/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --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 17:27:42,116 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 17:27:42,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:27:42,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:27:42,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:27:42,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:27:42,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:27:42,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:27:42,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:27:42,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:27:42,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:27:42,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:27:42,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:27:42,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:27:42,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 17:27:42,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:27:42,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:27:42,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:27:42,181 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 17:27:42,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:27:42,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:27:42,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:27:42,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:27:42,207 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:27:42,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:27:42,207 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:27:42,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:27:42,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:27:42,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:27:42,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:27:42,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:27:42,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:27:42,208 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:27:42,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:27:42,209 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:27:42,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:27:42,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:27:42,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:27:42,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:27:42,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:27:42,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:27:42,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:27:42,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:27:42,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:27:42,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:27:42,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:27:42,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:27:42,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:27:42,211 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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:27:42,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:27:42,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:27:42,550 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:27:42,551 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:27:42,552 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:27:42,552 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 17:27:42,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50ee02ece/8df2f2d120ce49658f9a49526e083119/FLAG1a5f4219e [2020-08-21 17:27:43,067 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:27:43,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-21 17:27:43,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50ee02ece/8df2f2d120ce49658f9a49526e083119/FLAG1a5f4219e [2020-08-21 17:27:43,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50ee02ece/8df2f2d120ce49658f9a49526e083119 [2020-08-21 17:27:43,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:27:43,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:27:43,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:27:43,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:27:43,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:27:43,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7442a78b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43, skipping insertion in model container [2020-08-21 17:27:43,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:27:43,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:27:43,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:27:43,687 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:27:43,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:27:43,717 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:27:43,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43 WrapperNode [2020-08-21 17:27:43,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:27:43,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:27:43,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:27:43,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:27:43,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (1/1) ... [2020-08-21 17:27:43,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:27:43,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:27:43,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:27:43,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:27:43,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (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 17:27:43,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:27:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:27:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 17:27:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:27:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:27:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 17:27:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 17:27:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:27:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:27:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:27:44,069 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:27:44,070 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 17:27:44,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:27:44 BoogieIcfgContainer [2020-08-21 17:27:44,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:27:44,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:27:44,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:27:44,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:27:44,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:27:43" (1/3) ... [2020-08-21 17:27:44,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a71396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:27:44, skipping insertion in model container [2020-08-21 17:27:44,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:43" (2/3) ... [2020-08-21 17:27:44,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a71396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:27:44, skipping insertion in model container [2020-08-21 17:27:44,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:27:44" (3/3) ... [2020-08-21 17:27:44,087 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-21 17:27:44,096 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:27:44,106 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:27:44,121 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:27:44,146 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:27:44,147 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:27:44,147 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:27:44,147 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:27:44,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:27:44,147 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:27:44,147 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:27:44,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:27:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 17:27:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 17:27:44,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:44,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:44,171 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:44,176 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-21 17:27:44,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:44,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123090287] [2020-08-21 17:27:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:44,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:44,303 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 17:27:44,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123090287] [2020-08-21 17:27:44,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:44,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 17:27:44,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753791084] [2020-08-21 17:27:44,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 17:27:44,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:44,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 17:27:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 17:27:44,332 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-21 17:27:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:44,358 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-21 17:27:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 17:27:44,360 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 17:27:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:44,369 INFO L225 Difference]: With dead ends: 31 [2020-08-21 17:27:44,369 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 17:27:44,373 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 17:27:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 17:27:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 17:27:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 17:27:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-21 17:27:44,416 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-21 17:27:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:44,417 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-21 17:27:44,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 17:27:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-21 17:27:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 17:27:44,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:44,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:44,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:27:44,419 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-21 17:27:44,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:44,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748961530] [2020-08-21 17:27:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:44,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:44,522 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 17:27:44,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748961530] [2020-08-21 17:27:44,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:44,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:27:44,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244064269] [2020-08-21 17:27:44,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:27:44,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:44,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:27:44,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:27:44,526 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-21 17:27:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:44,565 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-21 17:27:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:27:44,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-21 17:27:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:44,567 INFO L225 Difference]: With dead ends: 23 [2020-08-21 17:27:44,567 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 17:27:44,569 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 17:27:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 17:27:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 17:27:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 17:27:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-21 17:27:44,575 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-21 17:27:44,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:44,576 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-21 17:27:44,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:27:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-21 17:27:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 17:27:44,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:44,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:44,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:27:44,579 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-21 17:27:44,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:44,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270462241] [2020-08-21 17:27:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:44,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:44,924 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 17:27:44,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270462241] [2020-08-21 17:27:44,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:44,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:27:44,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888975132] [2020-08-21 17:27:44,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:27:44,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:27:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:27:44,928 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-21 17:27:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:45,032 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 17:27:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:27:45,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-21 17:27:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:45,035 INFO L225 Difference]: With dead ends: 33 [2020-08-21 17:27:45,035 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 17:27:45,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:27:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 17:27:45,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-21 17:27:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 17:27:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 17:27:45,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-21 17:27:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:45,045 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 17:27:45,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:27:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 17:27:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:27:45,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:45,046 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:45,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:27:45,047 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-21 17:27:45,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:45,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272927583] [2020-08-21 17:27:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,094 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 