/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:29:27,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:29:27,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:29:27,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:29:27,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:29:27,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:29:27,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:29:27,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:29:27,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:29:27,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:29:27,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:29:27,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:29:27,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:29:27,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:29:27,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:29:27,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:29:27,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:29:27,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:29:27,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:29:27,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:29:27,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:29:27,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:29:27,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:29:27,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:29:27,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:29:27,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:29:27,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:29:27,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:29:27,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:29:27,767 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:29:27,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:29:27,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:29:27,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:29:27,769 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:29:27,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:29:27,770 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:29:27,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:29:27,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:29:27,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:29:27,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:29:27,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:29:27,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:29:27,771 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:29:27,771 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:29:27,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:29:27,771 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:29:27,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:29:27,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:29:27,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:29:27,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:29:27,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:29:27,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:29:27,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:29:27,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:29:27,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:29:27,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:29:27,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:29:27,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:29:27,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:29:28,065 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:29:28,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:29:28,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:29:28,091 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:29:28,091 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:29:28,093 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2019-11-23 20:29:28,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/add9bdc36/963f2d785cdd48f6a3a3154408dcfc07/FLAGa1917c5e8 [2019-11-23 20:29:28,618 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:29:28,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2019-11-23 20:29:28,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/add9bdc36/963f2d785cdd48f6a3a3154408dcfc07/FLAGa1917c5e8 [2019-11-23 20:29:29,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/add9bdc36/963f2d785cdd48f6a3a3154408dcfc07 [2019-11-23 20:29:29,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:29:29,032 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:29:29,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:29,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:29:29,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:29:29,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e90e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29, skipping insertion in model container [2019-11-23 20:29:29,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:29:29,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:29:29,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:29,250 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:29:29,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:29,288 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:29:29,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29 WrapperNode [2019-11-23 20:29:29,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:29,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:29,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:29:29,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:29:29,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:29,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:29:29,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:29:29,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:29:29,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... [2019-11-23 20:29:29,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:29:29,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:29:29,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:29:29,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:29:29,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:29:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:29:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:29:29,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:29:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:29:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:29:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:29:29,798 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:29:29,798 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:29:29,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:29 BoogieIcfgContainer [2019-11-23 20:29:29,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:29:29,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:29:29,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:29:29,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:29:29,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:29:29" (1/3) ... [2019-11-23 20:29:29,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fe5bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:29, skipping insertion in model container [2019-11-23 20:29:29,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:29" (2/3) ... [2019-11-23 20:29:29,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fe5bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:29, skipping insertion in model container [2019-11-23 20:29:29,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:29" (3/3) ... [2019-11-23 20:29:29,810 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2019-11-23 20:29:29,821 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:29:29,828 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:29:29,840 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:29:29,866 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:29:29,867 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:29:29,867 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:29:29,867 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:29:29,867 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:29:29,867 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:29:29,867 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:29:29,868 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:29:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 20:29:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:29:29,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:29,891 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:29,892 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:29,897 INFO L82 PathProgramCache]: Analyzing trace with hash 846254768, now seen corresponding path program 1 times [2019-11-23 20:29:29,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:29,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887465957] [2019-11-23 20:29:29,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:30,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887465957] [2019-11-23 20:29:30,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:29:30,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:29:30,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634955808] [2019-11-23 20:29:30,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:29:30,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:30,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:29:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:29:30,103 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-23 20:29:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:30,253 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2019-11-23 20:29:30,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:29:30,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 20:29:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:30,272 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:29:30,273 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:29:30,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:29:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:29:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:29:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:29:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-23 20:29:30,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2019-11-23 20:29:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:30,322 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-23 20:29:30,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:29:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-23 20:29:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:29:30,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:30,324 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:30,324 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:30,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1299919835, now seen corresponding path program 1 times [2019-11-23 20:29:30,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:30,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005142481] [2019-11-23 20:29:30,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:29:30,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005142481] [2019-11-23 20:29:30,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224204048] [2019-11-23 20:29:30,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:30,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:29:30,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:29:30,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:30,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:29:30,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170465177] [2019-11-23 20:29:30,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:29:30,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:30,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:29:30,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:29:30,528 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2019-11-23 20:29:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:30,612 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2019-11-23 20:29:30,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:29:30,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-23 20:29:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:30,614 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:29:30,614 