/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:53:30,875 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 02:53:30,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:53:30,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:53:30,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:53:30,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:53:30,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:53:30,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:53:30,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:53:30,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:53:30,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:53:30,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:53:30,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:53:30,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:53:30,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:53:30,999 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 [2020-08-19 02:53:31,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:53:31,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:53:31,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:53:31,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:53:31,023 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:53:31,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:53:31,024 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:53:31,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:53:31,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:53:31,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:53:31,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:53:31,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:53:31,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:53:31,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:53:31,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:53:31,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:53:31,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:53:31,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:53:31,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:53:31,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:53:31,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:53:31,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:53:31,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:53:31,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:53:31,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:53:31,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:53:31,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:53:31,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:53:31,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:53:31,028 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=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:53:31,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:53:31,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:53:31,375 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:53:31,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:53:31,378 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:53:31,378 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-08-19 02:53:31,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d65c1b399/af0f1f89b6794bf3aaa5016a0c3e6ffc/FLAGb6f30f32c [2020-08-19 02:53:31,935 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:53:31,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-08-19 02:53:31,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d65c1b399/af0f1f89b6794bf3aaa5016a0c3e6ffc/FLAGb6f30f32c [2020-08-19 02:53:32,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d65c1b399/af0f1f89b6794bf3aaa5016a0c3e6ffc [2020-08-19 02:53:32,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:53:32,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:53:32,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:53:32,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:53:32,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:53:32,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad4c324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32, skipping insertion in model container [2020-08-19 02:53:32,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:53:32,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:53:32,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:53:32,540 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:53:32,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:53:32,566 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:53:32,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32 WrapperNode [2020-08-19 02:53:32,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:53:32,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:53:32,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:53:32,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:53:32,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (1/1) ... [2020-08-19 02:53:32,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:53:32,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:53:32,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:53:32,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:53:32,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (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 [2020-08-19 02:53:32,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:53:32,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:53:32,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 02:53:32,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:53:32,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:53:32,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:53:32,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:53:32,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:53:32,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:53:32,911 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:53:32,911 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 02:53:32,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:53:32 BoogieIcfgContainer [2020-08-19 02:53:32,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:53:32,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:53:32,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:53:32,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:53:32,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:53:32" (1/3) ... [2020-08-19 02:53:32,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfb7bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:53:32, skipping insertion in model container [2020-08-19 02:53:32,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:32" (2/3) ... [2020-08-19 02:53:32,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfb7bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:53:32, skipping insertion in model container [2020-08-19 02:53:32,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:53:32" (3/3) ... [2020-08-19 02:53:32,923 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-08-19 02:53:32,934 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:53:32,941 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:53:32,955 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:53:32,974 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:53:32,975 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:53:32,975 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:53:32,975 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:53:32,975 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:53:32,975 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:53:32,975 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:53:32,976 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:53:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-19 02:53:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 02:53:32,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:32,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:32,998 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:33,004 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-19 02:53:33,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:33,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204954774] [2020-08-19 02:53:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:33,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204954774] [2020-08-19 02:53:33,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:33,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 02:53:33,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584410485] [2020-08-19 02:53:33,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 02:53:33,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:33,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 02:53:33,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 02:53:33,146 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-19 02:53:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:33,164 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-19 02:53:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 02:53:33,166 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-19 02:53:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:33,174 INFO L225 Difference]: With dead ends: 30 [2020-08-19 02:53:33,174 INFO L226 Difference]: Without dead ends: 13 [2020-08-19 02:53:33,178 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 [2020-08-19 02:53:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-19 02:53:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-19 02:53:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-19 02:53:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-19 02:53:33,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-19 02:53:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:33,212 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-19 02:53:33,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 02:53:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-19 02:53:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 02:53:33,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:33,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:33,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:53:33,214 