/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:37:08,202 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 19:37:08,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:37:08,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:37:08,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:37:08,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:37:08,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:37:08,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:37:08,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:37:08,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:37:08,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:37:08,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:37:08,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:37:08,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:37:08,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:37:08,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:37:08,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:37:08,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:37:08,288 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 [2020-08-18 19:37:08,312 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:37:08,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:37:08,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:37:08,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:37:08,314 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:37:08,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:37:08,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:37:08,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:37:08,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:37:08,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:37:08,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:37:08,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:37:08,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:37:08,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:37:08,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:37:08,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:37:08,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:37:08,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:37:08,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:37:08,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:37:08,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:37:08,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:37:08,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:37:08,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:37:08,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:37:08,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:37:08,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:37:08,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:37:08,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:37:08,319 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 -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:37:08,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:37:08,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:37:08,655 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:37:08,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:37:08,657 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:37:08,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-18 19:37:08,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9f532742/e94a97edc9014184944cf46a4b51648a/FLAG9702234a8 [2020-08-18 19:37:09,198 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:37:09,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-18 19:37:09,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9f532742/e94a97edc9014184944cf46a4b51648a/FLAG9702234a8 [2020-08-18 19:37:09,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9f532742/e94a97edc9014184944cf46a4b51648a [2020-08-18 19:37:09,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:37:09,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:37:09,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:37:09,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:37:09,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:37:09,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243023c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09, skipping insertion in model container [2020-08-18 19:37:09,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:37:09,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:37:09,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:37:09,752 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:37:09,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:37:09,782 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:37:09,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09 WrapperNode [2020-08-18 19:37:09,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:37:09,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:37:09,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:37:09,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:37:09,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (1/1) ... [2020-08-18 19:37:09,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:37:09,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:37:09,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:37:09,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:37:09,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (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 [2020-08-18 19:37:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:37:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:37:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 19:37:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:37:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:37:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 19:37:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 19:37:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:37:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:37:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:37:10,163 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:37:10,163 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 19:37:10,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:37:10 BoogieIcfgContainer [2020-08-18 19:37:10,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:37:10,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:37:10,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:37:10,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:37:10,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:37:09" (1/3) ... [2020-08-18 19:37:10,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d764bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:37:10, skipping insertion in model container [2020-08-18 19:37:10,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:09" (2/3) ... [2020-08-18 19:37:10,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d764bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:37:10, skipping insertion in model container [2020-08-18 19:37:10,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:37:10" (3/3) ... [2020-08-18 19:37:10,192 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-18 19:37:10,230 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:37:10,238 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:37:10,267 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:37:10,292 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:37:10,292 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:37:10,293 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:37:10,293 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:37:10,293 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:37:10,293 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:37:10,293 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:37:10,293 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:37:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 19:37:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 19:37:10,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:10,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:10,318 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-18 19:37:10,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:10,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026851223] [2020-08-18 19:37:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:10,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:37:10,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026851223] [2020-08-18 19:37:10,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:37:10,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 19:37:10,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781893859] [2020-08-18 19:37:10,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 19:37:10,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 19:37:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 19:37:10,484 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-18 19:37:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:10,508 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-18 19:37:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 19:37:10,510 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 19:37:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:10,519 INFO L225 Difference]: With dead ends: 31 [2020-08-18 19:37:10,519 INFO L226 Difference]: Without dead ends: 14 [2020-08-18 19:37:10,523 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 [2020-08-18 19:37:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-18 19:37:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-18 19:37:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-18 19:37:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-18 19:37:10,564 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-18 19:37:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:10,564 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-18 19:37:10,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 19:37:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-18 19:37:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 