/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/loop-new/nested-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:12:59,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:12:59,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:12:59,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:12:59,667 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 22:12:59,680 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:12:59,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:12:59,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:12:59,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:12:59,682 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:12:59,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:12:59,683 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:12:59,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:12:59,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:12:59,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:12:59,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:12:59,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:12:59,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:12:59,684 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:12:59,684 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:12:59,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:12:59,684 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:12:59,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:12:59,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:12:59,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:12:59,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:12:59,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:12:59,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:12:59,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:12:59,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:12:59,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:12:59,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:12:59,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:12:59,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:12:59,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:12:59,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:12:59,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:12:59,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:12:59,990 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:12:59,990 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:12:59,991 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/nested-1.i [2019-11-23 22:13:00,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e4ebcf3a/ecf55dd8c1ab46e189eaf86039498fba/FLAG731fb43e1 [2019-11-23 22:13:00,518 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:13:00,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i [2019-11-23 22:13:00,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e4ebcf3a/ecf55dd8c1ab46e189eaf86039498fba/FLAG731fb43e1 [2019-11-23 22:13:00,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e4ebcf3a/ecf55dd8c1ab46e189eaf86039498fba [2019-11-23 22:13:00,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:13:00,953 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:13:00,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:00,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:13:00,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:13:00,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:00" (1/1) ... [2019-11-23 22:13:00,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640971ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:00, skipping insertion in model container [2019-11-23 22:13:00,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:00" (1/1) ... [2019-11-23 22:13:00,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:13:00,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:13:01,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:01,185 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:13:01,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:01,215 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:13:01,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01 WrapperNode [2019-11-23 22:13:01,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:01,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:01,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:13:01,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:13:01,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:01,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:13:01,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:13:01,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:13:01,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (1/1) ... [2019-11-23 22:13:01,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:13:01,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:13:01,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:13:01,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:13:01,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (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 22:13:01,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:13:01,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:13:01,645 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:13:01,646 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 22:13:01,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:01 BoogieIcfgContainer [2019-11-23 22:13:01,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:13:01,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:13:01,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:13:01,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:13:01,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:13:00" (1/3) ... [2019-11-23 22:13:01,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5e15ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:01, skipping insertion in model container [2019-11-23 22:13:01,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:01" (2/3) ... [2019-11-23 22:13:01,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5e15ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:01, skipping insertion in model container [2019-11-23 22:13:01,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:01" (3/3) ... [2019-11-23 22:13:01,657 INFO L109 eAbstractionObserver]: Analyzing ICFG nested-1.i [2019-11-23 22:13:01,669 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:13:01,678 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:13:01,693 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:13:01,737 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:13:01,738 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:13:01,738 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:13:01,738 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:13:01,738 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:13:01,739 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:13:01,739 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:13:01,739 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:13:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 22:13:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:13:01,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:01,764 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:01,764 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:01,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1482176357, now seen corresponding path program 1 times [2019-11-23 22:13:01,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:01,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246940005] [2019-11-23 22:13:01,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:01,962 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 22:13:01,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246940005] [2019-11-23 22:13:01,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:01,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:13:01,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650877074] [2019-11-23 22:13:01,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:01,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:01,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:01,988 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2019-11-23 22:13:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:02,080 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2019-11-23 22:13:02,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:02,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 22:13:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:02,098 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:13:02,098 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:13:02,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:13:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:13:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2019-11-23 22:13:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:13:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 22:13:02,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2019-11-23 22:13:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:02,162 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 22:13:02,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 22:13:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:13:02,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:02,164 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:02,166 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1827763540, now seen corresponding path program 1 times [2019-11-23 22:13:02,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:02,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318636981] [2019-11-23 22:13:02,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:02,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318636981] [2019-11-23 22:13:02,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:02,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:13:02,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572551621] [2019-11-23 22:13:02,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:02,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:02,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:02,251 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2019-11-23 22:13:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:02,291 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-23 22:13:02,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:02,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-23 22:13:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:02,294 