/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/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:18:28,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:18:28,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:18:28,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:18:28,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:18:28,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:18:28,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:18:28,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:18:28,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:18:28,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:18:28,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:18:28,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:18:28,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:18:28,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:18:28,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:18:28,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:18:28,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:18:28,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:18:28,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:18:28,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:18:28,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:18:28,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:18:28,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:18:28,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:18:28,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:18:28,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:18:28,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:18:28,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:18:28,574 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 20:18:28,607 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:18:28,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:18:28,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:18:28,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:18:28,612 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:18:28,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:18:28,612 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:18:28,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:18:28,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:18:28,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:18:28,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:18:28,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:18:28,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:18:28,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:18:28,617 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:18:28,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:18:28,617 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:18:28,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:18:28,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:18:28,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:18:28,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:18:28,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:18:28,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:18:28,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:18:28,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:18:28,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:18:28,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:18:28,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:18:28,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:18:28,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:18:28,909 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:18:28,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:18:28,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:18:28,933 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:18:28,934 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:18:28,935 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-11-23 20:18:28,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6418108f/d5da37ee62ad4572931f5f8da1fee2f9/FLAG23fac3709 [2019-11-23 20:18:29,440 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:18:29,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-11-23 20:18:29,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6418108f/d5da37ee62ad4572931f5f8da1fee2f9/FLAG23fac3709 [2019-11-23 20:18:29,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6418108f/d5da37ee62ad4572931f5f8da1fee2f9 [2019-11-23 20:18:29,830 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:18:29,832 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:18:29,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:29,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:18:29,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:18:29,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:29" (1/1) ... [2019-11-23 20:18:29,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7ef353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:29, skipping insertion in model container [2019-11-23 20:18:29,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:29" (1/1) ... [2019-11-23 20:18:29,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:18:29,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:18:30,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:30,050 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:18:30,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:30,173 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:18:30,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30 WrapperNode [2019-11-23 20:18:30,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:30,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:30,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:18:30,175 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:18:30,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:30,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:18:30,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:18:30,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:18:30,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (1/1) ... [2019-11-23 20:18:30,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:18:30,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:18:30,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:18:30,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:18:30,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (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 20:18:30,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:18:30,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:18:30,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:18:30,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:18:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:18:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:18:30,696 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:18:30,696 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-23 20:18:30,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:30 BoogieIcfgContainer [2019-11-23 20:18:30,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:18:30,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:18:30,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:18:30,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:18:30,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:18:29" (1/3) ... [2019-11-23 20:18:30,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a91c18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:30, skipping insertion in model container [2019-11-23 20:18:30,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:30" (2/3) ... [2019-11-23 20:18:30,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a91c18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:30, skipping insertion in model container [2019-11-23 20:18:30,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:30" (3/3) ... [2019-11-23 20:18:30,704 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2019-11-23 20:18:30,712 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:18:30,717 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 20:18:30,727 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 20:18:30,747 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:18:30,747 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:18:30,748 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:18:30,748 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:18:30,748 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:18:30,748 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:18:30,748 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:18:30,749 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:18:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-23 20:18:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:18:30,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:30,768 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:30,769 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:30,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash 212109301, now seen corresponding path program 1 times [2019-11-23 20:18:30,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:30,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373401824] [2019-11-23 20:18:30,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:30,941 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 20:18:30,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373401824] [2019-11-23 20:18:30,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:30,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:30,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654607646] [2019-11-23 20:18:30,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:30,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:30,967 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-23 20:18:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:31,065 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2019-11-23 20:18:31,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:31,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:18:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:31,079 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:18:31,079 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:18:31,083 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 20:18:31,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:18:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2019-11-23 20:18:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:18:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:18:31,133 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 8 [2019-11-23 20:18:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:31,133 