/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_seq_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:33:46,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:33:46,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:33:46,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:33:46,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:33:46,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:33:46,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:33:46,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:33:46,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:33:46,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:33:46,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:33:46,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:33:46,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:33:46,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:33:46,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:33:46,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:33:46,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:33:46,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:33:46,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:33:46,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:33:46,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:33:46,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:33:46,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:33:46,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:33:46,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:33:46,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:33:46,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:33:46,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:33:46,774 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 20:33:46,793 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:33:46,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:33:46,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:33:46,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:33:46,795 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:33:46,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:33:46,796 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:33:46,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:33:46,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:33:46,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:33:46,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:33:46,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:33:46,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:33:46,798 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:33:46,799 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:33:46,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:33:46,799 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:33:46,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:33:46,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:33:46,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:33:46,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:33:46,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:33:46,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:33:46,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:33:46,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:33:46,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:33:46,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:33:46,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:33:46,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:33:46,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:33:47,087 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:33:47,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:33:47,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:33:47,112 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:33:47,112 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:33:47,113 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_seq_init_ground.i [2019-11-23 20:33:47,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe694e4d0/b5dedde1c36049d1b0feade80bdd7e56/FLAGb7126c3f0 [2019-11-23 20:33:47,659 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:33:47,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_seq_init_ground.i [2019-11-23 20:33:47,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe694e4d0/b5dedde1c36049d1b0feade80bdd7e56/FLAGb7126c3f0 [2019-11-23 20:33:48,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe694e4d0/b5dedde1c36049d1b0feade80bdd7e56 [2019-11-23 20:33:48,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:33:48,043 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:33:48,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:48,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:33:48,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:33:48,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6be2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48, skipping insertion in model container [2019-11-23 20:33:48,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:33:48,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:33:48,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:48,262 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:33:48,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:48,306 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:33:48,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48 WrapperNode [2019-11-23 20:33:48,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:48,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:48,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:33:48,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:33:48,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:48,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:33:48,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:33:48,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:33:48,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2019-11-23 20:33:48,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:33:48,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:33:48,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:33:48,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:33:48,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (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 20:33:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:33:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:33:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:33:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:33:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:33:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:33:48,752 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:33:48,752 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:33:48,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:48 BoogieIcfgContainer [2019-11-23 20:33:48,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:33:48,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:33:48,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:33:48,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:33:48,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:48" (1/3) ... [2019-11-23 20:33:48,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a534ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:48, skipping insertion in model container [2019-11-23 20:33:48,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (2/3) ... [2019-11-23 20:33:48,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a534ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:48, skipping insertion in model container [2019-11-23 20:33:48,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:48" (3/3) ... [2019-11-23 20:33:48,762 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2019-11-23 20:33:48,777 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:33:48,786 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:33:48,808 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:33:48,838 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:33:48,838 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:33:48,838 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:33:48,838 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:33:48,839 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:33:48,839 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:33:48,839 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:33:48,839 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:33:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-23 20:33:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 20:33:48,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:48,860 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:48,861 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2019-11-23 20:33:48,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:48,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316825805] [2019-11-23 20:33:48,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:49,021 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 20:33:49,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316825805] [2019-11-23 20:33:49,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:49,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:33:49,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164792467] [2019-11-23 20:33:49,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:33:49,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:49,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:33:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:33:49,040 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2019-11-23 20:33:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:49,069 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2019-11-23 20:33:49,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:33:49,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 20:33:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:49,079 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:33:49,079 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 20:33:49,082 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 20:33:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 20:33:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 20:33:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 20:33:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-23 20:33:49,109 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2019-11-23 20:33:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:49,110 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-23 20:33:49,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:33:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-23 20:33:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:33:49,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:49,111 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:49,111 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:49,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:49,112 INFO L82 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2019-11-23 20:33:49,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:49,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112827222] [2019-11-23 20:33:49,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:49,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112827222] [2019-11-23 20:33:49,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496885656] [2019-11-23 20:33:49,166 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 20:33:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:49,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:33:49,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:49,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:49,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-11-23 20:33:49,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881186166] [2019-11-23 20:33:49,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:33:49,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:49,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:33:49,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:33:49,251 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2019-11-23 20:33:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:49,273 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-11-23 20:33:49,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:33:49,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-23 20:33:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:49,275 INFO L225 Difference]: With dead ends: 19 [2019-11-23 20:33:49,275 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:33:49,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:33:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:33:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:33:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:33:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 20:33:49,280 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-11-23 20:33:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:49,281 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 20:33:49,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:33:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 20:33:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:33:49,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:49,282 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:49,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:49,486 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:49,487 INFO L82 PathProgramCache]: Analyzing trace with hash 490447920, now seen corresponding path program 2 times [2019-11-23 20:33:49,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:49,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5106275] [2019-11-23 20:33:49,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:49,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5106275] [2019-11-23 20:33:49,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951932816] [2019-11-23 20:33:49,588 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 20:33:49,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:49,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:49,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:33:49,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:49,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:49,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-11-23 20:33:49,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105633288] [2019-11-23 20:33:49,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:33:49,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:49,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:33:49,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:49,640 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2019-11-23 20:33:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:49,661 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-23 20:33:49,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:33:49,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-23 20:33:49,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:49,662 INFO L225 Difference]: With dead ends: 20 [2019-11-23 20:33:49,663 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 20:33:49,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 20:33:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 20:33:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:33:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-23 20:33:49,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-23 20:33:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:49,668 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-23 20:33:49,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:33:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-23 20:33:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:33:49,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:49,669 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:49,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:49,870 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1924507733, now seen corresponding path program 3 times [2019-11-23 20:33:49,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:49,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662756653] [2019-11-23 