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:13:02,294 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:13:02,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:13:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:13:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-23 22:13:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:13:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-23 22:13:02,305 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-23 22:13:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:02,305 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-23 22:13:02,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-23 22:13:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:13:02,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:02,306 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:02,306 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash 321118478, now seen corresponding path program 1 times [2019-11-23 22:13:02,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:02,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413472652] [2019-11-23 22:13:02,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:02,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413472652] [2019-11-23 22:13:02,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9230063] [2019-11-23 22:13:02,426 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 22:13:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:02,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:13:02,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:02,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:02,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 22:13:02,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517234555] [2019-11-23 22:13:02,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:13:02,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:02,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:13:02,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:13:02,567 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 11 states. [2019-11-23 22:13:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:02,828 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-11-23 22:13:02,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:13:02,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2019-11-23 22:13:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:02,830 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:13:02,831 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:13:02,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:13:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:13:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2019-11-23 22:13:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:13:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-23 22:13:02,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2019-11-23 22:13:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:02,843 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-23 22:13:02,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:13:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-23 22:13:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:13:02,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:02,846 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:03,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:03,056 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash -482531600, now seen corresponding path program 2 times [2019-11-23 22:13:03,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:03,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300895789] [2019-11-23 22:13:03,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:03,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300895789] [2019-11-23 22:13:03,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085600389] [2019-11-23 22:13:03,185 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 22:13:03,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:03,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:03,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:13:03,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:03,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:03,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 22:13:03,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117421492] [2019-11-23 22:13:03,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:13:03,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:13:03,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:13:03,323 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2019-11-23 22:13:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:03,591 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:13:03,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:13:03,591 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-11-23 22:13:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:03,592 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:13:03,592 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:13:03,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:13:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:13:03,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-11-23 22:13:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:13:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-23 22:13:03,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2019-11-23 22:13:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:03,610 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-23 22:13:03,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:13:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-23 22:13:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:13:03,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:03,611 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:03,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:03,812 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash 303856722, now seen corresponding path program 3 times [2019-11-23 22:13:03,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:03,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436991376] [2019-11-23 22:13:03,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:03,910 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 22:13:03,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436991376] [2019-11-23 22:13:03,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575182540] [2019-11-23 22:13:03,911 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 22:13:03,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:13:03,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:03,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:13:03,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:13:03,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:03,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2019-11-23 22:13:03,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379457990] [2019-11-23 22:13:03,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:13:03,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:03,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:13:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:13:03,985 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2019-11-23 22:13:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:04,219 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-11-23 22:13:04,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:13:04,220 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-11-23 22:13:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:04,221 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:13:04,221 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:13:04,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:13:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:13:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2019-11-23 22:13:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:13:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 22:13:04,230 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2019-11-23 22:13:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:04,231 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 22:13:04,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:13:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 22:13:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:13:04,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:04,232 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:04,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:04,442 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:04,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:04,443 INFO L82 PathProgramCache]: Analyzing trace with hash 616629883, now seen corresponding path program 4 times [2019-11-23 22:13:04,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:04,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096969219] [2019-11-23 22:13:04,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:04,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096969219] [2019-11-23 22:13:04,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491083313] [2019-11-23 22:13:04,682 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 22:13:04,730 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:04,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:04,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:13:04,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 22:13:04,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:04,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2019-11-23 22:13:04,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729405233] [2019-11-23 22:13:04,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:13:04,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:04,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:13:04,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:13:04,877 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 21 states. [2019-11-23 22:13:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:05,272 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-23 22:13:05,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:13:05,272 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-11-23 22:13:05,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:05,273 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:13:05,273 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:13:05,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:13:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:13:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-23 