19:37:10,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:10,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:10,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:37:10,566 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-18 19:37:10,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:10,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858532109] [2020-08-18 19:37:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:10,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:37:10,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858532109] [2020-08-18 19:37:10,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:37:10,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 19:37:10,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569004642] [2020-08-18 19:37:10,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:37:10,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:37:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:37:10,701 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-18 19:37:10,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:10,788 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-18 19:37:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:37:10,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 19:37:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:10,790 INFO L225 Difference]: With dead ends: 23 [2020-08-18 19:37:10,791 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 19:37:10,792 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 [2020-08-18 19:37:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 19:37:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 19:37:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 19:37:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-18 19:37:10,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-18 19:37:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:10,805 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-18 19:37:10,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:37:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-18 19:37:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 19:37:10,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:10,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:10,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:37:10,809 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-18 19:37:10,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:10,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735366310] [2020-08-18 19:37:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:11,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:37:11,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735366310] [2020-08-18 19:37:11,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:37:11,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 19:37:11,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054541453] [2020-08-18 19:37:11,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 19:37:11,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 19:37:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:37:11,144 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-18 19:37:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:11,286 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 19:37:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 19:37:11,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-18 19:37:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:11,290 INFO L225 Difference]: With dead ends: 33 [2020-08-18 19:37:11,290 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 19:37:11,291 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 [2020-08-18 19:37:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 19:37:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-18 19:37:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 19:37:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-18 19:37:11,310 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-18 19:37:11,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:11,310 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-18 19:37:11,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 19:37:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-18 19:37:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 19:37:11,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:11,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:11,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:37:11,313 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-18 19:37:11,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:11,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190907058] [2020-08-18 19:37:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:11,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 19:37:11,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190907058] [2020-08-18 19:37:11,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:37:11,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:37:11,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935305788] [2020-08-18 19:37:11,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:37:11,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:37:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:37:11,379 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-18 19:37:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:11,400 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 19:37:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:37:11,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 19:37:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:11,401 INFO L225 Difference]: With dead ends: 32 [2020-08-18 19:37:11,402 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 19:37:11,402 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 [2020-08-18 19:37:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 19:37:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 19:37:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 19:37:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-18 19:37:11,408 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-18 19:37:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:11,409 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-18 19:37:11,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:37:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-18 19:37:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 19:37:11,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:11,410 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:11,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:37:11,410 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-18 19:37:11,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:11,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802276288] [2020-08-18 19:37:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:11,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:37:11,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802276288] [2020-08-18 19:37:11,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:37:11,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 19:37:11,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391428834] [2020-08-18 19:37:11,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:37:11,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:37:11,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:37:11,465 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-18 19:37:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:11,508 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 19:37:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:37:11,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 19:37:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:11,510 INFO L225 Difference]: With dead ends: 30 [2020-08-18 19:37:11,510 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 19:37:11,511 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 [2020-08-18 19:37:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 19:37:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-18 19:37:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 19:37:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 19:37:11,516 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-18 19:37:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:11,517 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 19:37:11,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:37:11,517 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 19:37:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 19:37:11,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:11,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:11,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:37:11,519 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-18 19:37:11,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:11,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525398341] [2020-08-18 19:37:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:11,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 19:37:11,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525398341] [2020-08-18 19:37:11,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:37:11,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 19:37:11,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115221058] [2020-08-18 19:37:11,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 19:37:11,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:11,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 19:37:11,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:37:11,743 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-18 19:37:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:11,951 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-18 19:37:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 19:37:11,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-18 19:37:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:11,955 INFO L225 Difference]: With dead ends: 31 [2020-08-18 19:37:11,956 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 