20:33:49,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:49,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662756653] [2019-11-23 20:33:49,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110492968] [2019-11-23 20:33:49,967 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 20:33:50,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:33:50,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:50,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:33:50,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:50,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:50,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-23 20:33:50,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922402072] [2019-11-23 20:33:50,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:33:50,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:50,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:33:50,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:50,037 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2019-11-23 20:33:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:50,056 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-23 20:33:50,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:33:50,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-23 20:33:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:50,059 INFO L225 Difference]: With dead ends: 21 [2019-11-23 20:33:50,059 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 20:33:50,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 20:33:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 20:33:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:33:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-23 20:33:50,068 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-11-23 20:33:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:50,068 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-23 20:33:50,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:33:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-23 20:33:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:33:50,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:50,069 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:50,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:50,272 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 4 times [2019-11-23 20:33:50,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:50,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565885211] [2019-11-23 20:33:50,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:50,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565885211] [2019-11-23 20:33:50,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845793352] [2019-11-23 20:33:50,362 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 20:33:50,401 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:50,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:50,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:33:50,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:50,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:50,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-23 20:33:50,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189149638] [2019-11-23 20:33:50,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:33:50,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:50,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:33:50,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:33:50,412 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-11-23 20:33:50,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:50,430 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2019-11-23 20:33:50,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:33:50,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-11-23 20:33:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:50,432 INFO L225 Difference]: With dead ends: 22 [2019-11-23 20:33:50,432 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:33:50,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:33:50,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:33:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:33:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:33:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-23 20:33:50,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-11-23 20:33:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:50,437 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-23 20:33:50,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:33:50,438 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-23 20:33:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:33:50,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:50,450 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:50,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:50,656 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:50,657 INFO L82 PathProgramCache]: Analyzing trace with hash -968764341, now seen corresponding path program 5 times [2019-11-23 20:33:50,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:50,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648141799] [2019-11-23 20:33:50,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:50,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648141799] [2019-11-23 20:33:50,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108755624] [2019-11-23 20:33:50,738 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 20:33:50,780 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:33:50,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:50,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:33:50,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:50,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:50,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-23 20:33:50,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417237223] [2019-11-23 20:33:50,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:33:50,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:50,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:33:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:33:50,802 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-11-23 20:33:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:50,840 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-23 20:33:50,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:33:50,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-23 20:33:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:50,842 INFO L225 Difference]: With dead ends: 23 [2019-11-23 20:33:50,842 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:33:50,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:33:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:33:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:33:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:33:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-23 20:33:50,848 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-11-23 20:33:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:50,849 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-23 20:33:50,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:33:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-23 20:33:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:33:50,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:50,850 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:51,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:51,051 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash 84552432, now seen corresponding path program 6 times [2019-11-23 20:33:51,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:51,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347759554] [2019-11-23 20:33:51,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:51,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347759554] [2019-11-23 20:33:51,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957887447] [2019-11-23 20:33:51,166 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 20:33:51,228 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:33:51,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:51,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:33:51,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:51,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:51,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-23 20:33:51,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614879410] [2019-11-23 20:33:51,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:33:51,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:33:51,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:33:51,242 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2019-11-23 20:33:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:51,261 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-23 20:33:51,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:33:51,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-11-23 20:33:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:51,264 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:33:51,264 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:33:51,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:33:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:33:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:33:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:33:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-23 20:33:51,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2019-11-23 20:33:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:51,268 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-23 20:33:51,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:33:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-23 20:33:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:33:51,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:51,269 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:51,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:51,470 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1622365973, now seen corresponding path program 7 times [2019-11-23 20:33:51,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:51,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993990700] [2019-11-23 20:33:51,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:51,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993990700] [2019-11-23 20:33:51,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760420431] [2019-11-23 20:33:51,585 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 20:33:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:51,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:33:51,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:51,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:51,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-23 20:33:51,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518816647] [2019-11-23 20:33:51,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:33:51,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:33:51,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:33:51,629 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-23 20:33:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:51,668 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-11-23 20:33:51,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:33:51,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-11-23 20:33:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:51,672 INFO L225 Difference]: With dead ends: 25 [2019-11-23 20:33:51,672 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:33:51,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:33:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:33:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 20:33:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:33:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-23 20:33:51,680 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-11-23 20:33:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:51,682 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-23 20:33:51,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:33:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-23 20:33:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:33:51,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:51,683 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:51,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:51,886 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1297738320, now seen corresponding path program 8 times [2019-11-23 20:33:51,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:51,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394891813] [2019-11-23 20:33:51,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:51,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394891813] [2019-11-23 20:33:51,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570502453] [2019-11-23 20:33:51,983 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 20:33:52,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:52,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:52,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:33:52,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:52,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:52,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-11-23 20:33:52,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126285659] [2019-11-23 20:33:52,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:33:52,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:52,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:33:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:52,031 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 11 states. [2019-11-23 20:33:52,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:52,061 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-23 20:33:52,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:33:52,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-11-23 20:33:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:52,062 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:33:52,062 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:33:52,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:33:52,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 20:33:52,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:33:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-11-23 20:33:52,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2019-11-23 20:33:52,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:52,067 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-11-23 20:33:52,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:33:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-11-23 20:33:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:33:52,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:52,068 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:52,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:52,272 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1626658187, now seen corresponding path program 9 times [2019-11-23 20:33:52,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:52,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293256723] [2019-11-23 20:33:52,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:52,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293256723] [2019-11-23 20:33:52,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560182066] [2019-11-23 20:33:52,409 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 20:33:52,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:33:52,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:52,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:33:52,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:52,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:52,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-11-23 20:33:52,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291447045] [2019-11-23 20:33:52,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:33:52,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:33:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:33:52,490 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2019-11-23 20:33:52,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:52,520 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-23 