/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_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:25:52,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:25:52,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:25:52,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:25:52,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:25:52,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:25:52,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:25:52,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:25:52,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:25:52,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:25:52,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:25:52,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:25:52,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:25:52,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:25:52,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:25:52,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:25:52,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:25:52,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:25:52,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:25:52,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:25:52,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:25:52,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:25:52,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:25:52,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:25:52,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:25:52,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:25:52,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:25:52,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:25:52,435 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 20:25:52,470 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:25:52,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:25:52,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:25:52,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:25:52,471 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:25:52,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:25:52,472 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:25:52,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:25:52,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:25:52,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:25:52,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:25:52,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:25:52,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:25:52,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:25:52,473 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:25:52,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:25:52,474 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:25:52,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:25:52,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:25:52,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:25:52,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:25:52,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:25:52,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:25:52,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:25:52,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:25:52,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:25:52,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:25:52,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:25:52,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:25:52,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:25:52,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:25:52,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:25:52,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:25:52,767 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:25:52,768 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:25:52,769 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2019-11-23 20:25:52,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf1ba40e8/0800838dc3714d00aa95704554088842/FLAG961e30e66 [2019-11-23 20:25:53,286 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:25:53,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2019-11-23 20:25:53,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf1ba40e8/0800838dc3714d00aa95704554088842/FLAG961e30e66 [2019-11-23 20:25:53,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf1ba40e8/0800838dc3714d00aa95704554088842 [2019-11-23 20:25:53,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:25:53,678 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:25:53,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:25:53,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:25:53,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:25:53,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b68018e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53, skipping insertion in model container [2019-11-23 20:25:53,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:25:53,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:25:53,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:25:53,911 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:25:53,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:25:53,956 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:25:53,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53 WrapperNode [2019-11-23 20:25:53,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:25:53,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:25:53,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:25:53,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:25:53,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:25:54,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:25:54,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:25:54,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:25:54,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:54,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:25:54,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:25:54,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:25:54,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:25:54,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (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 20:25:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:25:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:25:54,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:25:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:25:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:25:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:25:54,420 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:25:54,421 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:25:54,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:25:54 BoogieIcfgContainer [2019-11-23 20:25:54,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:25:54,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:25:54,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:25:54,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:25:54,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:25:53" (1/3) ... [2019-11-23 20:25:54,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0fadb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:25:54, skipping insertion in model container [2019-11-23 20:25:54,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (2/3) ... [2019-11-23 20:25:54,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0fadb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:25:54, skipping insertion in model container [2019-11-23 20:25:54,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:25:54" (3/3) ... [2019-11-23 20:25:54,432 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2019-11-23 20:25:54,441 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:25:54,448 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:25:54,472 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:25:54,494 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:25:54,495 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:25:54,495 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:25:54,495 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:25:54,495 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:25:54,495 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:25:54,495 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:25:54,496 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:25:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 20:25:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:25:54,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:54,514 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:54,514 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash -952172836, now seen corresponding path program 1 times [2019-11-23 20:25:54,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:54,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129406751] [2019-11-23 20:25:54,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:54,664 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 20:25:54,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129406751] [2019-11-23 20:25:54,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:25:54,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:25:54,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67679365] [2019-11-23 20:25:54,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:25:54,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:54,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:25:54,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:25:54,691 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-23 20:25:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:54,769 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2019-11-23 20:25:54,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:25:54,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:25:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:54,780 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:25:54,780 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:25:54,784 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 20:25:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:25:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-23 20:25:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:25:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 20:25:54,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2019-11-23 20:25:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:54,817 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 20:25:54,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:25:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 20:25:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:25:54,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:54,819 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:54,819 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:54,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1567052653, now seen corresponding path program 1 times [2019-11-23 20:25:54,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:54,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783440723] [2019-11-23 20:25:54,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:25:54,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783440723] [2019-11-23 20:25:54,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749833237] [2019-11-23 20:25:54,888 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 20:25:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:54,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:25:54,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:25:55,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:55,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:25:55,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031287832] [2019-11-23 20:25:55,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:25:55,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:25:55,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:25:55,009 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2019-11-23 20:25:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:55,077 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-11-23 20:25:55,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:25:55,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:25:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:55,079 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:25:55,079 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:25:55,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 20:25:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:25:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-23 20:25:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:25:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-23 20:25:55,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2019-11-23 20:25:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:55,088 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-23 20:25:55,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:25:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-23 20:25:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:25:55,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:55,089 