22:13:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:13:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-23 22:13:05,281 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-11-23 22:13:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:05,281 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-23 22:13:05,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:13:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-23 22:13:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:13:05,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:05,282 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:05,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:05,486 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1350606587, now seen corresponding path program 5 times [2019-11-23 22:13:05,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:05,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971636909] [2019-11-23 22:13:05,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:05,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971636909] [2019-11-23 22:13:05,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819234370] [2019-11-23 22:13:05,739 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 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 22:13:05,781 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 22:13:05,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:05,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:13:05,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:13:05,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:05,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 22:13:05,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385503153] [2019-11-23 22:13:05,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:13:05,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:05,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:13:05,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:13:05,921 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 24 states. [2019-11-23 22:13:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:06,408 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2019-11-23 22:13:06,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:13:06,409 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2019-11-23 22:13:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:06,409 INFO L225 Difference]: With dead ends: 53 [2019-11-23 22:13:06,410 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:13:06,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:13:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:13:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:13:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:13:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-23 22:13:06,418 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-11-23 22:13:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:06,419 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-23 22:13:06,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:13:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-23 22:13:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:13:06,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:06,420 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:06,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:06,623 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:06,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2001729659, now seen corresponding path program 6 times [2019-11-23 22:13:06,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:06,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431997289] [2019-11-23 22:13:06,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:06,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431997289] [2019-11-23 22:13:06,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798789615] [2019-11-23 22:13:06,912 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 22:13:06,937 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 22:13:06,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:06,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:13:06,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 22:13:07,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:07,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 23 [2019-11-23 22:13:07,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505015930] [2019-11-23 22:13:07,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:13:07,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:07,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:13:07,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:13:07,010 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2019-11-23 22:13:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:07,864 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2019-11-23 22:13:07,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:13:07,864 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2019-11-23 22:13:07,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:07,865 INFO L225 Difference]: With dead ends: 97 [2019-11-23 22:13:07,865 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 22:13:07,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=1839, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:13:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 22:13:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 47. [2019-11-23 22:13:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:13:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-23 22:13:07,877 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 33 [2019-11-23 22:13:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:07,878 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-23 22:13:07,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:13:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-23 22:13:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:13:07,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:07,879 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:08,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:08,083 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1669697098, now seen corresponding path program 7 times [2019-11-23 22:13:08,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:08,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869465356] [2019-11-23 22:13:08,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:08,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869465356] [2019-11-23 22:13:08,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243391865] [2019-11-23 22:13:08,463 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 22:13:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:08,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:13:08,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 125 proven. 25 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 22:13:08,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:08,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2019-11-23 22:13:08,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964100956] [2019-11-23 22:13:08,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:13:08,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:08,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:13:08,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:13:08,736 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 35 states. [2019-11-23 22:13:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:09,370 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2019-11-23 22:13:09,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:13:09,371 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2019-11-23 22:13:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:09,372 INFO L225 Difference]: With dead ends: 88 [2019-11-23 22:13:09,372 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:13:09,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:13:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:13:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-11-23 22:13:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:13:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2019-11-23 22:13:09,383 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2019-11-23 22:13:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:09,384 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2019-11-23 22:13:09,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:13:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2019-11-23 22:13:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:13:09,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:09,385 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:09,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:09,592 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash -859340008, now seen corresponding path program 8 times [2019-11-23 22:13:09,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:09,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227058718] [2019-11-23 22:13:09,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:10,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227058718] [2019-11-23 22:13:10,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001584820] [2019-11-23 22:13:10,033 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 22:13:10,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:10,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:10,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:13:10,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 173 proven. 