20:33:52,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:33:52,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-11-23 20:33:52,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:52,522 INFO L225 Difference]: With dead ends: 27 [2019-11-23 20:33:52,522 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:33:52,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:33:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:33:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:33:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:33:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-23 20:33:52,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-11-23 20:33:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:52,531 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-23 20:33:52,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:33:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-23 20:33:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:33:52,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:52,532 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:52,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:52,733 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 10 times [2019-11-23 20:33:52,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:52,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920736047] [2019-11-23 20:33:52,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:52,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920736047] [2019-11-23 20:33:52,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480372965] [2019-11-23 20:33:52,865 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 20:33:52,909 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:52,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:52,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:33:52,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:52,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:52,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2019-11-23 20:33:52,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686399115] [2019-11-23 20:33:52,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:33:52,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:33:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:33:52,922 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2019-11-23 20:33:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:52,986 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-23 20:33:52,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:33:52,987 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-11-23 20:33:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:52,988 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:33:52,988 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:33:52,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:33:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:33:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:33:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:33:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-23 20:33:52,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2019-11-23 20:33:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:52,994 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-23 20:33:52,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:33:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-23 20:33:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:33:52,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:52,994 INFO L410 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:53,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:53,203 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:53,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1497651755, now seen corresponding path program 11 times [2019-11-23 20:33:53,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:53,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095196633] [2019-11-23 20:33:53,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:53,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095196633] [2019-11-23 20:33:53,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500072252] [2019-11-23 20:33:53,334 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 20:33:53,436 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:33:53,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:53,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:33:53,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:53,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:53,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2019-11-23 20:33:53,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577949541] [2019-11-23 20:33:53,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:33:53,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:33:53,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:33:53,456 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 14 states. [2019-11-23 20:33:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:53,496 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-23 20:33:53,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:33:53,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-11-23 20:33:53,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:53,497 INFO L225 Difference]: With dead ends: 29 [2019-11-23 20:33:53,497 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:33:53,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:33:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:33:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 20:33:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:33:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-23 20:33:53,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2019-11-23 20:33:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:53,507 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-23 20:33:53,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:33:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-23 20:33:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:33:53,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:53,509 INFO L410 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:53,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:53,713 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash -765959920, now seen corresponding path program 12 times [2019-11-23 20:33:53,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:53,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779448781] [2019-11-23 20:33:53,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:53,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779448781] [2019-11-23 20:33:53,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831385159] [2019-11-23 20:33:53,861 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:53,994 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:33:53,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:53,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:33:53,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:54,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:54,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2019-11-23 20:33:54,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430781420] [2019-11-23 20:33:54,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:33:54,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:54,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:33:54,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:33:54,016 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 15 states. [2019-11-23 20:33:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:54,064 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-23 20:33:54,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:33:54,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2019-11-23 20:33:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:54,070 INFO L225 Difference]: With dead ends: 30 [2019-11-23 20:33:54,070 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:33:54,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:33:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:33:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:33:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:33:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-23 20:33:54,074 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2019-11-23 20:33:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:54,074 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-23 20:33:54,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:33:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-23 20:33:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:33:54,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:54,075 INFO L410 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:54,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:54,284 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2076522187, now seen corresponding path program 13 times [2019-11-23 20:33:54,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:54,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267548324] [2019-11-23 20:33:54,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:54,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267548324] [2019-11-23 20:33:54,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607370044] [2019-11-23 20:33:54,455 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:54,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:33:54,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:54,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:54,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2019-11-23 20:33:54,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673531648] [2019-11-23 20:33:54,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:33:54,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:33:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:33:54,501 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 16 states. [2019-11-23 20:33:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:54,540 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-23 20:33:54,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:33:54,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-11-23 20:33:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:54,544 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:33:54,544 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:33:54,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:33:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:33:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 20:33:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:33:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-23 20:33:54,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2019-11-23 20:33:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:54,548 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-23 20:33:54,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:33:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-23 20:33:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:33:54,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:54,549 INFO L410 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:54,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:54,755 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:54,756 INFO L82 PathProgramCache]: Analyzing trace with hash -845712, now seen corresponding path program 14 times [2019-11-23 20:33:54,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:54,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240923668] [2019-11-23 20:33:54,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:54,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240923668] [2019-11-23 20:33:54,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535014508] [2019-11-23 20:33:54,904 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:54,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:54,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:54,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:33:54,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:54,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:54,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2019-11-23 20:33:54,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114689767] [2019-11-23 20:33:54,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:33:54,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:54,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:33:54,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:33:54,960 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 17 states. [2019-11-23 20:33:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:54,991 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-23 20:33:54,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:33:54,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-11-23 20:33:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:54,992 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:33:54,993 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:33:54,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:33:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:33:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 20:33:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:33:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-23 20:33:54,997 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2019-11-23 20:33:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:54,997 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-23 20:33:54,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:33:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-23 20:33:54,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:33:54,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:54,998 INFO L410 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:55,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:55,201 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:55,202 INFO L82 PathProgramCache]: Analyzing trace with hash 25258859, now seen corresponding path program 15 times [2019-11-23 20:33:55,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:55,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434922687] [2019-11-23 20:33:55,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:55,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434922687] [2019-11-23 20:33:55,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24396379] [2019-11-23 20:33:55,388 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:55,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:33:55,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:55,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:33:55,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:55,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:55,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2019-11-23 20:33:55,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686661092] [2019-11-23 20:33:55,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:33:55,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:55,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:33:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:33:55,634 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 18 states. [2019-11-23 20:33:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:55,682 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-23 20:33:55,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:33:55,682 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-11-23 20:33:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:55,683 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:33:55,683 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:33:55,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:33:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:33:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 20:33:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:33:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-23 20:33:55,687 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2019-11-23 20:33:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:55,687 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-23 20:33:55,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:33:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-23 