/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:29:33,542 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 15:29:33,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:29:33,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:29:33,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:29:33,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:29:33,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:29:33,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:29:33,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:29:33,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:29:33,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:29:33,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:29:33,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:29:33,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:29:33,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:29:33,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:29:33,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:29:33,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:29:33,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:29:33,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:29:33,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:29:33,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:29:33,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:29:33,696 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:29:33,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:29:33,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:29:33,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:29:33,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:29:33,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:29:33,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:29:33,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:29:33,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:29:33,697 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:29:33,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:29:33,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:29:33,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:29:33,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:29:33,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:29:33,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:29:33,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:29:33,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:29:33,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:29:33,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:29:33,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:29:33,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:29:33,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:29:33,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:29:33,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:29:33,701 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 -> false [2020-08-18 15:29:34,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:29:34,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:29:34,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:29:34,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:29:34,053 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:29:34,054 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-18 15:29:34,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d7d8c527/ff6f3ffd6b7e4b0d95ffd71c438017fe/FLAG22c64a0e4 [2020-08-18 15:29:34,555 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:29:34,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-18 15:29:34,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d7d8c527/ff6f3ffd6b7e4b0d95ffd71c438017fe/FLAG22c64a0e4 [2020-08-18 15:29:34,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d7d8c527/ff6f3ffd6b7e4b0d95ffd71c438017fe [2020-08-18 15:29:34,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:29:34,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:29:34,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:29:34,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:29:34,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:29:34,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:29:34" (1/1) ... [2020-08-18 15:29:34,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18cc86df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:34, skipping insertion in model container [2020-08-18 15:29:34,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:29:34" (1/1) ... [2020-08-18 15:29:34,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:29:35,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:29:35,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:29:35,201 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:29:35,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:29:35,325 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:29:35,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35 WrapperNode [2020-08-18 15:29:35,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:29:35,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:29:35,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:29:35,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:29:35,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (1/1) ... [2020-08-18 15:29:35,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (1/1) ... [2020-08-18 15:29:35,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (1/1) ... [2020-08-18 15:29:35,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (1/1) ... [2020-08-18 15:29:35,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (1/1) ... [2020-08-18 15:29:35,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (1/1) ... [2020-08-18 15:29:35,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (1/1) ... [2020-08-18 15:29:35,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:29:35,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:29:35,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:29:35,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:29:35,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:29:35,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:29:35,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:29:35,430 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-18 15:29:35,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:29:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:29:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:29:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 15:29:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 15:29:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:29:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 15:29:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 15:29:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 15:29:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:29:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:29:35,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:29:35,678 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 15:29:35,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:29:35 BoogieIcfgContainer [2020-08-18 15:29:35,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:29:35,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:29:35,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:29:35,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:29:35,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:29:34" (1/3) ... [2020-08-18 15:29:35,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634649ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:29:35, skipping insertion in model container [2020-08-18 15:29:35,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:29:35" (2/3) ... [2020-08-18 15:29:35,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634649ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:29:35, skipping insertion in model container [2020-08-18 15:29:35,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:29:35" (3/3) ... [2020-08-18 15:29:35,692 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-18 15:29:35,714 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:29:35,730 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:29:35,760 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:29:35,788 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:29:35,788 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:29:35,788 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:29:35,788 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:29:35,788 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:29:35,789 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:29:35,789 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:29:35,789 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:29:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-18 15:29:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 15:29:35,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:35,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:35,812 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-08-18 15:29:35,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:35,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568040264] [2020-08-18 15:29:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:35,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:35,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 15:29:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:36,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568040264] [2020-08-18 15:29:36,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:36,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:36,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151026699] [2020-08-18 15:29:36,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:36,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:36,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:36,040 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-18 15:29:36,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:36,139 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-18 15:29:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:36,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 15:29:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:36,149 INFO L225 Difference]: With dead ends: 42 [2020-08-18 15:29:36,150 INFO L226 Difference]: Without dead ends: 20 [2020-08-18 15:29:36,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-18 15:29:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-18 15:29:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 15:29:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 15:29:36,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-08-18 15:29:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:36,187 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 15:29:36,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 15:29:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:29:36,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:36,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:36,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:29:36,189 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-08-18 15:29:36,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:36,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125131212] [2020-08-18 15:29:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 15:29:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:36,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125131212] [2020-08-18 15:29:36,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:36,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:29:36,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523251374] [2020-08-18 