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:55,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:55,295 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash 159288628, now seen corresponding path program 2 times [2019-11-23 20:25:55,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:55,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056339736] [2019-11-23 20:25:55,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:25:55,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056339736] [2019-11-23 20:25:55,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911492086] [2019-11-23 20:25:55,439 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 20:25:55,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:25:55,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:55,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:25:55,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:25:55,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:55,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:25:55,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138792398] [2019-11-23 20:25:55,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:25:55,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:55,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:25:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:25:55,531 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2019-11-23 20:25:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:55,625 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-11-23 20:25:55,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:25:55,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-23 20:25:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:55,626 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:25:55,626 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:25:55,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 20:25:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:25:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-23 20:25:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:25:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-23 20:25:55,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2019-11-23 20:25:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:55,634 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-23 20:25:55,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:25:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-23 20:25:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:25:55,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:55,636 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:55,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:55,837 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2098372907, now seen corresponding path program 3 times [2019-11-23 20:25:55,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:55,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940726742] [2019-11-23 20:25:55,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:25:55,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940726742] [2019-11-23 20:25:55,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078111449] [2019-11-23 20:25:55,949 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 20:25:56,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:25:56,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:56,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:25:56,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:25:56,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:56,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:25:56,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534159574] [2019-11-23 20:25:56,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:25:56,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:56,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:25:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:25:56,020 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2019-11-23 20:25:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:56,108 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-11-23 20:25:56,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:25:56,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-23 20:25:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:56,114 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:25:56,114 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:25:56,115 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 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 20:25:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:25:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:25:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:25:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-11-23 20:25:56,124 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2019-11-23 20:25:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:56,125 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-11-23 20:25:56,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:25:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-11-23 20:25:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:25:56,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:56,126 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:56,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:56,327 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:56,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1609282676, now seen corresponding path program 4 times [2019-11-23 20:25:56,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:56,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490139317] [2019-11-23 20:25:56,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:25:56,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490139317] [2019-11-23 20:25:56,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795840935] [2019-11-23 20:25:56,463 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 20:25:56,508 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:25:56,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:56,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:25:56,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:25:56,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:56,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:25:56,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389801050] [2019-11-23 20:25:56,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:25:56,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:25:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:25:56,529 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2019-11-23 20:25:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:56,632 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-11-23 20:25:56,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:25:56,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-11-23 20:25:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:56,634 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:25:56,634 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:25:56,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 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 20:25:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:25:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-23 20:25:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:25:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-11-23 20:25:56,649 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2019-11-23 20:25:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:56,651 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-11-23 20:25:56,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:25:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-11-23 20:25:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:25:56,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:56,653 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:56,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:56,854 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1784739267, now seen corresponding path program 5 times [2019-11-23 20:25:56,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:56,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433054799] [2019-11-23 20:25:56,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:25:56,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433054799] [2019-11-23 20:25:56,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877403038] [2019-11-23 20:25:56,972 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 20:25:57,186 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:25:57,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:57,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:25:57,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:25:57,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:57,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:25:57,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525361274] [2019-11-23 20:25:57,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:25:57,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:57,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:25:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:25:57,220 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2019-11-23 20:25:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:57,316 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2019-11-23 20:25:57,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:25:57,318 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-11-23 20:25:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:57,319 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:25:57,319 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:25:57,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 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 20:25:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:25:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-23 20:25:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:25:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-23 20:25:57,332 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2019-11-23 20:25:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:57,332 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-23 20:25:57,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:25:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-23 20:25:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:25:57,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:57,336 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:57,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:57,542 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2008431076, now seen corresponding path program 6 times [2019-11-23 20:25:57,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:57,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674228077] [2019-11-23 20:25:57,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:25:57,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674228077] [2019-11-23 20:25:57,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903239147] [2019-11-23 20:25:57,686 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 20:25:57,948 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:25:57,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:57,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:25:57,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:25:57,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:57,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:25:57,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470882219] [2019-11-23 20:25:57,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:25:57,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:25:57,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:25:57,970 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 10 states. [2019-11-23 20:25:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:58,116 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-11-23 20:25:58,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:25:58,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:25:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:58,117 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:25:58,117 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:25:58,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 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 20:25:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:25:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-23 20:25:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:25:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2019-11-23 20:25:58,124 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2019-11-23 20:25:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:58,125 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2019-11-23 20:25:58,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:25:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2019-11-23 20:25:58,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:25:58,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:58,126 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:58,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:58,331 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:58,331 INFO L82 PathProgramCache]: Analyzing