20:33:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:33:55,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:55,688 INFO L410 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:55,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:55,892 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 834500560, now seen corresponding path program 16 times [2019-11-23 20:33:55,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:55,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362207478] [2019-11-23 20:33:55,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:56,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362207478] [2019-11-23 20:33:56,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646589564] [2019-11-23 20:33:56,156 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:56,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:56,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:56,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:33:56,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:56,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:56,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2019-11-23 20:33:56,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621795141] [2019-11-23 20:33:56,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:33:56,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:56,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:33:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:33:56,258 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 19 states. [2019-11-23 20:33:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:56,296 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-23 20:33:56,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:33:56,297 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2019-11-23 20:33:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:56,297 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:33:56,298 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:33:56,300 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:33:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:33:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 20:33:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:33:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-23 20:33:56,305 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2019-11-23 20:33:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:56,306 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-23 20:33:56,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:33:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-23 20:33:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:33:56,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:56,309 INFO L410 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:56,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:56,513 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:56,513 INFO L82 PathProgramCache]: Analyzing trace with hash 151189515, now seen corresponding path program 17 times [2019-11-23 20:33:56,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:56,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262811536] [2019-11-23 20:33:56,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:56,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262811536] [2019-11-23 20:33:56,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876438198] [2019-11-23 20:33:56,739 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:56,961 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:33:56,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:56,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:33:56,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:56,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:56,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2019-11-23 20:33:56,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564475237] [2019-11-23 20:33:56,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:33:56,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:56,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:33:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:33:56,983 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2019-11-23 20:33:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:57,021 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-23 20:33:57,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:33:57,022 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-11-23 20:33:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:57,022 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:33:57,023 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:33:57,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:33:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:33:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:33:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:33:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-23 20:33:57,030 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2019-11-23 20:33:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:57,031 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-23 20:33:57,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:33:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-23 20:33:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:33:57,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:57,031 INFO L410 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:57,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:57,241 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash 443383600, now seen corresponding path program 18 times [2019-11-23 20:33:57,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:57,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125464625] [2019-11-23 20:33:57,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:57,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125464625] [2019-11-23 20:33:57,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128731368] [2019-11-23 20:33:57,513 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:57,906 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:33:57,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:57,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:33:57,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:57,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:57,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2019-11-23 20:33:57,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212329974] [2019-11-23 20:33:57,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:33:57,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:33:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:33:57,933 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 21 states. [2019-11-23 20:33:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:57,969 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-23 20:33:57,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:33:57,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-11-23 20:33:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:57,970 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:33:57,970 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:33:57,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:33:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:33:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 20:33:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:33:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-23 20:33:57,975 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2019-11-23 20:33:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:57,976 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-23 20:33:57,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:33:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-23 20:33:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:33:57,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:57,976 INFO L410 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:58,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:58,181 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:58,182 INFO L82 PathProgramCache]: Analyzing trace with hash 911465643, now seen corresponding path program 19 times [2019-11-23 20:33:58,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:58,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414312905] [2019-11-23 20:33:58,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:58,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414312905] [2019-11-23 20:33:58,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514094921] [2019-11-23 20:33:58,393 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:58,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:33:58,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:58,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:58,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2019-11-23 20:33:58,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115677736] [2019-11-23 20:33:58,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:33:58,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:33:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:33:58,441 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 22 states. [2019-11-23 20:33:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:58,489 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-11-23 20:33:58,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:33:58,489 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-11-23 20:33:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:58,490 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:33:58,490 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:33:58,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:33:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:33:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 20:33:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:33:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-23 20:33:58,494 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2019-11-23 20:33:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:58,495 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-23 20:33:58,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:33:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-23 20:33:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:33:58,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:58,495 INFO L410 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:58,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:58,699 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1757860208, now seen corresponding path program 20 times [2019-11-23 20:33:58,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:58,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455754390] [2019-11-23 20:33:58,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:58,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455754390] [2019-11-23 20:33:58,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023005396] [2019-11-23 20:33:58,932 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:58,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:58,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:58,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:33:58,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:58,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:58,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2019-11-23 20:33:58,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488456255] [2019-11-23 20:33:58,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:33:58,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:58,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:33:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:33:58,981 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states. [2019-11-23 20:33:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:59,030 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-23 20:33:59,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:33:59,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2019-11-23 20:33:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:59,031 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:33:59,031 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:33:59,032 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:33:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:33:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 20:33:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:33:59,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-11-23 20:33:59,037 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2019-11-23 20:33:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:59,038 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-11-23 20:33:59,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:33:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-11-23 20:33:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:33:59,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:59,040 INFO L410 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:59,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:59,241 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:59,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1392384331, now seen corresponding path program 21 times [2019-11-23 20:33:59,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:59,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657975083] [2019-11-23 20:33:59,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:59,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657975083] [2019-11-23 20:33:59,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444790003] [2019-11-23 20:33:59,521 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:00,163 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:34:00,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:00,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:34:00,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:00,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:00,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2019-11-23 20:34:00,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657475447] [2019-11-23 20:34:00,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:34:00,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:00,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:34:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:34:00,178 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 24 states. [2019-11-23 20:34:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:00,232 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-23 20:34:00,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:34:00,234 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2019-11-23 20:34:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:00,234 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:34:00,234 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:34:00,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:34:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:34:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:34:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:34:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-23 20:34:00,239 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2019-11-23 20:34:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:00,239 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-23 20:34:00,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:34:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-23 20:34:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:34:00,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:00,240 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:00,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:00,442 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:00,443 INFO L82 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 22 times [2019-11-23 20:34:00,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:00,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872994949] [2019-11-23 20:34:00,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:00,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872994949] [2019-11-23 20:34:00,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799390414] [2019-11-23 20:34:00,708 