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:18:31,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:18:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:18:31,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:31,135 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:31,135 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:31,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:31,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1436007159, now seen corresponding path program 1 times [2019-11-23 20:18:31,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:31,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442862458] [2019-11-23 20:18:31,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:31,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442862458] [2019-11-23 20:18:31,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066130780] [2019-11-23 20:18:31,193 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 20:18:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:31,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:31,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:31,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:31,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:18:31,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889854838] [2019-11-23 20:18:31,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:18:31,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:31,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:18:31,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:31,300 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2019-11-23 20:18:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:31,401 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2019-11-23 20:18:31,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:18:31,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-23 20:18:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:31,405 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:18:31,405 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:18:31,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:18:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 38. [2019-11-23 20:18:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:18:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-11-23 20:18:31,421 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2019-11-23 20:18:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:31,421 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-11-23 20:18:31,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:18:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-11-23 20:18:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:18:31,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:31,425 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:31,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:31,633 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:31,634 INFO L82 PathProgramCache]: Analyzing trace with hash 780809593, now seen corresponding path program 2 times [2019-11-23 20:18:31,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:31,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455713122] [2019-11-23 20:18:31,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:31,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455713122] [2019-11-23 20:18:31,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988774861] [2019-11-23 20:18:31,746 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 20:18:31,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:18:31,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:31,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:31,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:18:31,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:18:31,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-23 20:18:31,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052318524] [2019-11-23 20:18:31,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:18:31,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:31,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:18:31,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:18:31,834 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 4 states. [2019-11-23 20:18:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:31,885 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2019-11-23 20:18:31,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:31,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 20:18:31,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:31,887 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:18:31,887 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:18:31,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:18:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:18:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 20:18:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:18:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 20:18:31,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2019-11-23 20:18:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:31,895 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 20:18:31,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:18:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 20:18:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:18:31,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:31,896 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:32,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:32,099 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:32,100 INFO L82 PathProgramCache]: Analyzing trace with hash 27211895, now seen corresponding path program 1 times [2019-11-23 20:18:32,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:32,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332924601] [2019-11-23 20:18:32,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:32,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332924601] [2019-11-23 20:18:32,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:32,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:32,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599132084] [2019-11-23 20:18:32,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:32,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:32,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:32,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:32,172 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-23 20:18:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:32,209 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2019-11-23 20:18:32,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:32,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:18:32,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:32,213 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:18:32,214 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:18:32,214 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 20:18:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:18:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2019-11-23 20:18:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:18:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-23 20:18:32,230 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 25 [2019-11-23 20:18:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:32,230 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-23 20:18:32,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-23 20:18:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:18:32,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:32,231 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:32,232 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:32,232 INFO L82 PathProgramCache]: Analyzing trace with hash 676355061, now seen corresponding path program 1 times [2019-11-23 20:18:32,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:32,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116010400] [2019-11-23 20:18:32,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:32,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116010400] [2019-11-23 20:18:32,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011245064] [2019-11-23 20:18:32,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:32,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:32,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:32,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:32,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:18:32,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840179570] [2019-11-23 20:18:32,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:18:32,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:32,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:18:32,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:32,495 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 10 states. [2019-11-23 20:18:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:32,739 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2019-11-23 20:18:32,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:18:32,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-23 20:18:32,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:32,740 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:18:32,741 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:18:32,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:18:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2019-11-23 20:18:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:18:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2019-11-23 20:18:32,750 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 27 [2019-11-23 20:18:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:32,751 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2019-11-23 20:18:32,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:18:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2019-11-23 20:18:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:18:32,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:32,752 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:32,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:32,964 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:32,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1822113209, now seen corresponding path program 1 times [2019-11-23 20:18:32,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:32,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731256724] [2019-11-23 20:18:32,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:18:33,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731256724] [2019-11-23 20:18:33,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160293608] [2019-11-23 