36 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-23 22:13:10,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:10,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2019-11-23 22:13:10,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097512254] [2019-11-23 22:13:10,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:13:10,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:10,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:13:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:13:10,283 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 39 states. [2019-11-23 22:13:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:11,008 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-11-23 22:13:11,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:13:11,008 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 52 [2019-11-23 22:13:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:11,009 INFO L225 Difference]: With dead ends: 98 [2019-11-23 22:13:11,009 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:13:11,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:13:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:13:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-11-23 22:13:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:13:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-23 22:13:11,021 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2019-11-23 22:13:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:11,022 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-23 22:13:11,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:13:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-23 22:13:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:13:11,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:11,023 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:11,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:11,227 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:11,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1363821306, now seen corresponding path program 9 times [2019-11-23 22:13:11,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:11,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939886149] [2019-11-23 22:13:11,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:11,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939886149] [2019-11-23 22:13:11,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891937562] [2019-11-23 22:13:11,806 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 22:13:11,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-11-23 22:13:11,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:11,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:13:11,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 231 proven. 49 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2019-11-23 22:13:12,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:12,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-11-23 22:13:12,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721187594] [2019-11-23 22:13:12,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:13:12,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:13:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:13:12,236 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 43 states. [2019-11-23 22:13:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:13,132 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-23 22:13:13,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:13:13,132 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 58 [2019-11-23 22:13:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:13,133 INFO L225 Difference]: With dead ends: 108 [2019-11-23 22:13:13,133 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 22:13:13,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=518, Invalid=3142, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 22:13:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 22:13:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2019-11-23 22:13:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:13:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2019-11-23 22:13:13,148 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2019-11-23 22:13:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:13,148 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2019-11-23 22:13:13,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:13:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2019-11-23 22:13:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:13:13,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:13,152 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:13,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:13,364 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:13,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1890692772, now seen corresponding path program 10 times [2019-11-23 22:13:13,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:13,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086088765] [2019-11-23 22:13:13,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:14,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086088765] [2019-11-23 22:13:14,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969953336] [2019-11-23 22:13:14,009 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 22:13:14,061 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:14,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:14,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:13:14,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 293 proven. 64 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-23 22:13:14,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:14,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2019-11-23 22:13:14,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778577953] [2019-11-23 22:13:14,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 22:13:14,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 22:13:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:13:14,381 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 47 states. [2019-11-23 22:13:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:15,535 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-23 22:13:15,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:13:15,535 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 64 [2019-11-23 22:13:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:15,536 INFO L225 Difference]: With dead ends: 118 [2019-11-23 22:13:15,536 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:13:15,538 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=633, Invalid=3789, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 22:13:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:13:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2019-11-23 22:13:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:13:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2019-11-23 22:13:15,557 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2019-11-23 22:13:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:15,558 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2019-11-23 22:13:15,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 22:13:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2019-11-23 22:13:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:13:15,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:15,561 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:15,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:15,769 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash 612847166, now seen corresponding path program 11 times [2019-11-23 22:13:15,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:15,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218039909] [2019-11-23 22:13:15,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:16,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218039909] [2019-11-23 22:13:16,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281555816] [2019-11-23 22:13:16,459 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 22:13:16,514 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-11-23 22:13:16,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:16,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:13:16,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 549 proven. 81 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-23 22:13:16,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:16,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2019-11-23 22:13:16,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26933415] [2019-11-23 22:13:16,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:13:16,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:16,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:13:16,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:13:16,898 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 51 states. [2019-11-23 22:13:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:18,346 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2019-11-23 22:13:18,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:13:18,346 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 70 [2019-11-23 22:13:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:18,347 INFO L225 Difference]: With dead ends: 128 [2019-11-23 22:13:18,347 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:13:18,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2019-11-23 22:13:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:13:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2019-11-23 22:13:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:13:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2019-11-23 22:13:18,373 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2019-11-23 22:13:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:18,373 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2019-11-23 22:13:18,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:13:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2019-11-23 22:13:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:13:18,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:18,374 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:18,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:18,575 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1324295776, now seen corresponding path program 12 times [2019-11-23 22:13:18,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:18,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236683031] [2019-11-23 22:13:18,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 22:13:18,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236683031] [2019-11-23 22:13:18,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225223315] [2019-11-23 22:13:18,662 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 22:13:18,711 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-11-23 22:13:18,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:18,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:13:18,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 22:13:18,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:18,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2019-11-23 22:13:18,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791192831] [2019-11-23 22:13:18,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:13:18,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:18,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:13:18,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:13:18,764 