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:00,746 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:34:00,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:00,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:34:00,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:00,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:00,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2019-11-23 20:34:00,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866452809] [2019-11-23 20:34:00,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:34:00,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:34:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:34:00,759 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 25 states. [2019-11-23 20:34:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:00,807 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-23 20:34:00,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:34:00,808 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2019-11-23 20:34:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:00,808 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:34:00,808 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:34:00,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:34:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:34:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 20:34:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:34:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-23 20:34:00,813 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2019-11-23 20:34:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:00,813 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-23 20:34:00,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:34:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-23 20:34:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:34:00,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:00,814 INFO L410 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:01,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:01,017 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:01,018 INFO L82 PathProgramCache]: Analyzing trace with hash -301224469, now seen corresponding path program 23 times [2019-11-23 20:34:01,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:01,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261717313] [2019-11-23 20:34:01,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:01,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261717313] [2019-11-23 20:34:01,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989717987] [2019-11-23 20:34:01,337 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:01,795 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 20:34:01,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:01,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:34:01,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:01,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:01,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2019-11-23 20:34:01,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649492004] [2019-11-23 20:34:01,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:34:01,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:01,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:34:01,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:34:01,810 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2019-11-23 20:34:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:01,853 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-23 20:34:01,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:34:01,853 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-11-23 20:34:01,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:01,854 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:34:01,854 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:34:01,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:34:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:34:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 20:34:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:34:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-23 20:34:01,858 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2019-11-23 20:34:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:01,859 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-23 20:34:01,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:34:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-23 20:34:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:34:01,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:01,859 INFO L410 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:02,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:02,064 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash -696548016, now seen corresponding path program 24 times [2019-11-23 20:34:02,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:02,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278172504] [2019-11-23 20:34:02,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:02,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278172504] [2019-11-23 20:34:02,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393049396] [2019-11-23 20:34:02,385 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:03,590 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:34:03,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:03,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:34:03,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:03,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:03,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2019-11-23 20:34:03,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504053055] [2019-11-23 20:34:03,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:34:03,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:34:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:34:03,605 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 27 states. [2019-11-23 20:34:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:03,667 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-23 20:34:03,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:34:03,668 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2019-11-23 20:34:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:03,668 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:34:03,668 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:34:03,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:34:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:34:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 20:34:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:34:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-23 20:34:03,672 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2019-11-23 20:34:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:03,672 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-23 20:34:03,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:34:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-23 20:34:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:34:03,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:03,673 INFO L410 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:03,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:03,878 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:03,878 INFO L82 PathProgramCache]: Analyzing trace with hash -66676085, now seen corresponding path program 25 times [2019-11-23 20:34:03,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:03,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965808113] [2019-11-23 20:34:03,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:04,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965808113] [2019-11-23 20:34:04,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983804227] [2019-11-23 20:34:04,577 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:04,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:34:04,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:04,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:04,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2019-11-23 20:34:04,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416850660] [2019-11-23 20:34:04,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:34:04,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:34:04,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:34:04,629 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 28 states. [2019-11-23 20:34:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:04,678 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-11-23 20:34:04,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:34:04,678 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2019-11-23 20:34:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:04,679 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:34:04,679 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:34:04,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:34:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:34:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:34:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:34:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-23 20:34:04,682 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2019-11-23 20:34:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:04,682 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-23 20:34:04,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:34:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-23 20:34:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:34:04,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:04,683 INFO L410 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:04,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:04,886 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2015482704, now seen corresponding path program 26 times [2019-11-23 20:34:04,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:04,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304246399] [2019-11-23 20:34:04,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:05,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304246399] [2019-11-23 20:34:05,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101290919] [2019-11-23 20:34:05,280 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:05,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:34:05,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:05,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:34:05,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:05,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:05,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2019-11-23 20:34:05,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711650988] [2019-11-23 20:34:05,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:34:05,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:34:05,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:34:05,358 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2019-11-23 20:34:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:05,409 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-23 20:34:05,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:34:05,410 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2019-11-23 20:34:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:05,411 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:34:05,411 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:34:05,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:34:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:34:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-23 20:34:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:34:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-23 20:34:05,419 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2019-11-23 20:34:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:05,419 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-23 20:34:05,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:34:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-23 20:34:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:34:05,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:05,420 INFO L410 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:05,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:05,624 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:05,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1996021547, now seen corresponding path program 27 times [2019-11-23 20:34:05,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:05,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923410216] [2019-11-23 20:34:05,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:05,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923410216] [2019-11-23 20:34:05,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762601809] [2019-11-23 20:34:05,966 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:07,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:34:07,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:07,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:34:07,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:07,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:07,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2019-11-23 20:34:07,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949234085] [2019-11-23 20:34:07,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:34:07,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:34:07,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:34:07,743 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 30 states. [2019-11-23 20:34:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:07,812 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-11-23 20:34:07,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:34:07,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2019-11-23 20:34:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:07,813 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:34:07,813 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:34:07,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:34:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:34:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:34:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:34:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-23 20:34:07,817 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2019-11-23 20:34:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:07,817 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-23 20:34:07,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:34:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-23 20:34:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:34:07,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:07,818 INFO L410 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:08,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:08,019 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1798601744, now seen corresponding path program 28 times [2019-11-23 20:34:08,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:08,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972671393] [2019-11-23 20:34:08,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:08,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972671393] [2019-11-23 20:34:08,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425810108] [2019-11-23 20:34:08,390 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:08,439 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:34:08,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:08,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:34:08,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:08,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:08,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2019-11-23 20:34:08,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104160892] [2019-11-23 20:34:08,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:34:08,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:08,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:34:08,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:34:08,450 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 31 states. [2019-11-23 20:34:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:08,504 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-23 