20:18:33,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:33,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:18:33,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:18:33,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:33,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 20:18:33,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424279079] [2019-11-23 20:18:33,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:18:33,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:33,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:18:33,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:33,154 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 10 states. [2019-11-23 20:18:33,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:33,520 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2019-11-23 20:18:33,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:18:33,521 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-11-23 20:18:33,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:33,522 INFO L225 Difference]: With dead ends: 173 [2019-11-23 20:18:33,522 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:18:33,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:18:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:18:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 54. [2019-11-23 20:18:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:18:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2019-11-23 20:18:33,531 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 32 [2019-11-23 20:18:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:33,532 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2019-11-23 20:18:33,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:18:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2019-11-23 20:18:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:18:33,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:33,535 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:33,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:33,736 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:33,736 INFO L82 PathProgramCache]: Analyzing trace with hash -303285431, now seen corresponding path program 2 times [2019-11-23 20:18:33,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:33,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760184624] [2019-11-23 20:18:33,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:18:33,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760184624] [2019-11-23 20:18:33,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715771413] [2019-11-23 20:18:33,856 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 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 20:18:33,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:33,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:33,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:33,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:18:33,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:33,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-11-23 20:18:33,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910122116] [2019-11-23 20:18:33,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:33,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:33,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:33,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:33,994 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 11 states. [2019-11-23 20:18:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:34,413 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2019-11-23 20:18:34,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:18:34,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-11-23 20:18:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:34,415 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:18:34,415 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:18:34,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:18:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:18:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 58. [2019-11-23 20:18:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:18:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2019-11-23 20:18:34,427 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 38 [2019-11-23 20:18:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:34,427 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2019-11-23 20:18:34,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2019-11-23 20:18:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:18:34,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:34,429 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:34,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:34,634 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:34,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:34,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1033073537, now seen corresponding path program 1 times [2019-11-23 20:18:34,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:34,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296967701] [2019-11-23 20:18:34,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:18:34,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296967701] [2019-11-23 20:18:34,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150130081] [2019-11-23 20:18:34,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:34,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:18:34,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:18:34,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:34,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:18:34,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489264129] [2019-11-23 20:18:34,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:18:34,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:34,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:18:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:34,832 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 9 states. [2019-11-23 20:18:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:34,900 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2019-11-23 20:18:34,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:18:34,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2019-11-23 20:18:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:34,902 INFO L225 Difference]: With dead ends: 160 [2019-11-23 20:18:34,902 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:18:34,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:18:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 60. [2019-11-23 20:18:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:18:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-11-23 20:18:34,916 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 40 [2019-11-23 20:18:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:34,917 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-11-23 20:18:34,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:18:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-11-23 20:18:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:18:34,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:34,918 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:35,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:35,122 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash -257286525, now seen corresponding path program 2 times [2019-11-23 20:18:35,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:35,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240280345] [2019-11-23 20:18:35,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:18:35,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240280345] [2019-11-23 20:18:35,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011082785] [2019-11-23 20:18:35,216 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 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 20:18:35,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:35,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:35,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:18:35,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:18:35,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:35,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:18:35,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218060474] [2019-11-23 20:18:35,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:18:35,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:35,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:18:35,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:35,289 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 10 states. [2019-11-23 20:18:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:35,364 INFO L93 Difference]: Finished difference Result 171 states and 204 transitions. [2019-11-23 20:18:35,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:18:35,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-11-23 20:18:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:35,365 INFO L225 Difference]: With dead ends: 171 [2019-11-23 20:18:35,365 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 20:18:35,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 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 20:18:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 20:18:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 62. [2019-11-23 20:18:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:18:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2019-11-23 20:18:35,374 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 42 [2019-11-23 20:18:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:35,375 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2019-11-23 20:18:35,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:18:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2019-11-23 20:18:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:18:35,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:35,376 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:35,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:35,580 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:35,580 INFO L82 PathProgramCache]: Analyzing trace with hash 952242437, now seen corresponding path program 3 times [2019-11-23 20:18:35,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:35,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182070886] [2019-11-23 20:18:35,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:18:35,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182070886] [2019-11-23 20:18:35,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727740596] [2019-11-23 20:18:35,691 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 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 