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:37:04,616 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:37:04,639 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:37:04,639 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:37:04,639 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:37:04,639 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:37:04,640 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:37:04,640 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:37:04,640 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:37:04,640 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:37:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:37:04,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:37:04,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:04,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:04,659 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:04,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:04,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2019-11-23 20:37:04,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:04,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103192438] [2019-11-23 20:37:04,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:04,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103192438] [2019-11-23 20:37:04,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:37:04,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:37:04,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303441839] [2019-11-23 20:37:04,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:37:04,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:37:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:37:04,848 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 20:37:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:04,926 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-11-23 20:37:04,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:37:04,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:37:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:04,938 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:37:04,938 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:37:04,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:37:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:37:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:37:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:37:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 20:37:04,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-11-23 20:37:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:04,985 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 20:37:04,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:37:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 20:37:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:37:04,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:04,986 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:04,986 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:04,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:04,987 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2019-11-23 20:37:04,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:04,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653639587] [2019-11-23 20:37:04,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:37:05,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653639587] [2019-11-23 20:37:05,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:37:05,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:37:05,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125566181] [2019-11-23 20:37:05,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:37:05,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:37:05,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:37:05,040 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-23 20:37:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:05,077 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-23 20:37:05,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:37:05,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:37:05,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:05,079 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:37:05,080 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:37:05,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:37:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:37:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-23 20:37:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:37:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:37:05,085 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2019-11-23 20:37:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:05,086 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:37:05,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:37:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:37:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:37:05,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:05,087 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:05,087 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:05,087 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2019-11-23 20:37:05,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:05,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125358956] [2019-11-23 20:37:05,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:37:05,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125358956] [2019-11-23 20:37:05,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843754054] [2019-11-23 20:37:05,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:05,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:37:05,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:37:05,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:05,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:37:05,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708008083] [2019-11-23 20:37:05,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:37:05,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:05,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:37:05,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:37:05,330 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 6 states. [2019-11-23 20:37:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:05,410 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-23 20:37:05,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:37:05,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 20:37:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:05,413 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:37:05,413 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:37:05,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:37:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:37:05,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2019-11-23 20:37:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:37:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:37:05,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:37:05,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:05,424 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:37:05,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:37:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:37:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:37:05,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:05,425 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:05,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:05,629 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:05,630 INFO L82 PathProgramCache]: Analyzing trace with hash -588918413, now seen corresponding path program 2 times [2019-11-23 20:37:05,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:05,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636883790] [2019-11-23 20:37:05,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:37:05,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636883790] [2019-11-23 20:37:05,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999088319] [2019-11-23 20:37:05,726 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:05,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:05,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:05,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:37:05,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:37:05,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:05,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 20:37:05,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225300903] [2019-11-23 20:37:05,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:37:05,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:37:05,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:05,846 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2019-11-23 20:37:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:05,944 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-23 20:37:05,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:37:05,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 20:37:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:05,946 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:37:05,946 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:37:05,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:37:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-11-23 20:37:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:37:05,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:37:05,959 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2019-11-23 20:37:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:05,960 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:37:05,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:37:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:37:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:37:05,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:05,963 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:06,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:06,172 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash -825242030, now seen corresponding path program 3 times [2019-11-23 20:37:06,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:06,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624263957] [2019-11-23 20:37:06,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:37:06,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624263957] [2019-11-23 20:37:06,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168531018] [2019-11-23 20:37:06,313 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:06,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:37:06,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:06,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:37:06,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:37:06,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:06,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:37:06,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107204287] [2019-11-23 20:37:06,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:37:06,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:37:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:37:06,378 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-11-23 20:37:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:06,435 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-11-23 