20:34:08,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:34:08,504 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2019-11-23 20:34:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:08,505 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:34:08,505 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:34:08,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:34:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:34:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 20:34:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:34:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-11-23 20:34:08,509 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2019-11-23 20:34:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:08,509 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-11-23 20:34:08,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:34:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-11-23 20:34:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:34:08,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:08,510 INFO L410 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:08,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:08,713 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:08,714 INFO L82 PathProgramCache]: Analyzing trace with hash -26444853, now seen corresponding path program 29 times [2019-11-23 20:34:08,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:08,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297573817] [2019-11-23 20:34:08,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:09,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297573817] [2019-11-23 20:34:09,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228792256] [2019-11-23 20:34:09,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:10,584 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 20:34:10,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:10,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:34:10,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:10,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:10,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2019-11-23 20:34:10,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838377464] [2019-11-23 20:34:10,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:34:10,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:10,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:34:10,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:34:10,603 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 32 states. [2019-11-23 20:34:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:10,664 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-23 20:34:10,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:34:10,664 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2019-11-23 20:34:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:10,665 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:34:10,665 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:34:10,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:34:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:34:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-23 20:34:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:34:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-23 20:34:10,668 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2019-11-23 20:34:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:10,668 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-23 20:34:10,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:34:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-23 20:34:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:34:10,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:10,669 INFO L410 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:10,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:10,874 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash -768314512, now seen corresponding path program 30 times [2019-11-23 20:34:10,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:10,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995800144] [2019-11-23 20:34:10,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:11,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995800144] [2019-11-23 20:34:11,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401717613] [2019-11-23 20:34:11,290 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:13,902 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-23 20:34:13,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:13,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:34:13,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:13,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:13,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2019-11-23 20:34:13,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110219430] [2019-11-23 20:34:13,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:34:13,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:13,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:34:13,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:34:13,917 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 33 states. [2019-11-23 20:34:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:13,971 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-23 20:34:13,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:34:13,971 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2019-11-23 20:34:13,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:13,972 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:34:13,972 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:34:13,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:34:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:34:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 20:34:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:34:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-23 20:34:13,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2019-11-23 20:34:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:13,975 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-23 20:34:13,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:34:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-23 20:34:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:34:13,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:13,976 INFO L410 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:14,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:14,177 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:14,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2003529835, now seen corresponding path program 31 times [2019-11-23 20:34:14,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:14,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812570431] [2019-11-23 20:34:14,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:14,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812570431] [2019-11-23 20:34:14,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011104293] [2019-11-23 20:34:14,648 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:14,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:34:14,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:14,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:14,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2019-11-23 20:34:14,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832673564] [2019-11-23 20:34:14,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:34:14,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:14,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:34:14,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:34:14,706 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 34 states. [2019-11-23 20:34:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:14,771 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2019-11-23 20:34:14,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:34:14,771 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2019-11-23 20:34:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:14,772 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:34:14,772 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:34:14,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:34:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:34:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 20:34:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:34:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-23 20:34:14,775 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2019-11-23 20:34:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:14,775 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-23 20:34:14,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:34:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-23 20:34:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:34:14,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:14,776 INFO L410 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:14,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:14,977 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2031358672, now seen corresponding path program 32 times [2019-11-23 20:34:14,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:14,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974163329] [2019-11-23 20:34:14,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:15,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974163329] [2019-11-23 20:34:15,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272729323] [2019-11-23 20:34:15,684 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:15,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:34:15,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:15,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:34:15,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:15,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:15,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2019-11-23 20:34:15,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436584362] [2019-11-23 20:34:15,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:34:15,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:15,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:34:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:34:15,761 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2019-11-23 20:34:15,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:15,802 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-23 20:34:15,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:34:15,802 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2019-11-23 20:34:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:15,803 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:34:15,803 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:34:15,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:34:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:34:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 20:34:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:34:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-11-23 20:34:15,808 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2019-11-23 20:34:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:15,808 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-11-23 20:34:15,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:34:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-11-23 20:34:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:34:15,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:15,809 INFO L410 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:16,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:16,010 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1400914677, now seen corresponding path program 33 times [2019-11-23 20:34:16,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:16,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128016955] [2019-11-23 20:34:16,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:16,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128016955] [2019-11-23 20:34:16,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734145974] [2019-11-23 20:34:16,488 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:21,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 20:34:21,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:21,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:34:21,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:21,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:21,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2019-11-23 20:34:21,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086987710] [2019-11-23 20:34:21,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:34:21,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:21,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:34:21,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:34:21,295 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 36 states. [2019-11-23 20:34:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:21,342 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-11-23 20:34:21,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:34:21,343 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2019-11-23 20:34:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:21,343 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:34:21,343 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:34:21,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:34:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:34:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:34:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:34:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-23 20:34:21,346 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2019-11-23 20:34:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:21,346 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-23 20:34:21,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:34:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-23 20:34:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:34:21,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:21,346 INFO L410 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:21,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:21,547 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:21,547 INFO L82 PathProgramCache]: Analyzing trace with hash -427206096, now seen corresponding path program 34 times [2019-11-23 20:34:21,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:21,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015620147] [2019-11-23 20:34:21,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:22,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015620147] [2019-11-23 20:34:22,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262588309] [2019-11-23 20:34:22,068 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:22,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:34:22,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:22,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:34:22,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:22,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:22,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2019-11-23 20:34:22,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144666695] [2019-11-23 20:34:22,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:34:22,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:34:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:34:22,128 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 37 states. [2019-11-23 20:34:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:22,189 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-23 20:34:22,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:34:22,190 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2019-11-23 20:34:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:22,190 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:34:22,190 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:34:22,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:34:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:34:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-23 20:34:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:34:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-11-23 