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:29:30,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:29:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:29:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:29:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:29:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-23 20:29:30,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2019-11-23 20:29:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:30,623 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-23 20:29:30,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:29:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-23 20:29:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:29:30,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:30,624 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:30,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:30,829 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:30,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1276432308, now seen corresponding path program 2 times [2019-11-23 20:29:30,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:30,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650295399] [2019-11-23 20:29:30,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:29:30,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650295399] [2019-11-23 20:29:30,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867359240] [2019-11-23 20:29:30,959 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:31,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:31,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:31,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:29:31,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:29:31,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:31,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:29:31,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027691970] [2019-11-23 20:29:31,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:29:31,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:31,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:29:31,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:31,063 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2019-11-23 20:29:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:31,182 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2019-11-23 20:29:31,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:29:31,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-23 20:29:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:31,186 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:29:31,187 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:29:31,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:29:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 20:29:31,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:29:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-23 20:29:31,201 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2019-11-23 20:29:31,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:31,201 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-23 20:29:31,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:29:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-23 20:29:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:29:31,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:31,204 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:31,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:31,409 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:31,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1067918085, now seen corresponding path program 3 times [2019-11-23 20:29:31,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:31,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417957287] [2019-11-23 20:29:31,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:29:31,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417957287] [2019-11-23 20:29:31,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268947580] [2019-11-23 20:29:31,524 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:31,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:29:31,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:31,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:29:31,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:29:31,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:31,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:29:31,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364084107] [2019-11-23 20:29:31,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:29:31,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:31,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:29:31,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:31,625 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2019-11-23 20:29:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:31,732 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2019-11-23 20:29:31,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:29:31,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-11-23 20:29:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:31,734 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:29:31,734 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:29:31,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:31,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:29:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:29:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:29:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-11-23 20:29:31,747 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 30 [2019-11-23 20:29:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:31,748 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-11-23 20:29:31,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:29:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-11-23 20:29:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:29:31,751 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:31,752 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:31,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:31,953 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:31,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1604238356, now seen corresponding path program 4 times [2019-11-23 20:29:31,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:31,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059104605] [2019-11-23 20:29:31,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:29:32,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059104605] [2019-11-23 20:29:32,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114195579] [2019-11-23 20:29:32,068 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:32,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:32,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:32,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:29:32,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:29:32,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:32,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:29:32,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547559122] [2019-11-23 20:29:32,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:29:32,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:32,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:29:32,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:32,153 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2019-11-23 20:29:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:32,268 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2019-11-23 20:29:32,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:29:32,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-11-23 20:29:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:32,271 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:29:32,271 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:29:32,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:29:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 20:29:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:29:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-11-23 20:29:32,290 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 35 [2019-11-23 20:29:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:32,290 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-11-23 20:29:32,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:29:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-11-23 20:29:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:29:32,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:32,293 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:32,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:32,498 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:32,499 INFO L82 PathProgramCache]: Analyzing trace with hash 313549285, now seen corresponding path program 5 times [2019-11-23 20:29:32,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:32,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226573306] [2019-11-23 20:29:32,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:29:32,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226573306] [2019-11-23 20:29:32,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063373618] [2019-11-23 20:29:32,632 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:33,838 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:29:33,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:33,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:29:33,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:29:33,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:33,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:29:33,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138229217] [2019-11-23 20:29:33,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:29:33,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:33,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:29:33,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:29:33,880 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2019-11-23 20:29:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:33,986 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2019-11-23 20:29:33,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:29:33,987 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2019-11-23 20:29:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:33,988 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:29:33,988 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:29:33,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:29:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:29:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:29:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:29:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-11-23 20:29:33,996 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 40 [2019-11-23 20:29:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:33,996 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-11-23 20:29:33,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:29:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-11-23 20:29:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:29:33,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:33,998 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:34,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:34,204 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash 355512204, now seen corresponding path program 6 times [2019-11-23 20:29:34,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:34,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152143576] [2019-11-23 20:29:34,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:29:34,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152143576] [2019-11-23 20:29:34,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238829449] [2019-11-23 20:29:34,356 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:34,890 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:29:34,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:34,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:29:34,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:29:34,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:34,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:29:34,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584065497] [2019-11-23 20:29:34,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:29:34,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:34,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:29:34,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:29:34,914 