15:29:36,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:29:36,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:36,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:29:36,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:29:36,289 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-08-18 15:29:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:36,367 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-18 15:29:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 15:29:36,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-18 15:29:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:36,369 INFO L225 Difference]: With dead ends: 34 [2020-08-18 15:29:36,369 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 15:29:36,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:29:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 15:29:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-18 15:29:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 15:29:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 15:29:36,380 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-08-18 15:29:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:36,381 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 15:29:36,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:29:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 15:29:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 15:29:36,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:36,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:36,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:29:36,384 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-08-18 15:29:36,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:36,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419035613] [2020-08-18 15:29:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 15:29:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:36,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419035613] [2020-08-18 15:29:36,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:36,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 15:29:36,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382129153] [2020-08-18 15:29:36,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:29:36,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:29:36,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:29:36,524 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-18 15:29:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:36,584 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-08-18 15:29:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:29:36,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 15:29:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:36,585 INFO L225 Difference]: With dead ends: 36 [2020-08-18 15:29:36,585 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 15:29:36,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:29:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 15:29:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-18 15:29:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 15:29:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-18 15:29:36,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-08-18 15:29:36,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:36,593 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-18 15:29:36,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:29:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-18 15:29:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:29:36,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:36,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:36,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:29:36,595 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:36,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-08-18 15:29:36,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:36,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969505591] [2020-08-18 15:29:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 15:29:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:36,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969505591] [2020-08-18 15:29:36,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:36,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 15:29:36,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491437893] [2020-08-18 15:29:36,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:29:36,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:29:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:29:36,727 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-18 15:29:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:36,834 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-18 15:29:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:29:36,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-18 15:29:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:36,838 INFO L225 Difference]: With dead ends: 38 [2020-08-18 15:29:36,838 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 15:29:36,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:29:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 15:29:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-18 15:29:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 15:29:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-18 15:29:36,852 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-08-18 15:29:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:36,853 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-18 15:29:36,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:29:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-18 15:29:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 15:29:36,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:36,858 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:36,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:29:36,859 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-08-18 15:29:36,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:36,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612243620] [2020-08-18 15:29:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 15:29:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:36,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612243620] [2020-08-18 15:29:36,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:36,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:29:36,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937376113] [2020-08-18 15:29:36,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:29:36,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:36,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:29:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:29:36,969 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-08-18 15:29:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:37,031 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-08-18 15:29:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:29:37,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-18 15:29:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:37,032 INFO L225 Difference]: With dead ends: 40 [2020-08-18 15:29:37,032 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 15:29:37,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:29:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 15:29:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 15:29:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 15:29:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 15:29:37,039 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-08-18 15:29:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:37,040 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 15:29:37,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:29:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 15:29:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 15:29:37,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:37,041 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:37,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:29:37,042 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:37,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-08-18 15:29:37,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:37,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671212365] [2020-08-18 15:29:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 15:29:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:37,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671212365] [2020-08-18 15:29:37,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:37,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:29:37,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823052517] [2020-08-18 15:29:37,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:29:37,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:29:37,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:29:37,165 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-08-18 15:29:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:37,239 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-18 15:29:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:29:37,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-18 15:29:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:37,240 INFO L225 Difference]: With dead ends: 42 [2020-08-18 15:29:37,241 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 15:29:37,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:29:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 15:29:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 15:29:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 15:29:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-18 15:29:37,247 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-08-18 15:29:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:37,247 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-18 15:29:37,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:29:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-18 15:29:37,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 15:29:37,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:37,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:37,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:29:37,249 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-08-18 15:29:37,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:37,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354135160] [2020-08-18 15:29:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 15:29:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:37,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354135160] [2020-08-18 15:29:37,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:37,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:29:37,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358842831] [2020-08-18 15:29:37,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:29:37,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:29:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:29:37,352 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-18 15:29:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:37,430 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-18 15:29:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:29:37,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 15:29:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:37,431 INFO L225 Difference]: With dead ends: 44 [2020-08-18 15:29:37,431 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 