20:34:22,194 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2019-11-23 20:34:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:22,194 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-11-23 20:34:22,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:34:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-11-23 20:34:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:34:22,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:22,195 INFO L410 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:22,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:22,398 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash -307011157, now seen corresponding path program 35 times [2019-11-23 20:34:22,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:22,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926861151] [2019-11-23 20:34:22,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:22,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926861151] [2019-11-23 20:34:22,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145095247] [2019-11-23 20:34:22,932 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:25,716 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 20:34:25,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:25,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:34:25,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:25,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:25,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2019-11-23 20:34:25,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236157208] [2019-11-23 20:34:25,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:34:25,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:34:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:34:25,734 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 38 states. [2019-11-23 20:34:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:25,792 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-11-23 20:34:25,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:34:25,792 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2019-11-23 20:34:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:25,793 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:34:25,793 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:34:25,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:34:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:34:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-23 20:34:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:34:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-23 20:34:25,797 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2019-11-23 20:34:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:25,797 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-23 20:34:25,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:34:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-23 20:34:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:34:25,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:25,798 INFO L410 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:25,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:25,998 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash -875935344, now seen corresponding path program 36 times [2019-11-23 20:34:25,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:25,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195596169] [2019-11-23 20:34:26,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:26,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195596169] [2019-11-23 20:34:26,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036059458] [2019-11-23 20:34:26,935 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:34,513 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:34:34,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:34,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:34:34,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:34,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:34,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2019-11-23 20:34:34,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42295378] [2019-11-23 20:34:34,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:34:34,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:34:34,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:34:34,533 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 39 states. [2019-11-23 20:34:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:34,643 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-23 20:34:34,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:34:34,643 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2019-11-23 20:34:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:34,644 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:34:34,644 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:34:34,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:34:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:34:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 20:34:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:34:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-23 20:34:34,647 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2019-11-23 20:34:34,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:34,647 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-23 20:34:34,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:34:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-23 20:34:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:34:34,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:34,648 INFO L410 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:34,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:34,857 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1332715957, now seen corresponding path program 37 times [2019-11-23 20:34:34,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:34,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255790443] [2019-11-23 20:34:34,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:35,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255790443] [2019-11-23 20:34:35,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449567646] [2019-11-23 20:34:35,752 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:35,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:34:35,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:35,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:35,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2019-11-23 20:34:35,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59911565] [2019-11-23 20:34:35,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:34:35,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:35,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:34:35,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:34:35,812 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 40 states. [2019-11-23 20:34:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:35,894 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2019-11-23 20:34:35,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:34:35,894 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2019-11-23 20:34:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:35,895 INFO L225 Difference]: With dead ends: 55 [2019-11-23 20:34:35,895 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:34:35,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:34:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:34:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:34:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:34:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-23 20:34:35,898 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2019-11-23 20:34:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:35,898 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-23 20:34:35,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:34:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-23 20:34:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:34:35,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:35,899 INFO L410 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:36,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:36,102 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1686954224, now seen corresponding path program 38 times [2019-11-23 20:34:36,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:36,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232102949] [2019-11-23 20:34:36,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:36,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232102949] [2019-11-23 20:34:36,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588021550] [2019-11-23 20:34:36,717 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:36,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:34:36,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:36,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:34:36,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:36,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:36,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2019-11-23 20:34:36,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949681816] [2019-11-23 20:34:36,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:34:36,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:36,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:34:36,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:34:36,780 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 41 states. [2019-11-23 20:34:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:36,850 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-23 20:34:36,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:34:36,850 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2019-11-23 20:34:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:36,850 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:34:36,850 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:34:36,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:34:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:34:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-23 20:34:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:34:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-11-23 20:34:36,853 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2019-11-23 20:34:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:36,853 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-11-23 20:34:36,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:34:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-11-23 20:34:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:34:36,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:36,854 INFO L410 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:37,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:37,058 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:37,058 INFO L82 PathProgramCache]: Analyzing trace with hash 807449323, now seen corresponding path program 39 times [2019-11-23 20:34:37,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:37,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381174215] [2019-11-23 20:34:37,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:37,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381174215] [2019-11-23 20:34:37,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487816102] [2019-11-23 20:34:37,683 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:46,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 20:34:46,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:46,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:34:46,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:46,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:46,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2019-11-23 20:34:46,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827959309] [2019-11-23 20:34:46,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:34:46,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:46,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:34:46,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:34:46,025 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 42 states. [2019-11-23 20:34:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:46,076 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-11-23 20:34:46,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:34:46,077 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2019-11-23 20:34:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:46,077 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:34:46,077 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:34:46,078 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:34:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:34:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:34:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:34:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-23 20:34:46,080 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2019-11-23 20:34:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:46,080 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-23 20:34:46,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:34:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-23 20:34:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:34:46,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:46,081 INFO L410 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:46,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:46,288 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:46,289 INFO L82 PathProgramCache]: Analyzing trace with hash -687398832, now seen corresponding path program 40 times [2019-11-23 20:34:46,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:46,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139906790] [2019-11-23 20:34:46,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:46,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139906790] [2019-11-23 20:34:46,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675520598] [2019-11-23 20:34:46,981 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:47,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:34:47,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:47,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:34:47,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:47,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:47,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2019-11-23 20:34:47,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757184417] [2019-11-23 20:34:47,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:34:47,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:47,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:34:47,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:34:47,048 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 43 states. [2019-11-23 20:34:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:47,133 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-23 20:34:47,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:34:47,133 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2019-11-23 20:34:47,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:47,134 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:34:47,134 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:34:47,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:34:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:34:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-23 20:34:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:34:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-11-23 20:34:47,137 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2019-11-23 20:34:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:47,138 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-11-23 20:34:47,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:34:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-11-23 20:34:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:34:47,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:47,138 INFO L410 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:47,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:47,342 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:47,342 INFO L82 PathProgramCache]: Analyzing trace with hash 216948619, now