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2019-11-23 20:29:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:35,064 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2019-11-23 20:29:35,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:29:35,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-23 20:29:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:35,067 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:29:35,067 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:29:35,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:29:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:29:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 20:29:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:29:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2019-11-23 20:29:35,074 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 45 [2019-11-23 20:29:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:35,075 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2019-11-23 20:29:35,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:29:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2019-11-23 20:29:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:29:35,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:35,076 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:35,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:35,281 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash -215316283, now seen corresponding path program 7 times [2019-11-23 20:29:35,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:35,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633937056] [2019-11-23 20:29:35,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:29:35,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633937056] [2019-11-23 20:29:35,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552010609] [2019-11-23 20:29:35,385 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:35,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:29:35,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:29:35,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:35,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:29:35,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826772328] [2019-11-23 20:29:35,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:29:35,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:35,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:29:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:29:35,472 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 11 states. [2019-11-23 20:29:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:35,581 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2019-11-23 20:29:35,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:29:35,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2019-11-23 20:29:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:35,583 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:29:35,583 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:29:35,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:29:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:29:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:29:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:29:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-11-23 20:29:35,589 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 50 [2019-11-23 20:29:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:35,589 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-11-23 20:29:35,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:29:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-11-23 20:29:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:29:35,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:35,591 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:35,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:35,794 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1821412564, now seen corresponding path program 8 times [2019-11-23 20:29:35,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:35,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750921896] [2019-11-23 20:29:35,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:29:35,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750921896] [2019-11-23 20:29:35,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359551087] [2019-11-23 20:29:35,912 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:35,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:35,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:35,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:29:35,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:29:36,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:36,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:29:36,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396612694] [2019-11-23 20:29:36,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:29:36,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:29:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:29:36,007 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 12 states. [2019-11-23 20:29:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:36,129 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2019-11-23 20:29:36,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:29:36,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-11-23 20:29:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:36,130 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:29:36,130 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:29:36,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:29:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:29:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-23 20:29:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:29:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2019-11-23 20:29:36,138 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 55 [2019-11-23 20:29:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:36,138 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2019-11-23 20:29:36,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:29:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2019-11-23 20:29:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:29:36,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:36,140 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:36,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:36,352 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash 622827429, now seen corresponding path program 9 times [2019-11-23 20:29:36,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:36,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004504542] [2019-11-23 20:29:36,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:29:36,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004504542] [2019-11-23 20:29:36,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956039013] [2019-11-23 20:29:36,519 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:39,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:29:39,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:39,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:29:39,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:29:39,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:39,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:29:39,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090976068] [2019-11-23 20:29:39,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:29:39,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:39,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:29:39,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:29:39,138 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 13 states. [2019-11-23 20:29:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:39,270 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2019-11-23 20:29:39,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:29:39,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2019-11-23 20:29:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:39,271 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:29:39,271 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:29:39,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:29:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:29:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-23 20:29:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:29:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2019-11-23 20:29:39,278 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 60 [2019-11-23 20:29:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:39,278 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2019-11-23 20:29:39,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:29:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2019-11-23 20:29:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:29:39,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:39,282 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:39,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:39,483 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1605603020, now seen corresponding path program 10 times [2019-11-23 20:29:39,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:39,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859277625] [2019-11-23 20:29:39,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-23 20:29:39,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859277625] [2019-11-23 20:29:39,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899259425] [2019-11-23 20:29:39,633 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:39,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:39,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:39,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:29:39,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-23 20:29:39,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:39,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:29:39,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211006647] [2019-11-23 20:29:39,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:29:39,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:39,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:29:39,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:29:39,722 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 14 states. [2019-11-23 20:29:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:39,869 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2019-11-23 20:29:39,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:29:39,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2019-11-23 20:29:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:39,871 INFO L225 Difference]: With dead ends: 128 [2019-11-23 20:29:39,871 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:29:39,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:29:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:29:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-11-23 20:29:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:29:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2019-11-23 20:29:39,880 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 65 [2019-11-23 20:29:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:39,880 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2019-11-23 20:29:39,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:29:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2019-11-23 20:29:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:29:39,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:39,882 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:40,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:40,086 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:40,087 INFO L82 PathProgramCache]: Analyzing trace with hash 152669829, now seen corresponding path program 11 times [2019-11-23 20:29:40,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:40,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980740573] [2019-11-23 20:29:40,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-11-23 20:29:40,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980740573] [2019-11-23 20:29:40,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641898292] [2019-11-23 20:29:40,242 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