20:18:35,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:18:35,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:35,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:35,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:18:35,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:35,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-11-23 20:18:35,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106324111] [2019-11-23 20:18:35,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:35,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:35,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:35,780 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 12 states. [2019-11-23 20:18:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:35,932 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2019-11-23 20:18:35,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:18:35,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-11-23 20:18:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:35,934 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:18:35,934 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:18:35,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:18:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:18:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 66. [2019-11-23 20:18:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:18:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2019-11-23 20:18:35,945 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 44 [2019-11-23 20:18:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:35,945 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2019-11-23 20:18:35,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2019-11-23 20:18:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:18:35,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:35,946 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:36,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:36,153 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:36,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash -411131319, now seen corresponding path program 4 times [2019-11-23 20:18:36,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:36,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41772508] [2019-11-23 20:18:36,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:36,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41772508] [2019-11-23 20:18:36,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761484951] [2019-11-23 20:18:36,258 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 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 20:18:36,335 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:36,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:36,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:18:36,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:36,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:36,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:18:36,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815842547] [2019-11-23 20:18:36,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:36,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:36,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:36,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:36,393 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 12 states. [2019-11-23 20:18:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:36,531 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2019-11-23 20:18:36,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:18:36,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2019-11-23 20:18:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:36,532 INFO L225 Difference]: With dead ends: 197 [2019-11-23 20:18:36,533 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 20:18:36,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 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 20:18:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 20:18:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 68. [2019-11-23 20:18:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:18:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2019-11-23 20:18:36,552 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 48 [2019-11-23 20:18:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:36,553 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2019-11-23 20:18:36,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2019-11-23 20:18:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:18:36,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:36,559 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:36,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:36,763 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:36,763 INFO L82 PathProgramCache]: Analyzing trace with hash 54733643, now seen corresponding path program 5 times [2019-11-23 20:18:36,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:36,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991172267] [2019-11-23 20:18:36,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:36,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991172267] [2019-11-23 20:18:36,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112972608] [2019-11-23 20:18:36,871 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 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 20:18:37,003 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:18:37,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:37,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:18:37,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:37,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:37,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:18:37,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462395563] [2019-11-23 20:18:37,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:18:37,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:37,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:18:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:37,025 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 13 states. [2019-11-23 20:18:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:37,141 INFO L93 Difference]: Finished difference Result 208 states and 244 transitions. [2019-11-23 20:18:37,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:18:37,142 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-11-23 20:18:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:37,143 INFO L225 Difference]: With dead ends: 208 [2019-11-23 20:18:37,143 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:18:37,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 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 20:18:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:18:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 70. [2019-11-23 20:18:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:18:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2019-11-23 20:18:37,153 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 50 [2019-11-23 20:18:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:37,153 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2019-11-23 20:18:37,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:18:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2019-11-23 20:18:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:18:37,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:37,154 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:37,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:37,358 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:37,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1074363341, now seen corresponding path program 6 times [2019-11-23 20:18:37,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:37,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323963342] [2019-11-23 20:18:37,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:37,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323963342] [2019-11-23 20:18:37,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268384224] [2019-11-23 20:18:37,471 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 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 20:18:37,530 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:18:37,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:37,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:37,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-11-23 20:18:37,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:37,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-23 20:18:37,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269523104] [2019-11-23 20:18:37,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:18:37,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:37,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:18:37,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:37,580 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 16 states. [2019-11-23 20:18:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:37,772 INFO L93 Difference]: Finished difference Result 280 states and 337 transitions. [2019-11-23 20:18:37,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:18:37,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2019-11-23 20:18:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:37,774 INFO L225 Difference]: With dead ends: 280 [2019-11-23 20:18:37,774 INFO L226 Difference]: Without dead ends: 233 [2019-11-23 20:18:37,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:18:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-11-23 20:18:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 94. [2019-11-23 20:18:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:18:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2019-11-23 20:18:37,785 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 52 [2019-11-23 20:18:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:37,786 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2019-11-23 20:18:37,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:18:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2019-11-23 20:18:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:18:37,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:37,787 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:37,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:37,998 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1044828667, now seen corresponding path program 1 times [2019-11-23 20:18:37,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:37,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459819790] [2019-11-23 20:18:37,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-11-23 20:18:38,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459819790] [2019-11-23 20:18:38,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:38,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:18:38,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608129065] [2019-11-23 