20:37:06,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:37:06,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:37:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:06,437 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:37:06,437 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:37:06,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:37:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:37:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 21. [2019-11-23 20:37:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:37:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:37:06,444 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-11-23 20:37:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:06,444 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:37:06,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:37:06,445 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:37:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:37:06,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:06,445 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:06,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:06,650 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash 238747000, now seen corresponding path program 4 times [2019-11-23 20:37:06,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:06,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042469576] [2019-11-23 20:37:06,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:37:06,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042469576] [2019-11-23 20:37:06,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332754164] [2019-11-23 20:37:06,787 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:06,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:06,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:06,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:37:06,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:37:06,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:06,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-11-23 20:37:06,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316961383] [2019-11-23 20:37:06,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:37:06,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:37:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:37:06,917 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 14 states. [2019-11-23 20:37:07,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:07,077 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2019-11-23 20:37:07,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:37:07,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-11-23 20:37:07,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:07,079 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:37:07,079 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:37:07,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:37:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:37:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 27. [2019-11-23 20:37:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:37:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-23 20:37:07,093 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2019-11-23 20:37:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:07,093 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-23 20:37:07,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:37:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-23 20:37:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:37:07,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:07,096 INFO L410 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:07,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:07,297 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1524497271, now seen corresponding path program 5 times [2019-11-23 20:37:07,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:07,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470605128] [2019-11-23 20:37:07,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:37:07,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470605128] [2019-11-23 20:37:07,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115220796] [2019-11-23 20:37:07,418 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:07,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:37:07,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:07,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:37:07,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:37:07,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:07,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:37:07,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252302854] [2019-11-23 20:37:07,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:37:07,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:07,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:37:07,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:07,751 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2019-11-23 20:37:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:07,841 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2019-11-23 20:37:07,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:37:07,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-11-23 20:37:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:07,842 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:37:07,842 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:37:07,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:07,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:37:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 28. [2019-11-23 20:37:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:37:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 20:37:07,850 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2019-11-23 20:37:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:07,850 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 20:37:07,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:37:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 20:37:07,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:37:07,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:07,852 INFO L410 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:08,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:08,065 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash 66221299, now seen corresponding path program 6 times [2019-11-23 20:37:08,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:08,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652168776] [2019-11-23 20:37:08,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:37:08,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652168776] [2019-11-23 20:37:08,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019141195] [2019-11-23 20:37:08,190 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:08,553 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:37:08,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:08,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:37:08,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:37:08,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:08,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:37:08,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149858168] [2019-11-23 20:37:08,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:37:08,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:37:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:37:08,575 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2019-11-23 20:37:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:08,684 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2019-11-23 20:37:08,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:37:08,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-11-23 20:37:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:08,686 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:37:08,687 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:37:08,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:37:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:37:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 29. [2019-11-23 20:37:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:37:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-23 20:37:08,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2019-11-23 20:37:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:08,694 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-23 20:37:08,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:37:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-23 20:37:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:37:08,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:08,695 INFO L410 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:08,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:08,908 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2104306423, now seen corresponding path program 7 times [2019-11-23 20:37:08,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:08,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981522517] [2019-11-23 20:37:08,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:37:09,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981522517] [2019-11-23 20:37:09,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353673472] [2019-11-23 20:37:09,059 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:09,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:37:09,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:37:09,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:09,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2019-11-23 20:37:09,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206186436] [2019-11-23 20:37:09,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:37:09,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:37:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:09,240 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 21 states. [2019-11-23 20:37:09,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:09,362 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2019-11-23 20:37:09,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:37:09,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2019-11-23 20:37:09,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:09,364 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:37:09,364 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:37:09,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:37:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 37. [2019-11-23 20:37:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:37:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-23 20:37:09,371 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2019-11-23 20:37:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:09,371 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-23 20:37:09,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:37:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-23 20:37:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:37:09,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:09,373 INFO L410 BasicCegarLoop]: trace histogram [18, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:09,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:09,583 