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-19 02:53:33,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:33,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604201040] [2020-08-19 02:53:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:33,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604201040] [2020-08-19 02:53:33,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:33,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:53:33,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986356009] [2020-08-19 02:53:33,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:53:33,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:53:33,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:53:33,274 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-08-19 02:53:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:33,329 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-08-19 02:53:33,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:53:33,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-19 02:53:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:33,331 INFO L225 Difference]: With dead ends: 24 [2020-08-19 02:53:33,332 INFO L226 Difference]: Without dead ends: 16 [2020-08-19 02:53:33,333 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 [2020-08-19 02:53:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-19 02:53:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-08-19 02:53:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-19 02:53:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-19 02:53:33,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-08-19 02:53:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:33,341 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-19 02:53:33,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:53:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-19 02:53:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:53:33,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:33,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:33,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:53:33,350 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:33,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-19 02:53:33,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:33,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693790917] [2020-08-19 02:53:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:33,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693790917] [2020-08-19 02:53:33,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:33,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 02:53:33,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099148897] [2020-08-19 02:53:33,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:53:33,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:33,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:53:33,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:53:33,419 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-08-19 02:53:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:33,487 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-08-19 02:53:33,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:53:33,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-08-19 02:53:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:33,489 INFO L225 Difference]: With dead ends: 27 [2020-08-19 02:53:33,489 INFO L226 Difference]: Without dead ends: 19 [2020-08-19 02:53:33,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:53:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-19 02:53:33,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-19 02:53:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 02:53:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 02:53:33,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 02:53:33,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:33,497 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 02:53:33,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:53:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 02:53:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 02:53:33,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:33,498 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:33,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:53:33,499 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-19 02:53:33,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:33,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315640684] [2020-08-19 02:53:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:33,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315640684] [2020-08-19 02:53:33,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:33,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 02:53:33,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423035851] [2020-08-19 02:53:33,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:53:33,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:33,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:53:33,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:53:33,570 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-08-19 02:53:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:33,613 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-19 02:53:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:53:33,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-19 02:53:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:33,615 INFO L225 Difference]: With dead ends: 30 [2020-08-19 02:53:33,615 INFO L226 Difference]: Without dead ends: 22 [2020-08-19 02:53:33,616 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 [2020-08-19 02:53:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-19 02:53:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-19 02:53:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 02:53:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 02:53:33,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-08-19 02:53:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:33,623 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 02:53:33,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:53:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 02:53:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:53:33,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:33,625 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:33,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:53:33,625 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 3 times [2020-08-19 02:53:33,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:33,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187585778] [2020-08-19 02:53:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 02:53:33,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187585778] [2020-08-19 02:53:33,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:33,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:53:33,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605927920] [2020-08-19 02:53:33,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:53:33,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:53:33,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:53:33,708 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-08-19 02:53:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:33,742 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-08-19 02:53:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:53:33,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-19 02:53:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:33,744 INFO L225 Difference]: With dead ends: 30 [2020-08-19 02:53:33,744 INFO L226 Difference]: Without dead ends: 25 [2020-08-19 02:53:33,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:53:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-19 02:53:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-08-19 02:53:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 02:53:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-19 02:53:33,755 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-08-19 02:53:33,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:33,756 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-19 02:53:33,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:53:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-19 02:53:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:53:33,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:33,757 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:33,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:53:33,758 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:33,758 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2020-08-19 02:53:33,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:33,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443024749] [2020-08-19 02:53:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 02:53:33,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443024749] [2020-08-19 02:53:33,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:33,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 02:53:33,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441478332] [2020-08-19 02:53:33,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:53:33,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:53:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:53:33,854 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-08-19 02:53:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:33,901 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-08-19 02:53:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:53:33,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-19 02:53:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:33,904 INFO L225 Difference]: With dead ends: 33 [2020-08-19 02:53:33,905 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 02:53:33,905 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 [2020-08-19 02:53:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 02:53:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-19 02:53:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 02:53:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-08-19 