15:29:37,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:29:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 15:29:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-18 15:29:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 15:29:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-18 15:29:37,438 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-08-18 15:29:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:37,439 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-18 15:29:37,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:29:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-18 15:29:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 15:29:37,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:37,440 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:37,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:29:37,440 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-08-18 15:29:37,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:37,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725040134] [2020-08-18 15:29:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 15:29:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:37,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725040134] [2020-08-18 15:29:37,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:37,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:29:37,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738762434] [2020-08-18 15:29:37,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:29:37,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:29:37,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:29:37,579 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-08-18 15:29:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:37,654 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-08-18 15:29:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:29:37,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-18 15:29:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:37,655 INFO L225 Difference]: With dead ends: 46 [2020-08-18 15:29:37,655 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 15:29:37,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:29:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 15:29:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 15:29:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 15:29:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 15:29:37,662 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-08-18 15:29:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:37,662 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 15:29:37,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:29:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 15:29:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 15:29:37,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:37,663 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:37,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:29:37,664 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-08-18 15:29:37,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:37,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487848180] [2020-08-18 15:29:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 15:29:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:37,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487848180] [2020-08-18 15:29:37,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:37,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:29:37,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069704436] [2020-08-18 15:29:37,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:29:37,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:37,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:29:37,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:29:37,786 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 15:29:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:37,881 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-18 15:29:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:29:37,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-18 15:29:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:37,883 INFO L225 Difference]: With dead ends: 48 [2020-08-18 15:29:37,883 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 15:29:37,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:29:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 15:29:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-18 15:29:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 15:29:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-18 15:29:37,891 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-08-18 15:29:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:37,891 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-18 15:29:37,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:29:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-18 15:29:37,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 15:29:37,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:37,893 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:37,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:29:37,893 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-08-18 15:29:37,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:37,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402660420] [2020-08-18 15:29:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 15:29:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:38,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402660420] [2020-08-18 15:29:38,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:38,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 15:29:38,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784280629] [2020-08-18 15:29:38,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 15:29:38,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 15:29:38,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:29:38,022 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-08-18 15:29:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:38,092 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-18 15:29:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 15:29:38,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-18 15:29:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:38,093 INFO L225 Difference]: With dead ends: 50 [2020-08-18 15:29:38,093 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 15:29:38,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:29:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 15:29:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-18 15:29:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 15:29:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-18 15:29:38,099 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-08-18 15:29:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:38,100 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-18 15:29:38,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 15:29:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-18 15:29:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 15:29:38,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:38,101 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:38,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:29:38,101 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-08-18 15:29:38,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:38,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391088824] [2020-08-18 15:29:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 15:29:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:38,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391088824] [2020-08-18 15:29:38,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:38,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 15:29:38,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414350314] [2020-08-18 15:29:38,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 15:29:38,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:38,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 15:29:38,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:29:38,241 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-08-18 15:29:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:38,344 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-08-18 15:29:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 15:29:38,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-18 15:29:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:38,346 INFO L225 Difference]: With dead ends: 52 [2020-08-18 15:29:38,346 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 15:29:38,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:29:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 15:29:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 15:29:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 15:29:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 15:29:38,354 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-08-18 15:29:38,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:38,356 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 15:29:38,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 15:29:38,357 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 15:29:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 15:29:38,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:38,358 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:38,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:29:38,358 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-08-18 15:29:38,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:38,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70127885] [2020-08-18 15:29:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 15:29:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:38,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70127885] [2020-08-18 15:29:38,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:38,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 15:29:38,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022359991] [2020-08-18 15:29:38,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 15:29:38,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:38,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 15:29:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:29:38,561 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-08-18 15:29:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:38,671 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-18 15:29:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 15:29:38,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-18 15:29:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:38,673 INFO L225 Difference]: With dead ends: 54 [2020-08-18 15:29:38,673 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 15:29:38,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:29:38,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 15:29:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-18 15:29:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 15:29:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-08-18 15:29:38,679 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-08-18 15:29:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:38,680 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-08-18 15:29:38,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 15:29:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-08-18 15:29:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 