/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/reducercommutativity/sum05-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:29:18,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:29:18,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:29:18,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:29:18,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:29:18,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:29:18,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:29:18,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:29:18,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:29:18,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:29:18,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:29:18,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:29:18,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:29:18,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:29:18,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:29:18,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:29:18,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:29:18,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:29:18,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:29:18,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:29:18,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:29:18,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:29:18,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:29:18,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:29:18,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:29:18,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:29:18,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:29:18,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:29:18,538 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 22:29:18,560 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:29:18,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:29:18,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:29:18,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:29:18,563 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:29:18,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:29:18,563 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:29:18,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:29:18,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:29:18,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:29:18,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:29:18,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:29:18,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:29:18,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:29:18,566 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:29:18,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:29:18,566 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:29:18,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:29:18,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:29:18,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:29:18,567 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:29:18,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:29:18,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:29:18,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:29:18,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:29:18,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:29:18,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:29:18,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:29:18,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:29:18,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:29:18,837 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:29:18,856 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:29:18,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:29:18,862 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:29:18,863 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:29:18,864 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum05-2.i [2019-11-23 22:29:18,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50631a2b9/5ecdd4ae3a0a4a8f8610af572b4cd125/FLAG7ea08edca [2019-11-23 22:29:19,378 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:29:19,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum05-2.i [2019-11-23 22:29:19,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50631a2b9/5ecdd4ae3a0a4a8f8610af572b4cd125/FLAG7ea08edca [2019-11-23 22:29:19,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50631a2b9/5ecdd4ae3a0a4a8f8610af572b4cd125 [2019-11-23 22:29:19,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:29:19,805 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:29:19,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:19,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:29:19,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:29:19,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:19" (1/1) ... [2019-11-23 22:29:19,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7954cf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:19, skipping insertion in model container [2019-11-23 22:29:19,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:19" (1/1) ... [2019-11-23 22:29:19,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:29:19,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:29:20,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:20,070 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:29:20,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:20,106 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:29:20,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20 WrapperNode [2019-11-23 22:29:20,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:20,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:20,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:29:20,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:29:20,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:20,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:29:20,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:29:20,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:29:20,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (1/1) ... [2019-11-23 22:29:20,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:29:20,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:29:20,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:29:20,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:29:20,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (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 22:29:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:29:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:29:20,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:29:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:29:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:29:20,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:29:20,675 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:29:20,675 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:29:20,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:20 BoogieIcfgContainer [2019-11-23 22:29:20,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:29:20,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:29:20,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:29:20,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:29:20,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:29:19" (1/3) ... [2019-11-23 22:29:20,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a43cfe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:20, skipping insertion in model container [2019-11-23 22:29:20,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:20" (2/3) ... [2019-11-23 22:29:20,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a43cfe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:20, skipping insertion in model container [2019-11-23 22:29:20,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:20" (3/3) ... [2019-11-23 22:29:20,692 INFO L109 eAbstractionObserver]: Analyzing ICFG sum05-2.i [2019-11-23 22:29:20,703 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:29:20,709 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:29:20,719 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:29:20,739 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:29:20,740 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:29:20,740 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:29:20,740 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:29:20,740 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:29:20,740 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:29:20,740 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:29:20,741 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:29:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:29:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:29:20,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:20,760 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:20,761 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:20,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:29:20,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:20,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325710678] [2019-11-23 22:29:20,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:20,935 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 22:29:20,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325710678] [2019-11-23 22:29:20,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:20,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:20,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161842383] [2019-11-23 22:29:20,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:20,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:20,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:20,955 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:29:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:20,988 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:29:20,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:20,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:29:20,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:20,998 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:29:20,998 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:29:21,001 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 22:29:21,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:29:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:29:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:29:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:29:21,032 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:29:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:21,033 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:29:21,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:29:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:29:21,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:21,035 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:21,035 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:29:21,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:21,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488460444] [2019-11-23 22:29:21,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:29:21,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488460444] [2019-11-23 22:29:21,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:21,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:21,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674447781] [2019-11-23 22:29:21,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:21,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:21,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:21,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:21,106 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:29:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:21,168 