02:53:33,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-08-19 02:53:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:33,912 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-08-19 02:53:33,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:53:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-08-19 02:53:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:53:33,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:33,914 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:33,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:53:33,914 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2146400685, now seen corresponding path program 2 times [2020-08-19 02:53:33,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:33,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862093874] [2020-08-19 02:53:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 02:53:33,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862093874] [2020-08-19 02:53:33,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:33,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:53:33,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124993629] [2020-08-19 02:53:33,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:53:33,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:33,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:53:33,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:53:33,988 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-08-19 02:53:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:34,040 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-19 02:53:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:53:34,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-19 02:53:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:34,042 INFO L225 Difference]: With dead ends: 36 [2020-08-19 02:53:34,042 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 02:53:34,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:53:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 02:53:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-08-19 02:53:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 02:53:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-19 02:53:34,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-08-19 02:53:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:34,050 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-19 02:53:34,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:53:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-19 02:53:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 02:53:34,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:34,052 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:34,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:53:34,052 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 3 times [2020-08-19 02:53:34,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:34,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123948439] [2020-08-19 02:53:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:34,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 02:53:34,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123948439] [2020-08-19 02:53:34,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:34,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:53:34,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436695969] [2020-08-19 02:53:34,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:53:34,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:34,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:53:34,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:53:34,125 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-08-19 02:53:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:34,202 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-08-19 02:53:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:53:34,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-19 02:53:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:34,204 INFO L225 Difference]: With dead ends: 39 [2020-08-19 02:53:34,204 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 02:53:34,205 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 [2020-08-19 02:53:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 02:53:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-19 02:53:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 02:53:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-08-19 02:53:34,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2020-08-19 02:53:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:34,212 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-08-19 02:53:34,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:53:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-08-19 02:53:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 02:53:34,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:34,213 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:34,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:53:34,214 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 4 times [2020-08-19 02:53:34,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:34,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422436539] [2020-08-19 02:53:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:34,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 02:53:34,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422436539] [2020-08-19 02:53:34,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:34,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:53:34,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114710976] [2020-08-19 02:53:34,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:53:34,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:34,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:53:34,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:53:34,308 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-08-19 02:53:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:34,360 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-08-19 02:53:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:53:34,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 02:53:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:34,362 INFO L225 Difference]: With dead ends: 40 [2020-08-19 02:53:34,362 INFO L226 Difference]: Without dead ends: 35 [2020-08-19 02:53:34,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:53:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-19 02:53:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-19 02:53:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-19 02:53:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-08-19 02:53:34,369 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-08-19 02:53:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:34,369 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-08-19 02:53:34,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:53:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-08-19 02:53:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 02:53:34,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:34,371 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:34,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:53:34,371 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:34,372 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 5 times [2020-08-19 02:53:34,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:34,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245167432] [2020-08-19 02:53:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 02:53:34,387 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 02:53:34,387 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 02:53:34,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:53:34,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:53:34 BoogieIcfgContainer [2020-08-19 02:53:34,409 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:53:34,412 INFO L168 Benchmark]: Toolchain (without parser) took 2071.91 ms. Allocated memory was 137.4 MB in the beginning and 229.1 MB in the end (delta: 91.8 MB). Free memory was 100.3 MB in the beginning and 176.8 MB in the end (delta: -76.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:34,413 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:53:34,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.31 ms. Allocated memory is still 137.4 MB. Free memory was 100.1 MB in the beginning and 90.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:34,415 INFO L168 Benchmark]: Boogie Preprocessor took 99.21 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 90.7 MB in the beginning and 178.8 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:34,415 INFO L168 Benchmark]: RCFGBuilder took 248.55 ms. Allocated memory is still 199.8 MB. Free memory was 178.8 MB in the beginning and 167.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:34,416 INFO L168 Benchmark]: TraceAbstraction took 1492.73 ms. Allocated memory was 199.8 MB in the beginning and 229.1 MB in the end (delta: 29.4 MB). Free memory was 166.8 MB in the beginning and 176.8 MB in the end (delta: -10.0 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:34,426 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.31 ms. Allocated memory is still 137.4 MB. Free memory was 100.1 MB in the beginning and 90.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.21 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 90.7 MB in the beginning and 178.8 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.55 ms. Allocated memory is still 199.8 MB. Free memory was 178.8 MB in the beginning and 167.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1492.73 ms. Allocated memory was 199.8 MB in the beginning and 229.1 MB in the end (delta: 29.4 MB). Free memory was 166.8 MB in the beginning and 176.8 MB in the end (delta: -10.0 MB). Peak memory consumption was 19.3 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, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 57 SDslu, 208 SDs, 0 SdLazy, 136 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 5925 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 140/196 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...