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 11 states. [2019-11-23 22:13:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:18,815 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2019-11-23 22:13:18,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:13:18,815 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2019-11-23 22:13:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:18,816 INFO L225 Difference]: With dead ends: 126 [2019-11-23 22:13:18,817 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 22:13:18,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:13:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 22:13:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2019-11-23 22:13:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 22:13:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 22:13:18,834 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 76 [2019-11-23 22:13:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:18,836 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 22:13:18,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:13:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 22:13:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 22:13:18,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:18,838 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:19,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:19,041 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:19,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1476420261, now seen corresponding path program 13 times [2019-11-23 22:13:19,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:19,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215025943] [2019-11-23 22:13:19,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:13:19,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215025943] [2019-11-23 22:13:19,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277022548] [2019-11-23 22:13:19,129 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 22:13:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:19,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:13:19,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:13:19,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:19,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2019-11-23 22:13:19,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232150690] [2019-11-23 22:13:19,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:13:19,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:19,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:13:19,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:13:19,269 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 13 states. [2019-11-23 22:13:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:19,315 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2019-11-23 22:13:19,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:13:19,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 99 [2019-11-23 22:13:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:19,317 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:13:19,317 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 22:13:19,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:13:19,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 22:13:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2019-11-23 22:13:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-23 22:13:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2019-11-23 22:13:19,329 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 99 [2019-11-23 22:13:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:19,329 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2019-11-23 22:13:19,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:13:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2019-11-23 22:13:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-23 22:13:19,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:19,331 INFO L410 BasicCegarLoop]: trace histogram [50, 50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:19,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:19,534 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash 172545856, now seen corresponding path program 14 times [2019-11-23 22:13:19,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:19,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891996876] [2019-11-23 22:13:19,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-11-23 22:13:19,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891996876] [2019-11-23 22:13:19,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556115340] [2019-11-23 22:13:19,690 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 22:13:19,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:19,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:19,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:13:19,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-11-23 22:13:19,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:19,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2019-11-23 22:13:19,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458476953] [2019-11-23 22:13:19,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:13:19,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:13:19,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:13:19,933 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand 15 states. [2019-11-23 22:13:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:19,985 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2019-11-23 22:13:19,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:13:19,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2019-11-23 22:13:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:19,990 INFO L225 Difference]: With dead ends: 172 [2019-11-23 22:13:19,990 INFO L226 Difference]: Without dead ends: 168 [2019-11-23 22:13:19,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:13:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-23 22:13:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2019-11-23 22:13:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 22:13:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 152 transitions. [2019-11-23 22:13:20,009 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 152 transitions. Word has length 122 [2019-11-23 22:13:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:20,009 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 152 transitions. [2019-11-23 22:13:20,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:13:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 152 transitions. [2019-11-23 22:13:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 22:13:20,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:20,011 INFO L410 BasicCegarLoop]: trace histogram [60, 60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:20,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:20,224 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:20,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash -334214213, now seen corresponding path program 15 times [2019-11-23 22:13:20,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:20,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528699834] [2019-11-23 22:13:20,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2019-11-23 22:13:20,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528699834] [2019-11-23 22:13:20,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179175425] [2019-11-23 22:13:20,409 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 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 22:13:20,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2019-11-23 22:13:20,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:20,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:13:20,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2019-11-23 22:13:20,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:20,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2019-11-23 22:13:20,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754165686] [2019-11-23 22:13:20,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:13:20,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:20,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:13:20,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:13:20,628 INFO L87 Difference]: Start difference. First operand 146 states and 152 transitions. Second operand 17 states. [2019-11-23 22:13:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:20,688 INFO L93 Difference]: Finished difference Result 195 states and 203 transitions. [2019-11-23 22:13:20,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:13:20,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 145 [2019-11-23 22:13:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:20,690 INFO L225 Difference]: With dead ends: 195 [2019-11-23 22:13:20,690 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 22:13:20,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:13:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 22:13:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 169. [2019-11-23 22:13:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-11-23 22:13:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 176 transitions. [2019-11-23 22:13:20,704 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 176 transitions. Word has length 145 [2019-11-23 22:13:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:20,704 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 176 transitions. [2019-11-23 22:13:20,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:13:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 176 transitions. [2019-11-23 22:13:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 22:13:20,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:20,706 INFO L410 BasicCegarLoop]: trace histogram [70, 70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:20,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:20,910 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash -10093344, now seen corresponding path program 16 times [2019-11-23 22:13:20,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:20,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457422771] [2019-11-23 22:13:20,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2019-11-23 22:13:21,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457422771] [2019-11-23 22:13:21,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867995676] [2019-11-23 22:13:21,121 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 22:13:21,217 