/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:02:48,217 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 15:02:48,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:02:48,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:02:48,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:02:48,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:02:48,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:02:48,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:02:48,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:02:48,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:02:48,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:02:48,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:02:48,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:02:48,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:02:48,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:02:48,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:02:48,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:02:48,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:02:48,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:02:48,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:02:48,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:02:48,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:02:48,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:02:48,373 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:02:48,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:02:48,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:02:48,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:02:48,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:02:48,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:02:48,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:02:48,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:02:48,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:02:48,375 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:02:48,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:02:48,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:02:48,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:02:48,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:02:48,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:02:48,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:02:48,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:02:48,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:02:48,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:02:48,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:02:48,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:02:48,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:02:48,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:02:48,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:02:48,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:02:48,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:02:48,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:02:48,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:02:48,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:02:48,695 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:02:48,698 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:02:48,699 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 15:02:48,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc2aa460b/bd955287db88475aa6f986cfad10b7a3/FLAG48175ce58 [2020-08-21 15:02:49,187 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:02:49,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 15:02:49,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc2aa460b/bd955287db88475aa6f986cfad10b7a3/FLAG48175ce58 [2020-08-21 15:02:49,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc2aa460b/bd955287db88475aa6f986cfad10b7a3 [2020-08-21 15:02:49,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:02:49,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:02:49,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:02:49,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:02:49,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:02:49,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:49,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348d845f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49, skipping insertion in model container [2020-08-21 15:02:49,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:49,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:02:49,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:02:49,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:02:49,925 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:02:49,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:02:49,964 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:02:49,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49 WrapperNode [2020-08-21 15:02:49,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:02:49,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:02:49,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:02:49,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:02:49,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:49,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:50,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:50,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:50,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:50,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:50,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (1/1) ... [2020-08-21 15:02:50,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:02:50,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:02:50,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:02:50,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:02:50,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 15:02:50,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:02:50,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:02:50,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:02:50,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:02:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:02:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:02:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 15:02:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:02:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:02:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:02:50,392 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:02:50,392 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:02:50,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:02:50 BoogieIcfgContainer [2020-08-21 15:02:50,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:02:50,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:02:50,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:02:50,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:02:50,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:02:49" (1/3) ... [2020-08-21 15:02:50,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7509c07c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:02:50, skipping insertion in model container [2020-08-21 15:02:50,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:49" (2/3) ... [2020-08-21 15:02:50,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7509c07c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:02:50, skipping insertion in model container [2020-08-21 15:02:50,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:02:50" (3/3) ... [2020-08-21 15:02:50,414 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-21 15:02:50,436 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:02:50,451 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:02:50,473 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:02:50,500 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:02:50,501 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:02:50,501 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:02:50,501 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:02:50,501 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:02:50,501 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:02:50,502 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:02:50,502 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:02:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 15:02:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 15:02:50,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:50,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:50,528 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:50,537 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-21 15:02:50,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:50,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773674596] [2020-08-21 15:02:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:50,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:02:50,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773674596] [2020-08-21 15:02:50,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:02:50,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 15:02:50,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138139916] [2020-08-21 15:02:50,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 15:02:50,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:50,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 15:02:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 15:02:50,729 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-21 15:02:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:50,751 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-21 15:02:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 15:02:50,752 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 15:02:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:50,760 INFO L225 Difference]: With dead ends: 31 [2020-08-21 15:02:50,760 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 15:02:50,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 15:02:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 15:02:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 15:02:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 15:02:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-21 15:02:50,800 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-21 15:02:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:50,800 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-21 15:02:50,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 15:02:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-21 15:02:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 15:02:50,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:50,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:50,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:02:50,802 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-21 15:02:50,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:50,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671512808] [2020-08-21 15:02:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:50,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:02:50,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671512808] [2020-08-21 15:02:50,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:02:50,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:02:50,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543047360] [2020-08-21 15:02:50,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:02:50,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:02:50,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:02:50,898 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-21 15:02:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:50,941 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-21 15:02:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:02:50,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-21 15:02:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:50,943 INFO L225 Difference]: With dead ends: 23 [2020-08-21 15:02:50,943 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 15:02:50,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:02:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 15:02:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 15:02:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 15:02:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-21 15:02:50,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-21 15:02:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:50,952 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-21 15:02:50,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:02:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-21 15:02:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 15:02:50,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:50,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:50,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:02:50,955 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:50,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-21 15:02:50,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:50,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959103286] [2020-08-21 15:02:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:51,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:02:51,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959103286] [2020-08-21 15:02:51,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:02:51,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:02:51,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345362385] [2020-08-21 15:02:51,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:02:51,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:51,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:02:51,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:02:51,221 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-21 15:02:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:51,336 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 15:02:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:02:51,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-21 15:02:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:51,339 INFO L225 Difference]: With dead ends: 33 [2020-08-21 15:02:51,340 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 15:02:51,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:02:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 15:02:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-21 15:02:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 15:02:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 15:02:51,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-21 15:02:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:51,349 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 15:02:51,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:02:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 15:02:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 15:02:51,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:51,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:51,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:02:51,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-21 15:02:51,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:51,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246093019] [2020-08-21 15:02:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:51,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 15:02:51,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246093019] [2020-08-21 