20:18:38,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:18:38,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:38,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:18:38,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:18:38,044 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 4 states. [2019-11-23 20:18:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:38,063 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2019-11-23 20:18:38,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:18:38,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2019-11-23 20:18:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:38,064 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:18:38,065 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:18:38,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:18:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-23 20:18:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:18:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2019-11-23 20:18:38,081 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 62 [2019-11-23 20:18:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:38,081 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2019-11-23 20:18:38,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:18:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2019-11-23 20:18:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:18:38,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:38,082 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:38,082 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:38,083 INFO L82 PathProgramCache]: Analyzing trace with hash -474305825, now seen corresponding path program 7 times [2019-11-23 20:18:38,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:38,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918373414] [2019-11-23 20:18:38,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:18:38,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918373414] [2019-11-23 20:18:38,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380558012] [2019-11-23 20:18:38,209 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 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 20:18:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:38,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:18:38,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:18:38,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:38,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:18:38,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204407114] [2019-11-23 20:18:38,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:18:38,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:38,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:18:38,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:38,297 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 15 states. [2019-11-23 20:18:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:38,431 INFO L93 Difference]: Finished difference Result 238 states and 270 transitions. [2019-11-23 20:18:38,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:18:38,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-23 20:18:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:38,433 INFO L225 Difference]: With dead ends: 238 [2019-11-23 20:18:38,433 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 20:18:38,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 20:18:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 78. [2019-11-23 20:18:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:18:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2019-11-23 20:18:38,442 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 63 [2019-11-23 20:18:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:38,442 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2019-11-23 20:18:38,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:18:38,442 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2019-11-23 20:18:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:18:38,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:38,443 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:38,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:38,647 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 441892253, now seen corresponding path program 8 times [2019-11-23 20:18:38,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:38,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658538642] [2019-11-23 20:18:38,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:18:38,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658538642] [2019-11-23 20:18:38,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398256622] [2019-11-23 20:18:38,796 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 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 20:18:38,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:38,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:38,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:18:38,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:18:38,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:38,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:18:38,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245190384] [2019-11-23 20:18:38,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:18:38,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:18:38,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:38,894 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 16 states. [2019-11-23 20:18:39,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:39,058 INFO L93 Difference]: Finished difference Result 249 states and 282 transitions. [2019-11-23 20:18:39,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:18:39,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:18:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:39,060 INFO L225 Difference]: With dead ends: 249 [2019-11-23 20:18:39,060 INFO L226 Difference]: Without dead ends: 198 [2019-11-23 20:18:39,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-23 20:18:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 80. [2019-11-23 20:18:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:18:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2019-11-23 20:18:39,068 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 65 [2019-11-23 20:18:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:39,068 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2019-11-23 20:18:39,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:18:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2019-11-23 20:18:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:18:39,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:39,069 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:39,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:39,273 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:39,274 INFO L82 PathProgramCache]: Analyzing trace with hash 439949531, now seen corresponding path program 9 times [2019-11-23 20:18:39,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:39,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071396767] [2019-11-23 20:18:39,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:18:39,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071396767] [2019-11-23 20:18:39,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150344194] [2019-11-23 20:18:39,437 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 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 20:18:39,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:18:39,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:39,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:18:39,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2019-11-23 20:18:39,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:39,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-23 20:18:39,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115481555] [2019-11-23 20:18:39,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:18:39,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:18:39,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:18:39,570 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 20 states. [2019-11-23 20:18:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:39,843 INFO L93 Difference]: Finished difference Result 282 states and 322 transitions. [2019-11-23 20:18:39,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:18:39,843 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2019-11-23 20:18:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:39,845 INFO L225 Difference]: With dead ends: 282 [2019-11-23 20:18:39,845 INFO L226 Difference]: Without dead ends: 231 [2019-11-23 20:18:39,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=338, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-11-23 20:18:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 94. [2019-11-23 20:18:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:18:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2019-11-23 20:18:39,856 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 67 [2019-11-23 20:18:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:39,856 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2019-11-23 20:18:39,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:18:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2019-11-23 20:18:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-23 20:18:39,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:39,857 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:40,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:40,061 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:40,062 INFO L82 PathProgramCache]: Analyzing trace with hash 988321305, now seen corresponding path program 10 times [2019-11-23 20:18:40,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:40,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738576670] [2019-11-23 20:18:40,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 20:18:40,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738576670] [2019-11-23 20:18:40,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838006021] [2019-11-23 20:18:40,254 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 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 20:18:40,348 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:40,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:40,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:40,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 20:18:40,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:40,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2019-11-23 20:18:40,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744747965] [2019-11-23 