trace with hash -700601765, now seen corresponding path program 7 times [2019-11-23 20:25:58,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:58,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109702265] [2019-11-23 20:25:58,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:25:58,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109702265] [2019-11-23 20:25:58,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558470063] [2019-11-23 20:25:58,437 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 20:25:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:58,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:25:58,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:25:58,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:58,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:25:58,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427797343] [2019-11-23 20:25:58,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:25:58,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:58,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:25:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:58,506 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 11 states. [2019-11-23 20:25:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:58,602 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2019-11-23 20:25:58,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:25:58,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-11-23 20:25:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:58,603 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:25:58,603 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:25:58,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 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 20:25:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:25:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2019-11-23 20:25:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:25:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2019-11-23 20:25:58,610 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2019-11-23 20:25:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:58,611 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2019-11-23 20:25:58,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:25:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2019-11-23 20:25:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:25:58,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:58,612 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:58,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:58,813 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1469732924, now seen corresponding path program 8 times [2019-11-23 20:25:58,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:58,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155764421] [2019-11-23 20:25:58,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:25:58,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155764421] [2019-11-23 20:25:58,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415058799] [2019-11-23 20:25:58,939 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 20:25:59,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:25:59,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:59,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:25:59,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:25:59,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:59,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:25:59,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891554324] [2019-11-23 20:25:59,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:25:59,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:59,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:25:59,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:25:59,026 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 12 states. [2019-11-23 20:25:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:59,140 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2019-11-23 20:25:59,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:25:59,141 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2019-11-23 20:25:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:59,142 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:25:59,143 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:25:59,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 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 20:25:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:25:59,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-11-23 20:25:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:25:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-23 20:25:59,150 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2019-11-23 20:25:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:59,150 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-23 20:25:59,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:25:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-23 20:25:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:25:59,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:59,151 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:59,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:59,363 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:59,364 INFO L82 PathProgramCache]: Analyzing trace with hash 300072691, now seen corresponding path program 9 times [2019-11-23 20:25:59,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:59,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242422057] [2019-11-23 20:25:59,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:25:59,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242422057] [2019-11-23 20:25:59,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444019138] [2019-11-23 20:25:59,512 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 20:25:59,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:25:59,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:59,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:25:59,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:25:59,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:59,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:25:59,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498288658] [2019-11-23 20:25:59,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:25:59,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:25:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:25:59,823 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 13 states. [2019-11-23 20:25:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:59,937 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2019-11-23 20:25:59,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:25:59,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-11-23 20:25:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:59,938 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:25:59,938 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:25:59,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 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 20:25:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:25:59,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-11-23 20:25:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:25:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2019-11-23 20:25:59,947 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2019-11-23 20:25:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:59,947 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2019-11-23 20:25:59,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:25:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2019-11-23 20:25:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:25:59,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:59,948 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:00,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:00,161 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1049188716, now seen corresponding path program 10 times [2019-11-23 20:26:00,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:00,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812135511] [2019-11-23 20:26:00,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:26:00,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812135511] [2019-11-23 20:26:00,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947374829] [2019-11-23 20:26:00,286 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 20:26:00,335 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:00,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:00,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:26:00,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 20:26:00,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:00,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:26:00,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802939597] [2019-11-23 20:26:00,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:26:00,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:26:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:26:00,387 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2019-11-23 20:26:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:00,498 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-11-23 20:26:00,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:26:00,499 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2019-11-23 20:26:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:00,500 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:26:00,500 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:26:00,501 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:26:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:26:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-23 20:26:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:26:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2019-11-23 20:26:00,508 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2019-11-23 20:26:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:00,508 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2019-11-23 20:26:00,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:26:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2019-11-23 20:26:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:26:00,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:00,509 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:00,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:00,714 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:00,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1946825611, now seen corresponding path program 11 times [2019-11-23 20:26:00,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:00,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976096243] [2019-11-23 20:26:00,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-23 20:26:00,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976096243] [2019-11-23 20:26:00,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015973853] [2019-11-23 20:26:00,864 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:32,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:26:32,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:32,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:26:32,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 20:26:32,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:32,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:26:32,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332141700] [2019-11-23 20:26:32,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:26:32,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:26:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:26:32,438 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 15 states. [2019-11-23 20:26:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:32,566 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2019-11-23 20:26:32,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:26:32,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2019-11-23 20:26:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:32,567 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:26:32,567 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:26:32,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:26:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:26:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-11-23 20:26:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:26:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2019-11-23 20:26:32,577 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 66 [2019-11-23 20:26:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:32,577 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2019-11-23 20:26:32,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:26:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2019-11-23 20:26:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:26:32,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:32,579 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:32,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:32,792 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash -780065556, now seen corresponding path program 12 times [2019-11-23 