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:29:21,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:21,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:29:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:21,169 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:29:21,169 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:29:21,171 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 22:29:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:29:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:29:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:29:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:29:21,177 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:29:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:21,178 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:29:21,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:29:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:29:21,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:21,179 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, 1, 1, 1, 1, 1] [2019-11-23 22:29:21,180 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:29:21,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:21,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57795639] [2019-11-23 22:29:21,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:21,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57795639] [2019-11-23 22:29:21,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:21,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:21,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182048428] [2019-11-23 22:29:21,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:21,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:21,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:21,266 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:29:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:21,286 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:29:21,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:21,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:29:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:21,288 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:29:21,288 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:29:21,289 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 22:29:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:29:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:29:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:29:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:29:21,295 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:29:21,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:21,295 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:29:21,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:29:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:29:21,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:21,297 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:21,297 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:29:21,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:21,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016543560] [2019-11-23 22:29:21,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:21,414 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 22:29:21,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016543560] [2019-11-23 22:29:21,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473159363] [2019-11-23 22:29:21,415 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 22:29:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:21,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:21,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:21,527 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 22:29:21,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:21,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:29:21,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389116932] [2019-11-23 22:29:21,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:29:21,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:29:21,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:29:21,530 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:29:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:21,560 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:29:21,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:29:21,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:29:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:21,562 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:29:21,562 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:29:21,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 22:29:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:29:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:29:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:29:21,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:29:21,569 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:29:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:21,569 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:29:21,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:29:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:29:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:29:21,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:21,571 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:21,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:21,784 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:21,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:29:21,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:21,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344129327] [2019-11-23 22:29:21,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:21,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344129327] [2019-11-23 22:29:21,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057630062] [2019-11-23 22:29:21,863 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 22:29:21,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:21,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:21,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:21,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:22,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:22,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:29:22,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171417590] [2019-11-23 22:29:22,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:29:22,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:29:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:22,006 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:29:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:22,059 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:29:22,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:29:22,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:29:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:22,062 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:29:22,062 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:29:22,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:22,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:29:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:29:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:29:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:29:22,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:29:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:22,069 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:29:22,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:29:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:29:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:29:22,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:22,070 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:22,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:22,274 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:22,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:22,274 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:29:22,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:22,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076327206] [2019-11-23 22:29:22,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:22,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076327206] [2019-11-23 22:29:22,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184823523] [2019-11-23 22:29:22,365 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 22:29:22,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:29:22,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:22,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:22,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:29:22,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:22,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:29:22,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623959335] [2019-11-23 22:29:22,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:29:22,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:29:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:22,464 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:29:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:22,555 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:29:22,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:29:22,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:29:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:22,556 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:29:22,556 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:29:22,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:29:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:29:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:29:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:29:22,574 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:29:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:22,575 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:29:22,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:29:22,575 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:29:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:29:22,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:22,577 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:22,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:22,778 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:22,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:29:22,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:22,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521876375] [2019-11-23 22:29:22,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:29:22,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521876375] [2019-11-23 22:29:22,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443546337] [2019-11-23 22:29:22,874 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 22:29:22,924 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:22,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:22,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:22,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:29:22,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:22,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:29:22,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400672143] [2019-11-23 22:29:22,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:29:22,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:22,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:29:22,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:22,963 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:29:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:23,074 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2019-11-23 