20:18:40,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:18:40,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:40,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:18:40,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:40,426 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand 22 states. [2019-11-23 20:18:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:40,709 INFO L93 Difference]: Finished difference Result 317 states and 362 transitions. [2019-11-23 20:18:40,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:18:40,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2019-11-23 20:18:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:40,711 INFO L225 Difference]: With dead ends: 317 [2019-11-23 20:18:40,711 INFO L226 Difference]: Without dead ends: 254 [2019-11-23 20:18:40,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=436, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:18:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-11-23 20:18:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 108. [2019-11-23 20:18:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:18:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2019-11-23 20:18:40,723 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 78 [2019-11-23 20:18:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:40,724 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2019-11-23 20:18:40,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:18:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2019-11-23 20:18:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:18:40,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:40,725 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:40,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:40,937 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -921939949, now seen corresponding path program 11 times [2019-11-23 20:18:40,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:40,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772615543] [2019-11-23 20:18:40,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:18:41,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772615543] [2019-11-23 20:18:41,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308433035] [2019-11-23 20:18:41,171 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 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 20:18:44,578 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 20:18:44,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:44,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:18:44,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-11-23 20:18:44,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:44,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:18:44,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683896338] [2019-11-23 20:18:44,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:18:44,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:18:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:44,668 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 24 states. [2019-11-23 20:18:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:44,954 INFO L93 Difference]: Finished difference Result 352 states and 402 transitions. [2019-11-23 20:18:44,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:18:44,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2019-11-23 20:18:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:44,956 INFO L225 Difference]: With dead ends: 352 [2019-11-23 20:18:44,956 INFO L226 Difference]: Without dead ends: 277 [2019-11-23 20:18:44,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:18:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-11-23 20:18:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 122. [2019-11-23 20:18:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 20:18:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2019-11-23 20:18:44,967 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 89 [2019-11-23 20:18:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:44,968 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2019-11-23 20:18:44,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:18:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2019-11-23 20:18:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 20:18:44,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:44,969 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:45,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:45,171 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1384946463, now seen corresponding path program 12 times [2019-11-23 20:18:45,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:45,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929045516] [2019-11-23 20:18:45,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-11-23 20:18:45,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929045516] [2019-11-23 20:18:45,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635256746] [2019-11-23 20:18:45,401 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:47,556 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:18:47,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:47,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:18:47,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 20:18:47,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:47,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2019-11-23 20:18:47,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341920235] [2019-11-23 20:18:47,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:18:47,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:47,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:18:47,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:18:47,662 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand 26 states. [2019-11-23 20:18:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:48,105 INFO L93 Difference]: Finished difference Result 387 states and 442 transitions. [2019-11-23 20:18:48,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:18:48,106 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2019-11-23 20:18:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:48,107 INFO L225 Difference]: With dead ends: 387 [2019-11-23 20:18:48,108 INFO L226 Difference]: Without dead ends: 300 [2019-11-23 20:18:48,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=388, Invalid=668, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:18:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-11-23 20:18:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 136. [2019-11-23 20:18:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:18:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2019-11-23 20:18:48,121 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 100 [2019-11-23 20:18:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:48,121 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2019-11-23 20:18:48,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:18:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2019-11-23 20:18:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:18:48,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:48,122 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:48,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:48,329 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1338139829, now seen corresponding path program 13 times [2019-11-23 20:18:48,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:48,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269173985] [2019-11-23 20:18:48,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2019-11-23 20:18:48,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269173985] [2019-11-23 20:18:48,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466566241] [2019-11-23 20:18:48,651 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:48,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:18:48,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2019-11-23 20:18:48,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:48,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:18:48,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580907339] [2019-11-23 20:18:48,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:18:48,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:18:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:18:48,812 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand 21 states. [2019-11-23 20:18:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:49,074 INFO L93 Difference]: Finished difference Result 400 states and 454 transitions. [2019-11-23 20:18:49,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:18:49,074 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2019-11-23 20:18:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:49,076 INFO L225 Difference]: With dead ends: 400 [2019-11-23 20:18:49,076 INFO L226 Difference]: Without dead ends: 301 [2019-11-23 20:18:49,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:18:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-23 20:18:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 138. [2019-11-23 20:18:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:18:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 156 transitions. [2019-11-23 20:18:49,090 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 156 transitions. Word has length 111 [2019-11-23 20:18:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:49,090 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 156 transitions. [2019-11-23 20:18:49,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:18:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 156 transitions. [2019-11-23 20:18:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:18:49,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:49,092 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:49,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:49,295 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash 332265993, now seen corresponding path program 14 times [2019-11-23 20:18:49,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:49,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37037856] [2019-11-23 20:18:49,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2019-11-23 20:18:49,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37037856] [2019-11-23 20:18:49,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126628504] [2019-11-23 20:18:49,617 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:49,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:49,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:49,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:18:49,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2019-11-23 