17:27:45,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272927583] [2020-08-21 17:27:45,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:45,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:27:45,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374982570] [2020-08-21 17:27:45,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:27:45,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:45,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:27:45,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:27:45,097 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-21 17:27:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:45,121 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 17:27:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:27:45,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 17:27:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:45,122 INFO L225 Difference]: With dead ends: 32 [2020-08-21 17:27:45,122 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 17:27:45,123 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 17:27:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 17:27:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 17:27:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 17:27:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 17:27:45,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-21 17:27:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:45,129 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 17:27:45,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:27:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 17:27:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:27:45,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:45,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:45,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:27:45,131 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-21 17:27:45,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:45,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925352410] [2020-08-21 17:27:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,218 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 17:27:45,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925352410] [2020-08-21 17:27:45,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:45,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 17:27:45,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833176344] [2020-08-21 17:27:45,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:27:45,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:45,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:27:45,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:27:45,221 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-21 17:27:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:45,268 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 17:27:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:27:45,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 17:27:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:45,271 INFO L225 Difference]: With dead ends: 30 [2020-08-21 17:27:45,272 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 17:27:45,272 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 17:27:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 17:27:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 17:27:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 17:27:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-21 17:27:45,283 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-21 17:27:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:45,283 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-21 17:27:45,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:27:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-21 17:27:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:27:45,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:45,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:45,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:27:45,288 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-21 17:27:45,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:45,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984009240] [2020-08-21 17:27:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,542 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 17:27:45,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984009240] [2020-08-21 17:27:45,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:45,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:27:45,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055864072] [2020-08-21 17:27:45,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:27:45,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:27:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:27:45,545 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-21 17:27:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:45,709 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-21 17:27:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:27:45,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-21 17:27:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:45,711 INFO L225 Difference]: With dead ends: 31 [2020-08-21 17:27:45,711 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 17:27:45,712 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 17:27:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 17:27:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 17:27:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 17:27:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 17:27:45,718 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-21 17:27:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:45,718 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 17:27:45,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:27:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 17:27:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:27:45,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:45,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:45,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:27:45,720 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:45,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-21 17:27:45,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:45,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284011709] [2020-08-21 17:27:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,794 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 17:27:45,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284011709] [2020-08-21 17:27:45,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:45,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:27:45,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079492207] [2020-08-21 17:27:45,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:27:45,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:27:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:27:45,797 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-21 17:27:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:45,841 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-21 17:27:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:27:45,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-21 17:27:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:45,842 INFO L225 Difference]: With dead ends: 38 [2020-08-21 17:27:45,844 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 17:27:45,844 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 17:27:45,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 17:27:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-21 17:27:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 17:27:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-21 17:27:45,853 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-21 17:27:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:45,853 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-21 17:27:45,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:27:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-21 17:27:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 17:27:45,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:45,856 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:45,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:27:45,857 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-21 17:27:45,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:45,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80981687] [2020-08-21 17:27:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:45,962 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 17:27:45,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80981687] [2020-08-21 17:27:45,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:45,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:27:45,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349459249] [2020-08-21 17:27:45,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:27:45,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:27:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:27:45,965 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-21 17:27:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:46,017 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-21 17:27:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:27:46,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-21 17:27:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:46,019 INFO L225 Difference]: With dead ends: 42 [2020-08-21 17:27:46,019 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 17:27:46,020 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 17:27:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 17:27:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 17:27:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 17:27:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-21 17:27:46,026 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-21 17:27:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:46,026 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-21 17:27:46,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:27:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-21 17:27:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 17:27:46,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:46,027 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:46,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:27:46,028 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:46,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-21 17:27:46,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:46,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691005379] [2020-08-21 17:27:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:46,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:46,138 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 17:27:46,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691005379] [2020-08-21 17:27:46,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:46,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 17:27:46,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780515338] [2020-08-21 17:27:46,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:27:46,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:46,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:27:46,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:27:46,141 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-21 17:27:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:46,211 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-21 17:27:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:27:46,211 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-21 17:27:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:46,212 INFO L225 Difference]: With dead ends: 46 [2020-08-21 17:27:46,213 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 17:27:46,213 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 17:27:46,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 17:27:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-21 17:27:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 17:27:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 17:27:46,220 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-21 17:27:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:46,221 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 17:27:46,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:27:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 17:27:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 17:27:46,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:46,222 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:46,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:27:46,223 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-21 17:27:46,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:46,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083426305] [2020-08-21 17:27:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:27:46,247 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:27:46,248 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:27:46,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:27:46,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:27:46 BoogieIcfgContainer [2020-08-21 17:27:46,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:27:46,279 INFO L168 Benchmark]: Toolchain (without parser) took 2803.39 ms. Allocated memory was 138.4 MB in the beginning and 231.7 MB in the end (delta: 93.3 MB). Free memory was 101.3 MB in the beginning and 96.9 MB in the end (delta: 4.4 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:46,280 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:27:46,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.38 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 91.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:46,282 INFO L168 Benchmark]: Boogie Preprocessor took 95.02 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.6 MB in the beginning and 179.3 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:46,283 INFO L168 Benchmark]: RCFGBuilder took 259.69 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 166.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:46,284 INFO L168 Benchmark]: TraceAbstraction took 2201.27 ms. Allocated memory was 200.3 MB in the beginning and 231.7 MB in the end (delta: 31.5 MB). Free memory was 166.4 MB in the beginning and 96.9 MB in the end (delta: 69.5 MB). Peak memory consumption was 100.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:46,288 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.38 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 91.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.02 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.6 MB in the beginning and 179.3 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.69 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 166.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2201.27 ms. Allocated memory was 200.3 MB in the beginning and 231.7 MB in the end (delta: 31.5 MB). Free memory was 166.4 MB in the beginning and 96.9 MB in the end (delta: 69.5 MB). Peak memory consumption was 100.9 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