15:29:38,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:38,681 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:38,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:29:38,681 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:38,682 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-08-18 15:29:38,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:38,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025608836] [2020-08-18 15:29:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 15:29:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:38,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025608836] [2020-08-18 15:29:38,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:38,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 15:29:38,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482690491] [2020-08-18 15:29:38,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 15:29:38,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:38,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 15:29:38,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-18 15:29:38,866 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-08-18 15:29:38,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:38,955 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-08-18 15:29:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 15:29:38,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-18 15:29:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:38,956 INFO L225 Difference]: With dead ends: 56 [2020-08-18 15:29:38,956 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 15:29:38,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-18 15:29:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 15:29:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-18 15:29:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 15:29:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-18 15:29:38,967 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-08-18 15:29:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:38,968 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-18 15:29:38,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 15:29:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-18 15:29:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 15:29:38,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:38,971 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:38,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:29:38,971 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:38,972 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-08-18 15:29:38,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:38,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278148961] [2020-08-18 15:29:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 15:29:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:39,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278148961] [2020-08-18 15:29:39,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:39,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 15:29:39,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917752006] [2020-08-18 15:29:39,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 15:29:39,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 15:29:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-18 15:29:39,155 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-08-18 15:29:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:39,232 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-18 15:29:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 15:29:39,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-08-18 15:29:39,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:39,234 INFO L225 Difference]: With dead ends: 58 [2020-08-18 15:29:39,234 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 15:29:39,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-18 15:29:39,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 15:29:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-18 15:29:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 15:29:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 15:29:39,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-08-18 15:29:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:39,239 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 15:29:39,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 15:29:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 15:29:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 15:29:39,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:39,241 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:39,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:29:39,241 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-08-18 15:29:39,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:39,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658919651] [2020-08-18 15:29:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:29:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:39,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658919651] [2020-08-18 15:29:39,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:39,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 15:29:39,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870733591] [2020-08-18 15:29:39,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 15:29:39,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 15:29:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-18 15:29:39,416 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-18 15:29:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:39,556 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-18 15:29:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 15:29:39,557 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-18 15:29:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:39,558 INFO L225 Difference]: With dead ends: 60 [2020-08-18 15:29:39,558 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 15:29:39,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-18 15:29:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 15:29:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-18 15:29:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-18 15:29:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-08-18 15:29:39,575 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-08-18 15:29:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:39,575 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-08-18 15:29:39,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 15:29:39,578 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-08-18 15:29:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 15:29:39,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:39,579 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:39,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 15:29:39,580 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-08-18 15:29:39,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:39,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235135520] [2020-08-18 15:29:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 15:29:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:39,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235135520] [2020-08-18 15:29:39,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:39,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 15:29:39,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120684808] [2020-08-18 15:29:39,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 15:29:39,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:39,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 15:29:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:29:39,841 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-08-18 15:29:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:39,939 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-08-18 15:29:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 15:29:39,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-08-18 15:29:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:39,941 INFO L225 Difference]: With dead ends: 62 [2020-08-18 15:29:39,941 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 15:29:39,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:29:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 15:29:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-18 15:29:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 15:29:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-18 15:29:39,951 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-08-18 15:29:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:39,955 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-18 15:29:39,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 15:29:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-18 15:29:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 15:29:39,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:39,959 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:39,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 15:29:39,959 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-08-18 15:29:39,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:39,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9393741] [2020-08-18 15:29:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 15:29:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:40,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9393741] [2020-08-18 15:29:40,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:40,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 15:29:40,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459854161] [2020-08-18 15:29:40,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 15:29:40,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:40,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 15:29:40,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:29:40,197 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-08-18 15:29:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:40,290 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-08-18 15:29:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 15:29:40,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-08-18 15:29:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:40,292 INFO L225 Difference]: With dead ends: 64 [2020-08-18 15:29:40,292 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 15:29:40,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:29:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 15:29:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-18 15:29:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 15:29:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 15:29:40,301 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-08-18 15:29:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:40,303 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 15:29:40,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 15:29:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 15:29:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 15:29:40,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:40,304 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:40,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 15:29:40,305 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-08-18 15:29:40,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:40,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485477587] [2020-08-18 15:29:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 