seen corresponding path program 41 times [2019-11-23 20:34:47,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:47,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834225171] [2019-11-23 20:34:47,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:48,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834225171] [2019-11-23 20:34:48,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666051896] [2019-11-23 20:34:48,286 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:54,161 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-23 20:34:54,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:54,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:34:54,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:54,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:54,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2019-11-23 20:34:54,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473045595] [2019-11-23 20:34:54,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:34:54,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:54,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:34:54,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:34:54,178 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 44 states. [2019-11-23 20:34:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:54,263 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-23 20:34:54,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:34:54,264 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2019-11-23 20:34:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:54,264 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:34:54,264 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:34:54,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:34:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:34:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-23 20:34:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:34:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-23 20:34:54,268 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2019-11-23 20:34:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:54,268 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-23 20:34:54,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:34:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-23 20:34:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:34:54,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:54,269 INFO L410 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:54,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:54,476 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1813051472, now seen corresponding path program 42 times [2019-11-23 20:34:54,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:54,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250175661] [2019-11-23 20:34:54,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:34:55,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250175661] [2019-11-23 20:34:55,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639517554] [2019-11-23 20:34:55,212 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:03,816 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-11-23 20:35:03,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:03,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 20:35:03,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:03,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:03,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2019-11-23 20:35:03,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368674960] [2019-11-23 20:35:03,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:35:03,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:03,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:35:03,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:35:03,837 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 45 states. [2019-11-23 20:35:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:03,922 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-23 20:35:03,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:35:03,922 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 49 [2019-11-23 20:35:03,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:03,923 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:35:03,923 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:35:03,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:35:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:35:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 20:35:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:35:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-23 20:35:03,926 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2019-11-23 20:35:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:03,927 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-23 20:35:03,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:35:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-23 20:35:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:35:03,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:03,928 INFO L410 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:04,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,128 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash -318544853, now seen corresponding path program 43 times [2019-11-23 20:35:04,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:04,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177595264] [2019-11-23 20:35:04,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:04,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177595264] [2019-11-23 20:35:04,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223031577] [2019-11-23 20:35:04,897 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:04,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:35:04,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:04,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:04,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2019-11-23 20:35:04,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088146372] [2019-11-23 20:35:04,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:35:04,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:04,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:35:04,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:35:04,974 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 46 states. [2019-11-23 20:35:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:05,018 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-23 20:35:05,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:35:05,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 50 [2019-11-23 20:35:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:05,019 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:35:05,019 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:35:05,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:35:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:35:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 20:35:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:35:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-11-23 20:35:05,023 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2019-11-23 20:35:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:05,023 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-11-23 20:35:05,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:35:05,023 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-11-23 20:35:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:35:05,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:05,024 INFO L410 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:05,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:05,228 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1233479920, now seen corresponding path program 44 times [2019-11-23 20:35:05,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:05,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126420067] [2019-11-23 20:35:05,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:06,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126420067] [2019-11-23 20:35:06,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753468194] [2019-11-23 20:35:06,126 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:06,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:06,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:06,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-23 20:35:06,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:06,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:06,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2019-11-23 20:35:06,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74931443] [2019-11-23 20:35:06,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:35:06,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:06,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:35:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:35:06,197 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2019-11-23 20:35:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:06,259 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2019-11-23 20:35:06,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:35:06,259 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 51 [2019-11-23 20:35:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:06,260 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:35:06,260 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:35:06,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:35:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:35:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-23 20:35:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:35:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2019-11-23 20:35:06,264 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2019-11-23 20:35:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:06,265 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2019-11-23 20:35:06,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:35:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2019-11-23 20:35:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:35:06,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:06,265 INFO L410 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:06,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:06,469 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:06,469 INFO L82 PathProgramCache]: Analyzing trace with hash 468304075, now seen corresponding path program 45 times [2019-11-23 20:35:06,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:06,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767769566] [2019-11-23 20:35:06,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:07,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767769566] [2019-11-23 20:35:07,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370176566] [2019-11-23 20:35:07,410 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:23,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-11-23 20:35:23,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:23,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 20:35:23,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:23,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:23,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2019-11-23 20:35:23,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774255400] [2019-11-23 20:35:23,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:35:23,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:23,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:35:23,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:35:23,887 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 48 states. [2019-11-23 20:35:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:23,973 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2019-11-23 20:35:23,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:35:23,973 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2019-11-23 20:35:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:23,974 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:35:23,974 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:35:23,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:35:23,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:35:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:35:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:35:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-23 20:35:23,977 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2019-11-23 20:35:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:23,978 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-23 20:35:23,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:35:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-23 20:35:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:35:23,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:23,978 INFO L410 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:24,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:24,179 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:24,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1684000368, now seen corresponding path program 46 times [2019-11-23 20:35:24,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:24,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653234054] [2019-11-23 20:35:24,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:25,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653234054] [2019-11-23 20:35:25,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382232447] [2019-11-23 20:35:25,122 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,182 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:25,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:25,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-23 20:35:25,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:25,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:25,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2019-11-23 20:35:25,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062747397] [2019-11-23 20:35:25,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:35:25,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:35:25,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:35:25,198 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 49 states. [2019-11-23 20:35:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:25,267 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2019-11-23 20:35:25,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:35:25,267 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 53 [2019-11-23 20:35:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:25,268 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:35:25,268 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:35:25,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:35:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:35:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-23 20:35:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:35:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-11-23 20:35:25,271 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2019-11-23 20:35:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:25,271 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-11-23 20:35:25,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:35:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-11-23 20:35:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:35:25,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:25,271 INFO L410 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:25,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,475 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:25,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:25,476 INFO L82 PathProgramCache]: Analyzing trace with hash 715879787, now seen corresponding path program 47 times [2019-11-23 20:35:25,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:25,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802670715] [2019-11-23 20:35:25,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:26,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802670715] [2019-11-23 20:35:26,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24040348] [2019-11-23 20:35:26,891 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true