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:09,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1266653240, now seen corresponding path program 8 times [2019-11-23 20:37:09,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:09,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667323567] [2019-11-23 20:37:09,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:37:09,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667323567] [2019-11-23 20:37:09,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285727989] [2019-11-23 20:37:09,747 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:09,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:09,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:09,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:37:09,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:37:10,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:10,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21] total 29 [2019-11-23 20:37:10,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452259076] [2019-11-23 20:37:10,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:37:10,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:37:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:37:10,055 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 29 states. [2019-11-23 20:37:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:10,209 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2019-11-23 20:37:10,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:37:10,210 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 35 [2019-11-23 20:37:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:10,211 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:37:10,211 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:37:10,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:37:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:37:10,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2019-11-23 20:37:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:37:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-23 20:37:10,225 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2019-11-23 20:37:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:10,225 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-23 20:37:10,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:37:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-23 20:37:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:37:10,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:10,228 INFO L410 BasicCegarLoop]: trace histogram [26, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:10,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:10,441 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -643280174, now seen corresponding path program 9 times [2019-11-23 20:37:10,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:10,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373910581] [2019-11-23 20:37:10,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:37:10,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373910581] [2019-11-23 20:37:10,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812135511] [2019-11-23 20:37:10,573 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:10,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:37:10,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:11,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:37:11,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:37:11,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:11,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:37:11,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931640715] [2019-11-23 20:37:11,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:37:11,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:11,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:37:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:11,024 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 13 states. [2019-11-23 20:37:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:11,159 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2019-11-23 20:37:11,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:37:11,161 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-11-23 20:37:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:11,162 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:37:11,162 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:37:11,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:37:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 47. [2019-11-23 20:37:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:37:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2019-11-23 20:37:11,178 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2019-11-23 20:37:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:11,179 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2019-11-23 20:37:11,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:37:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2019-11-23 20:37:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:37:11,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:11,180 INFO L410 BasicCegarLoop]: trace histogram [26, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:11,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:11,392 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1584597240, now seen corresponding path program 10 times [2019-11-23 20:37:11,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:11,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416361997] [2019-11-23 20:37:11,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:37:11,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416361997] [2019-11-23 20:37:11,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841386466] [2019-11-23 20:37:11,541 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:11,653 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:11,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:11,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:37:11,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:37:11,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:11,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 29] total 38 [2019-11-23 20:37:11,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761148045] [2019-11-23 20:37:11,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:37:11,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:37:11,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:37:11,971 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 38 states. [2019-11-23 20:37:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:12,170 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2019-11-23 20:37:12,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:37:12,170 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-11-23 20:37:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:12,172 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:37:12,172 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:37:12,174 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:37:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:37:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 57. [2019-11-23 20:37:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:37:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-23 20:37:12,182 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 45 [2019-11-23 20:37:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:12,182 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-23 20:37:12,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:37:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-23 20:37:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:37:12,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:12,184 INFO L410 BasicCegarLoop]: trace histogram [35, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:12,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:12,389 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:12,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1890783863, now seen corresponding path program 11 times [2019-11-23 20:37:12,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:12,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801039611] [2019-11-23 20:37:12,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-23 20:37:12,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801039611] [2019-11-23 20:37:12,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4282049] [2019-11-23 20:37:12,551 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:53,519 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 20:38:53,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:53,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:38:53,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:38:53,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:53,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 38] total 47 [2019-11-23 20:38:53,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786211353] [2019-11-23 20:38:53,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:38:53,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:53,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:38:53,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=1082, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:38:53,927 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 47 states. [2019-11-23 20:38:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:54,190 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2019-11-23 20:38:54,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:38:54,190 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2019-11-23 20:38:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:54,191 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:38:54,191 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:38:54,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1080, Invalid=1082, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:38:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:38:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2019-11-23 20:38:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:38:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2019-11-23 20:38:54,200 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 55 [2019-11-23 20:38:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:54,200 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2019-11-23 20:38:54,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:38:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2019-11-23 20:38:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:38:54,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:54,202 INFO L410 BasicCegarLoop]: trace histogram [44, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:54,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:54,408 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash -371745128, now seen corresponding path program 12 times [2019-11-23 20:38:54,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:54,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979667350] [2019-11-23 20:38:54,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2019-11-23 20:38:54,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979667350] [2019-11-23 20:38:54,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763134759] [2019-11-23 20:38:54,571 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true