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:21,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:21,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:13:21,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2019-11-23 22:13:21,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:21,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-11-23 22:13:21,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999499269] [2019-11-23 22:13:21,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:13:21,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:13:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:13:21,335 INFO L87 Difference]: Start difference. First operand 169 states and 176 transitions. Second operand 19 states. [2019-11-23 22:13:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:21,427 INFO L93 Difference]: Finished difference Result 218 states and 227 transitions. [2019-11-23 22:13:21,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:13:21,427 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 168 [2019-11-23 22:13:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:21,429 INFO L225 Difference]: With dead ends: 218 [2019-11-23 22:13:21,429 INFO L226 Difference]: Without dead ends: 214 [2019-11-23 22:13:21,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:13:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-11-23 22:13:21,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 192. [2019-11-23 22:13:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 22:13:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 200 transitions. [2019-11-23 22:13:21,445 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 200 transitions. Word has length 168 [2019-11-23 22:13:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:21,446 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 200 transitions. [2019-11-23 22:13:21,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:13:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 200 transitions. [2019-11-23 22:13:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 22:13:21,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:21,447 INFO L410 BasicCegarLoop]: trace histogram [80, 80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:21,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:21,651 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:21,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:21,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1089917467, now seen corresponding path program 17 times [2019-11-23 22:13:21,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:21,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381823396] [2019-11-23 22:13:21,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-11-23 22:13:21,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381823396] [2019-11-23 22:13:21,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685995533] [2019-11-23 22:13:21,867 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 22:13:22,138 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2019-11-23 22:13:22,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:22,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:13:22,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-11-23 22:13:22,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:22,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2019-11-23 22:13:22,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121536021] [2019-11-23 22:13:22,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:13:22,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:13:22,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:13:22,411 INFO L87 Difference]: Start difference. First operand 192 states and 200 transitions. Second operand 21 states. [2019-11-23 22:13:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:22,484 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2019-11-23 22:13:22,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:13:22,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 191 [2019-11-23 22:13:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:22,486 INFO L225 Difference]: With dead ends: 241 [2019-11-23 22:13:22,486 INFO L226 Difference]: Without dead ends: 237 [2019-11-23 22:13:22,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:13:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-11-23 22:13:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2019-11-23 22:13:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-11-23 22:13:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 224 transitions. [2019-11-23 22:13:22,507 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 224 transitions. Word has length 191 [2019-11-23 22:13:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:22,507 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 224 transitions. [2019-11-23 22:13:22,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:13:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 224 transitions. [2019-11-23 22:13:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-23 22:13:22,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:22,509 INFO L410 BasicCegarLoop]: trace histogram [90, 90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:22,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:22,713 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:22,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1650308480, now seen corresponding path program 18 times [2019-11-23 22:13:22,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:22,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414835605] [2019-11-23 22:13:22,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 22:13:22,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414835605] [2019-11-23 22:13:22,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670260656] [2019-11-23 22:13:22,987 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 22:13:23,185 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2019-11-23 22:13:23,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:23,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:13:23,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 22:13:23,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:23,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2019-11-23 22:13:23,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345342015] [2019-11-23 22:13:23,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:13:23,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:13:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:13:23,559 INFO L87 Difference]: Start difference. First operand 215 states and 224 transitions. Second operand 23 states. [2019-11-23 22:13:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:23,656 INFO L93 Difference]: Finished difference Result 264 states and 275 transitions. [2019-11-23 22:13:23,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:13:23,657 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 214 [2019-11-23 22:13:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:23,659 INFO L225 Difference]: With dead ends: 264 [2019-11-23 22:13:23,659 INFO L226 Difference]: Without dead ends: 260 [2019-11-23 22:13:23,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:13:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-11-23 22:13:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 238. [2019-11-23 22:13:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-11-23 22:13:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 248 transitions. [2019-11-23 22:13:23,682 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 248 transitions. Word has length 214 [2019-11-23 22:13:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:23,683 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 248 transitions. [2019-11-23 22:13:23,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:13:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 248 transitions. [2019-11-23 22:13:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-23 22:13:23,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:23,684 INFO L410 BasicCegarLoop]: trace histogram [100, 100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:23,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:23,889 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1479356539, now seen corresponding path program 19 times [2019-11-23 22:13:23,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:23,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868288309] [2019-11-23 22:13:23,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 11036 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:13:28,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868288309] [2019-11-23 22:13:28,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:28,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2019-11-23 22:13:28,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114594706] [2019-11-23 22:13:28,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-11-23 22:13:28,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:28,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-11-23 22:13:28,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2019-11-23 22:13:28,029 INFO L87 Difference]: Start difference. First operand 238 states and 248 transitions. Second operand 104 states. [2019-11-23 22:13:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:30,349 INFO L93 Difference]: Finished difference Result 9778 states and 10238 transitions. [2019-11-23 22:13:30,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-11-23 22:13:30,349 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 237 [2019-11-23 22:13:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:30,350 INFO L225 Difference]: With dead ends: 9778 [2019-11-23 22:13:30,350 INFO L226 Difference]: Without dead ends: 0 [2019-11-23 22:13:30,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5359, Invalid=5561, Unknown=0, NotChecked=0, Total=10920 [2019-11-23 22:13:30,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-23 22:13:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-23 22:13:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-23 22:13:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-23 22:13:30,374 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 237 [2019-11-23 22:13:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:30,375 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-23 22:13:30,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-11-23 22:13:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-23 22:13:30,375 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-23 22:13:30,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.