20:18:49,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:49,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:18:49,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345739199] [2019-11-23 20:18:49,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:18:49,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:49,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:18:49,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:49,810 INFO L87 Difference]: Start difference. First operand 138 states and 156 transitions. Second operand 22 states. [2019-11-23 20:18:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:50,056 INFO L93 Difference]: Finished difference Result 411 states and 466 transitions. [2019-11-23 20:18:50,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:18:50,059 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2019-11-23 20:18:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:50,060 INFO L225 Difference]: With dead ends: 411 [2019-11-23 20:18:50,060 INFO L226 Difference]: Without dead ends: 312 [2019-11-23 20:18:50,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-11-23 20:18:50,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 140. [2019-11-23 20:18:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:18:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2019-11-23 20:18:50,074 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 113 [2019-11-23 20:18:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:50,074 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2019-11-23 20:18:50,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:18:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2019-11-23 20:18:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:18:50,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:50,076 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:50,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:50,280 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash -725507769, now seen corresponding path program 15 times [2019-11-23 20:18:50,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:50,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580348914] [2019-11-23 20:18:50,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2019-11-23 20:18:50,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580348914] [2019-11-23 20:18:50,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902002494] [2019-11-23 20:18:50,571 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:51,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:18:51,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:51,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:18:51,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2019-11-23 20:18:51,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:51,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-11-23 20:18:51,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624873684] [2019-11-23 20:18:51,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:18:51,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:18:51,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:18:51,610 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand 30 states. [2019-11-23 20:18:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:52,096 INFO L93 Difference]: Finished difference Result 444 states and 506 transitions. [2019-11-23 20:18:52,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:18:52,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 115 [2019-11-23 20:18:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:52,098 INFO L225 Difference]: With dead ends: 444 [2019-11-23 20:18:52,098 INFO L226 Difference]: Without dead ends: 345 [2019-11-23 20:18:52,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:18:52,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-11-23 20:18:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 154. [2019-11-23 20:18:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-11-23 20:18:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2019-11-23 20:18:52,114 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 115 [2019-11-23 20:18:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:52,115 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2019-11-23 20:18:52,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:18:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2019-11-23 20:18:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-23 20:18:52,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:52,116 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:52,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:52,329 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash -829324243, now seen corresponding path program 16 times [2019-11-23 20:18:52,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:52,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919335828] [2019-11-23 20:18:52,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2019-11-23 20:18:52,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919335828] [2019-11-23 20:18:52,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629578434] [2019-11-23 20:18:52,636 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:52,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:52,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:52,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:18:52,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2019-11-23 20:18:52,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:52,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:18:52,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697999527] [2019-11-23 20:18:52,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:18:52,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:52,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:18:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:52,837 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand 24 states. [2019-11-23 20:18:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:53,192 INFO L93 Difference]: Finished difference Result 457 states and 518 transitions. [2019-11-23 20:18:53,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:18:53,193 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2019-11-23 20:18:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:53,194 INFO L225 Difference]: With dead ends: 457 [2019-11-23 20:18:53,194 INFO L226 Difference]: Without dead ends: 346 [2019-11-23 20:18:53,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2019-11-23 20:18:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 156. [2019-11-23 20:18:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:18:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 176 transitions. [2019-11-23 20:18:53,231 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 176 transitions. Word has length 126 [2019-11-23 20:18:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:53,232 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 176 transitions. [2019-11-23 20:18:53,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:18:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 176 transitions. [2019-11-23 20:18:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-23 20:18:53,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:53,233 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:53,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:53,438 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash -759426641, now seen corresponding path program 17 times [2019-11-23 20:18:53,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:53,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891464705] [2019-11-23 20:18:53,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2019-11-23 20:18:53,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891464705] [2019-11-23 20:18:53,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176834057] [2019-11-23 20:18:53,839 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:58,449 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-23 20:19:58,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:58,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:19:58,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2019-11-23 20:19:58,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:58,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2019-11-23 20:19:58,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885428340] [2019-11-23 20:19:58,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:19:58,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:58,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:19:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:58,737 INFO L87 Difference]: Start difference. First operand 156 states and 176 transitions. Second operand 33 states. [2019-11-23 20:19:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:59,446 INFO L93 Difference]: Finished difference Result 490 states and 558 transitions. [2019-11-23 20:19:59,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:19:59,446 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 128 [2019-11-23 20:19:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:59,449 INFO L225 Difference]: With dead ends: 490 [2019-11-23 20:19:59,449 INFO L226 Difference]: Without dead ends: 379 [2019-11-23 20:19:59,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1095, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:19:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-11-23 20:19:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 170. [2019-11-23 20:19:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-23 20:19:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2019-11-23 20:19:59,474 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 128 [2019-11-23 20:19:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:59,474 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2019-11-23 20:19:59,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:19:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2019-11-23 20:19:59,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:19:59,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:59,476 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:59,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:59,677 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash -441718595, now seen corresponding path program 18 times [2019-11-23 20:19:59,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:59,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393280048] [2019-11-23 20:19:59,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-11-23 20:20:00,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393280048] [2019-11-23 20:20:00,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704409145] [2019-11-23 20:20:00,100 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true