19:37:11,959 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 [2020-08-18 19:37:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 19:37:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-18 19:37:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 19:37:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 19:37:11,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-18 19:37:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:11,970 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 19:37:11,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 19:37:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 19:37:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 19:37:11,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:11,974 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:11,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:37:11,975 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-18 19:37:11,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:11,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347841164] [2020-08-18 19:37:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:12,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:37:12,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347841164] [2020-08-18 19:37:12,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:37:12,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 19:37:12,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089872852] [2020-08-18 19:37:12,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 19:37:12,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 19:37:12,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 19:37:12,088 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-18 19:37:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:12,136 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-18 19:37:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 19:37:12,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-18 19:37:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:12,138 INFO L225 Difference]: With dead ends: 38 [2020-08-18 19:37:12,138 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 19:37:12,139 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 [2020-08-18 19:37:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 19:37:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-18 19:37:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 19:37:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-18 19:37:12,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-18 19:37:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:12,145 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-18 19:37:12,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 19:37:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-18 19:37:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:37:12,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:12,146 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:12,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:37:12,147 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-18 19:37:12,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:12,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605798198] [2020-08-18 19:37:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:12,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:37:12,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605798198] [2020-08-18 19:37:12,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:37:12,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 19:37:12,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144535721] [2020-08-18 19:37:12,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 19:37:12,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 19:37:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:37:12,234 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-18 19:37:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:12,295 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-18 19:37:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 19:37:12,296 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-18 19:37:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:12,297 INFO L225 Difference]: With dead ends: 42 [2020-08-18 19:37:12,297 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 19:37:12,298 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 [2020-08-18 19:37:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 19:37:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-18 19:37:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 19:37:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-18 19:37:12,304 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-18 19:37:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:12,304 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-18 19:37:12,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 19:37:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-18 19:37:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 19:37:12,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:12,306 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:12,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:37:12,306 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-18 19:37:12,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:12,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630810289] [2020-08-18 19:37:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:12,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:37:12,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630810289] [2020-08-18 19:37:12,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:37:12,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 19:37:12,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738987674] [2020-08-18 19:37:12,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 19:37:12,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 19:37:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:37:12,436 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-18 19:37:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:12,519 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-18 19:37:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 19:37:12,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-18 19:37:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:12,521 INFO L225 Difference]: With dead ends: 46 [2020-08-18 19:37:12,521 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 19:37:12,523 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 [2020-08-18 19:37:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 19:37:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-18 19:37:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 19:37:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-18 19:37:12,530 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-18 19:37:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:12,531 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-18 19:37:12,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 19:37:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-18 19:37:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 19:37:12,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:12,532 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:12,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:37:12,533 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:12,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:12,533 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-18 19:37:12,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:12,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008018515] [2020-08-18 19:37:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:37:12,553 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:37:12,554 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:37:12,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 19:37:12,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:37:12 BoogieIcfgContainer [2020-08-18 19:37:12,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:37:12,578 INFO L168 Benchmark]: Toolchain (without parser) took 3024.70 ms. Allocated memory was 136.8 MB in the beginning and 228.1 MB in the end (delta: 91.2 MB). Free memory was 100.5 MB in the beginning and 96.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:12,579 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 19:37:12,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.68 ms. Allocated memory is still 136.8 MB. Free memory was 100.3 MB in the beginning and 90.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:12,581 INFO L168 Benchmark]: Boogie Preprocessor took 106.06 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.9 MB in the beginning and 179.7 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:12,581 INFO L168 Benchmark]: RCFGBuilder took 278.68 ms. Allocated memory is still 199.8 MB. Free memory was 179.7 MB in the beginning and 166.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:12,582 INFO L168 Benchmark]: TraceAbstraction took 2394.08 ms. Allocated memory was 199.8 MB in the beginning and 228.1 MB in the end (delta: 28.3 MB). Free memory was 166.0 MB in the beginning and 96.7 MB in the end (delta: 69.3 MB). Peak memory consumption was 97.6 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:12,586 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.68 ms. Allocated memory is still 136.8 MB. Free memory was 100.3 MB in the beginning and 90.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.06 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.9 MB in the beginning and 179.7 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.68 ms. Allocated memory is still 199.8 MB. Free memory was 179.7 MB in the beginning and 166.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2394.08 ms. Allocated memory was 199.8 MB in the beginning and 228.1 MB in the end (delta: 28.3 MB). Free memory was 166.0 MB in the beginning and 96.7 MB in the end (delta: 69.3 MB). Peak memory consumption was 97.6 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