15:02:51,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:02:51,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:02:51,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031352091] [2020-08-21 15:02:51,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:02:51,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:02:51,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:02:51,404 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-21 15:02:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:51,426 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 15:02:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:02:51,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 15:02:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:51,427 INFO L225 Difference]: With dead ends: 32 [2020-08-21 15:02:51,428 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 15:02:51,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:02:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 15:02:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 15:02:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 15:02:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 15:02:51,434 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-21 15:02:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:51,434 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 15:02:51,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:02:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 15:02:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 15:02:51,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:51,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:51,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:02:51,436 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-21 15:02:51,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:51,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873771531] [2020-08-21 15:02:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:51,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:02:51,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873771531] [2020-08-21 15:02:51,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:02:51,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:02:51,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135434803] [2020-08-21 15:02:51,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:02:51,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:51,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:02:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:02:51,493 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-21 15:02:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:51,540 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 15:02:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:02:51,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 15:02:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:51,542 INFO L225 Difference]: With dead ends: 30 [2020-08-21 15:02:51,542 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 15:02:51,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:02:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 15:02:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 15:02:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 15:02:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-21 15:02:51,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-21 15:02:51,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:51,549 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-21 15:02:51,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:02:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-21 15:02:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 15:02:51,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:51,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:51,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:02:51,550 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-21 15:02:51,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:51,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601602041] [2020-08-21 15:02:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:51,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 15:02:51,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601602041] [2020-08-21 15:02:51,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:02:51,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:02:51,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425101722] [2020-08-21 15:02:51,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:02:51,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:02:51,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:02:51,758 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-21 15:02:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:51,936 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-21 15:02:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:02:51,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-21 15:02:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:51,937 INFO L225 Difference]: With dead ends: 31 [2020-08-21 15:02:51,938 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 15:02:51,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:02:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 15:02:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 15:02:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 15:02:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 15:02:51,944 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-21 15:02:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:51,945 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 15:02:51,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:02:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 15:02:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 15:02:51,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:51,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:51,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:02:51,946 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:51,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-21 15:02:51,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:51,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199590015] [2020-08-21 15:02:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:52,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:02:52,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199590015] [2020-08-21 15:02:52,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:02:52,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:02:52,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750417244] [2020-08-21 15:02:52,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:02:52,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:52,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:02:52,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:02:52,022 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-21 15:02:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:52,072 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-21 15:02:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:02:52,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 15:02:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:52,074 INFO L225 Difference]: With dead ends: 38 [2020-08-21 15:02:52,074 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 15:02:52,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:02:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 15:02:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-21 15:02:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 15:02:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-21 15:02:52,080 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-21 15:02:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:52,081 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-21 15:02:52,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:02:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-21 15:02:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 15:02:52,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:52,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:52,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:02:52,083 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-21 15:02:52,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:52,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717819542] [2020-08-21 15:02:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:52,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:02:52,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717819542] [2020-08-21 15:02:52,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:02:52,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:02:52,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698164426] [2020-08-21 15:02:52,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:02:52,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:52,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:02:52,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:02:52,208 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-21 15:02:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:52,285 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-21 15:02:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:02:52,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 15:02:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:52,287 INFO L225 Difference]: With dead ends: 42 [2020-08-21 15:02:52,288 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 15:02:52,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:02:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 15:02:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 15:02:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 15:02:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-21 15:02:52,299 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-21 15:02:52,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:52,301 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-21 15:02:52,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:02:52,301 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-21 15:02:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 15:02:52,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:52,302 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:52,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:02:52,302 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:52,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:52,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-21 15:02:52,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:52,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663652588] [2020-08-21 15:02:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:52,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:02:52,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663652588] [2020-08-21 15:02:52,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:02:52,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 15:02:52,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768434996] [2020-08-21 15:02:52,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:02:52,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:02:52,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:02:52,438 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-21 15:02:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:52,516 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-21 15:02:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:02:52,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 15:02:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:52,518 INFO L225 Difference]: With dead ends: 46 [2020-08-21 15:02:52,519 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 15:02:52,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:02:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 15:02:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-21 15:02:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 15:02:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 15:02:52,526 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-21 15:02:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:52,527 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 15:02:52,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:02:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 15:02:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 15:02:52,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:52,528 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:02:52,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:02:52,529 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-21 15:02:52,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:52,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723526011] [2020-08-21 15:02:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:02:52,559 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:02:52,560 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:02:52,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:02:52,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:02:52 BoogieIcfgContainer [2020-08-21 15:02:52,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:02:52,593 INFO L168 Benchmark]: Toolchain (without parser) took 2940.29 ms. Allocated memory was 142.1 MB in the beginning and 231.7 MB in the end (delta: 89.7 MB). Free memory was 105.5 MB in the beginning and 89.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 105.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:52,594 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.2 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 15:02:52,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.68 ms. Allocated memory is still 142.1 MB. Free memory was 105.0 MB in the beginning and 95.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:52,595 INFO L168 Benchmark]: Boogie Preprocessor took 123.68 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 95.5 MB in the beginning and 183.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:52,599 INFO L168 Benchmark]: RCFGBuilder took 306.49 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 171.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:52,600 INFO L168 Benchmark]: TraceAbstraction took 2193.25 ms. Allocated memory was 204.5 MB in the beginning and 231.7 MB in the end (delta: 27.3 MB). Free memory was 170.2 MB in the beginning and 89.7 MB in the end (delta: 80.4 MB). Peak memory consumption was 107.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:52,604 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.2 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.68 ms. Allocated memory is still 142.1 MB. Free memory was 105.0 MB in the beginning and 95.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.68 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 95.5 MB in the beginning and 183.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.49 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 171.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2193.25 ms. Allocated memory was 204.5 MB in the beginning and 231.7 MB in the end (delta: 27.3 MB). Free memory was 170.2 MB in the beginning and 89.7 MB in the end (delta: 80.4 MB). Peak memory consumption was 107.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i