15:29:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:40,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485477587] [2020-08-18 15:29:40,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:40,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 15:29:40,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171702465] [2020-08-18 15:29:40,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 15:29:40,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:40,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 15:29:40,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-18 15:29:40,586 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-08-18 15:29:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:40,684 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-18 15:29:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 15:29:40,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-08-18 15:29:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:40,686 INFO L225 Difference]: With dead ends: 66 [2020-08-18 15:29:40,686 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 15:29:40,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-18 15:29:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 15:29:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-18 15:29:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-18 15:29:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-18 15:29:40,691 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-08-18 15:29:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:40,692 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-18 15:29:40,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 15:29:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-18 15:29:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 15:29:40,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:40,693 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:40,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 15:29:40,693 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:40,693 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-08-18 15:29:40,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:40,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962242954] [2020-08-18 15:29:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 15:29:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:40,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962242954] [2020-08-18 15:29:40,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:40,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 15:29:40,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267939347] [2020-08-18 15:29:40,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 15:29:40,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 15:29:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:29:40,955 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-08-18 15:29:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:41,101 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-08-18 15:29:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 15:29:41,102 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-08-18 15:29:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:41,103 INFO L225 Difference]: With dead ends: 68 [2020-08-18 15:29:41,103 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 15:29:41,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:29:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 15:29:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-18 15:29:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 15:29:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-18 15:29:41,108 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-08-18 15:29:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:41,109 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-18 15:29:41,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 15:29:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-18 15:29:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 15:29:41,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:41,110 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:41,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 15:29:41,110 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-08-18 15:29:41,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:41,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90801059] [2020-08-18 15:29:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:41,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:41,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 15:29:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:41,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90801059] [2020-08-18 15:29:41,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:41,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 15:29:41,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71247229] [2020-08-18 15:29:41,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 15:29:41,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 15:29:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-18 15:29:41,404 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-08-18 15:29:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:41,509 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-08-18 15:29:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 15:29:41,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-08-18 15:29:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:41,511 INFO L225 Difference]: With dead ends: 70 [2020-08-18 15:29:41,511 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 15:29:41,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-18 15:29:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 15:29:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-18 15:29:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 15:29:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 15:29:41,521 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-08-18 15:29:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:41,522 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 15:29:41,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 15:29:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 15:29:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 15:29:41,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:41,523 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:41,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 15:29:41,524 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-08-18 15:29:41,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:41,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186592310] [2020-08-18 15:29:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:41,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:41,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 15:29:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:41,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186592310] [2020-08-18 15:29:41,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:29:41,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 15:29:41,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765457814] [2020-08-18 15:29:41,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 15:29:41,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 15:29:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-18 15:29:41,862 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-08-18 15:29:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:42,009 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-08-18 15:29:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 15:29:42,009 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-08-18 15:29:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:42,010 INFO L225 Difference]: With dead ends: 71 [2020-08-18 15:29:42,010 INFO L226 Difference]: Without dead ends: 59 [2020-08-18 15:29:42,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-18 15:29:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-18 15:29:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-18 15:29:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 15:29:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-08-18 15:29:42,015 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-08-18 15:29:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:42,016 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-08-18 15:29:42,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 15:29:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-08-18 15:29:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 15:29:42,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:42,017 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:42,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 15:29:42,017 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-08-18 15:29:42,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:42,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165438526] [2020-08-18 15:29:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 15:29:42,114 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 15:29:42,115 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 15:29:42,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 15:29:42,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:29:42 BoogieIcfgContainer [2020-08-18 15:29:42,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:29:42,147 INFO L168 Benchmark]: Toolchain (without parser) took 7182.46 ms. Allocated memory was 141.0 MB in the beginning and 297.3 MB in the end (delta: 156.2 MB). Free memory was 103.8 MB in the beginning and 137.9 MB in the end (delta: -34.1 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:42,148 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 15:29:42,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.62 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.6 MB in the beginning and 182.8 MB in the end (delta: -79.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:42,149 INFO L168 Benchmark]: Boogie Preprocessor took 38.81 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 180.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:42,150 INFO L168 Benchmark]: RCFGBuilder took 315.94 ms. Allocated memory is still 203.9 MB. Free memory was 180.5 MB in the beginning and 165.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:42,150 INFO L168 Benchmark]: TraceAbstraction took 6460.53 ms. Allocated memory was 203.9 MB in the beginning and 297.3 MB in the end (delta: 93.3 MB). Free memory was 164.6 MB in the beginning and 137.9 MB in the end (delta: 26.7 MB). Peak memory consumption was 120.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:42,153 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.62 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.6 MB in the beginning and 182.8 MB in the end (delta: -79.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.81 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 180.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.94 ms. Allocated memory is still 203.9 MB. Free memory was 180.5 MB in the beginning and 165.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6460.53 ms. Allocated memory was 203.9 MB in the beginning and 297.3 MB in the end (delta: 93.3 MB). Free memory was 164.6 MB in the beginning and 137.9 MB in the end (delta: 26.7 MB). Peak memory consumption was 120.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.3s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 1934 SDs, 0 SdLazy, 1339 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 69580 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2470 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...