22:29:23,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:23,075 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:29:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:23,076 INFO L225 Difference]: With dead ends: 84 [2019-11-23 22:29:23,076 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:29:23,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:29:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-23 22:29:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:29:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:29:23,084 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:29:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:23,084 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:29:23,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:29:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:29:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:29:23,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:23,086 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:23,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:23,294 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:29:23,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:23,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415199798] [2019-11-23 22:29:23,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:29:23,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415199798] [2019-11-23 22:29:23,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472141231] [2019-11-23 22:29:23,420 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 22:29:23,523 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:29:23,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:23,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:23,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:29:23,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:23,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 22:29:23,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142180029] [2019-11-23 22:29:23,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:29:23,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:23,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:29:23,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:29:23,586 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2019-11-23 22:29:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:23,729 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2019-11-23 22:29:23,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:29:23,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-11-23 22:29:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:23,730 INFO L225 Difference]: With dead ends: 91 [2019-11-23 22:29:23,731 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:29:23,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:29:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:29:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:29:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:29:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:29:23,750 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:29:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:23,753 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:29:23,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:29:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:29:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:29:23,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:23,755 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:23,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:23,961 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:23,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1501769716, now seen corresponding path program 6 times [2019-11-23 22:29:23,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:23,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418646950] [2019-11-23 22:29:23,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 22:29:24,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418646950] [2019-11-23 22:29:24,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252171511] [2019-11-23 22:29:24,059 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 22:29:24,155 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 22:29:24,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:24,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:29:24,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 22:29:24,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:24,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:29:24,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986910843] [2019-11-23 22:29:24,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:29:24,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:29:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:24,190 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 8 states. [2019-11-23 22:29:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:24,275 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2019-11-23 22:29:24,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:29:24,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2019-11-23 22:29:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:24,277 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:29:24,277 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:29:24,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 22:29:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:29:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-23 22:29:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:29:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 22:29:24,285 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 57 [2019-11-23 22:29:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:24,285 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 22:29:24,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:29:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 22:29:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:29:24,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:24,286 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:24,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:24,490 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:24,491 INFO L82 PathProgramCache]: Analyzing trace with hash -164647158, now seen corresponding path program 7 times [2019-11-23 22:29:24,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:24,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566491912] [2019-11-23 22:29:24,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:24,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566491912] [2019-11-23 22:29:24,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784177701] [2019-11-23 22:29:24,585 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:24,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:24,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:24,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:24,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:29:24,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82156562] [2019-11-23 22:29:24,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:29:24,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:24,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:29:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:24,697 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 7 states. [2019-11-23 22:29:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:24,722 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2019-11-23 22:29:24,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:29:24,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2019-11-23 22:29:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:24,724 INFO L225 Difference]: With dead ends: 83 [2019-11-23 22:29:24,724 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 22:29:24,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 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 22:29:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 22:29:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-23 22:29:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:29:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:29:24,731 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 22:29:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:24,732 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:29:24,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:29:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:29:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:29:24,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:24,733 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:24,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:24,937 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash 975610632, now seen corresponding path program 8 times [2019-11-23 22:29:24,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:24,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683168609] [2019-11-23 22:29:24,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:27,909 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-11-23 22:29:28,277 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 41 [2019-11-23 22:29:28,501 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2019-11-23 22:29:28,676 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2019-11-23 22:29:28,904 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2019-11-23 22:29:29,094 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2019-11-23 22:29:29,438 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2019-11-23 22:29:29,804 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 51 [2019-11-23 22:29:30,173 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2019-11-23 22:29:30,572 WARN L192 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2019-11-23 22:29:31,003 WARN L192 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2019-11-23 22:29:31,488 WARN L192 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2019-11-23 22:29:31,904 WARN L192 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2019-11-23 22:29:32,321 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 69 [2019-11-23 22:29:32,749 WARN L192 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 65 [2019-11-23 22:29:33,193 WARN L192 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 62 [2019-11-23 22:29:33,456 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2019-11-23 22:29:40,067 WARN L192 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2019-11-23 22:29:42,643 WARN L192 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 102 DAG size of output: 59 [2019-11-23 22:29:46,743 WARN L192 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 103 DAG size of output: 57 [2019-11-23 22:29:49,511 WARN L192 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2019-11-23 22:29:56,961 WARN L192 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2019-11-23 22:30:05,578 WARN L192 SmtUtils]: Spent 8.39 s on a formula simplification. DAG size of input: 103 DAG size of output: 56 [2019-11-23 22:30:15,837 WARN L192 SmtUtils]: Spent 7.66 s on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2019-11-23 22:30:30,969 WARN L192 SmtUtils]: Spent 7.83 s on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2019-11-23 22:30:36,744 WARN L192 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2019-11-23 22:30:42,416 WARN L192 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2019-11-23 22:30:47,037 WARN L192 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-11-23 22:30:49,007 WARN L192 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2019-11-23 22:30:53,730 WARN L192 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-11-23 22:31:00,208 WARN L192 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 63 DAG size of output: 52