20:26:32,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:32,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716095622] [2019-11-23 20:26:32,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:26:32,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716095622] [2019-11-23 20:26:32,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70129047] [2019-11-23 20:26:32,982 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:47,249 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:26:47,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:47,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:26:47,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:26:47,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:47,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2019-11-23 20:26:47,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17081866] [2019-11-23 20:26:47,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:26:47,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:47,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:26:47,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:26:47,305 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 17 states. [2019-11-23 20:26:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:47,454 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2019-11-23 20:26:47,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:26:47,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2019-11-23 20:26:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:47,456 INFO L225 Difference]: With dead ends: 150 [2019-11-23 20:26:47,456 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:26:47,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:26:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:26:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2019-11-23 20:26:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:26:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2019-11-23 20:26:47,467 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2019-11-23 20:26:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:47,471 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2019-11-23 20:26:47,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:26:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2019-11-23 20:26:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:26:47,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:47,472 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:47,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:47,683 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2028865571, now seen corresponding path program 13 times [2019-11-23 20:26:47,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:47,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193653463] [2019-11-23 20:26:47,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-23 20:26:47,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193653463] [2019-11-23 20:26:47,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839565304] [2019-11-23 20:26:47,848 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:47,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:26:47,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-23 20:26:47,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:47,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:26:47,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860687387] [2019-11-23 20:26:47,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:26:47,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:26:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:26:47,941 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 17 states. [2019-11-23 20:26:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:48,099 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2019-11-23 20:26:48,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:26:48,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2019-11-23 20:26:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:48,102 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:26:48,102 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:26:48,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:26:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:26:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:26:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:26:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2019-11-23 20:26:48,116 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2019-11-23 20:26:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:48,117 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2019-11-23 20:26:48,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:26:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2019-11-23 20:26:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:26:48,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:48,122 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:48,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:48,337 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash 510645060, now seen corresponding path program 14 times [2019-11-23 20:26:48,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:48,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887062519] [2019-11-23 20:26:48,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:26:48,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887062519] [2019-11-23 20:26:48,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074890970] [2019-11-23 20:26:48,535 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:48,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:48,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:48,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:26:48,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:26:48,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:48,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:26:48,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131056158] [2019-11-23 20:26:48,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:26:48,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:48,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:26:48,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:26:48,619 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 18 states. [2019-11-23 20:26:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:48,794 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-23 20:26:48,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:26:48,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-23 20:26:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:48,795 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:26:48,795 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:26:48,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:26:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:26:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-23 20:26:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:26:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2019-11-23 20:26:48,801 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 81 [2019-11-23 20:26:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:48,801 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2019-11-23 20:26:48,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:26:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2019-11-23 20:26:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:26:48,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:48,802 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:49,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:49,003 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash -498582341, now seen corresponding path program 15 times [2019-11-23 20:26:49,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:49,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463459499] [2019-11-23 20:26:49,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-23 20:26:49,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463459499] [2019-11-23 20:26:49,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388637250] [2019-11-23 20:26:49,176 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:51,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:26:51,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:51,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:26:51,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-23 20:26:51,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:51,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:26:51,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869727427] [2019-11-23 20:26:51,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:26:51,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:51,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:26:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:51,514 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 19 states. [2019-11-23 20:26:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:51,663 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2019-11-23 20:26:51,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:26:51,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2019-11-23 20:26:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:51,664 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:26:51,664 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:26:51,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:26:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-11-23 20:26:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:26:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2019-11-23 20:26:51,671 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2019-11-23 20:26:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:51,671 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2019-11-23 20:26:51,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:26:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2019-11-23 20:26:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:26:51,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:51,673 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:51,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:51,878 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1720143460, now seen corresponding path program 16 times [2019-11-23 20:26:51,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:51,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853463328] [2019-11-23 20:26:51,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-11-23 20:26:52,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853463328] [2019-11-23 20:26:52,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835618117] [2019-11-23 20:26:52,106 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:52,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:52,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:52,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:26:52,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:26:52,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:52,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:26:52,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713357676] [2019-11-23 20:26:52,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:26:52,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:52,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:26:52,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:26:52,208 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 20 states. [2019-11-23 20:26:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:52,367 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2019-11-23 20:26:52,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:26:52,367 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2019-11-23 20:26:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:52,368 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:26:52,369 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 20:26:52,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:26:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 20:26:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2019-11-23 20:26:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:26:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2019-11-23 20:26:52,375 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2019-11-23 20:26:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:52,375 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2019-11-23 20:26:52,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:26:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2019-11-23 20:26:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:26:52,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:52,376 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:52,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:52,580 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash -682438317, now seen corresponding path program 17 times [2019-11-23 20:26:52,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:52,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037786605] [2019-11-23 20:26:52,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-11-23 20:26:52,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037786605] [2019-11-23 20:26:52,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625000455] [2019-11-23 20:26:52,779 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true