/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:07:36,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:07:36,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:07:36,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 14:07:36,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:07:36,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:07:36,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:07:36,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:07:36,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:07:36,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:07:36,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:07:36,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:07:36,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:07:36,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:07:36,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:07:36,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:07:36,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:07:36,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:07:36,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:07:36,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:07:36,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:07:36,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:07:36,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:07:36,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:07:36,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:07:36,814 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:07:36,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:07:36,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:07:36,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:07:36,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:07:36,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:07:36,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:07:36,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:07:36,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:07:36,817 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:07:36,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:07:36,818 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:07:36,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:07:36,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:07:36,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:07:36,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:07:36,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:07:36,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:36,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:07:36,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:07:36,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:07:36,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:07:36,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:07:36,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:07:36,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:07:36,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> log-additional-information=true; [2020-08-21 14:07:37,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:07:37,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:07:37,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:07:37,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:07:37,144 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:07:37,145 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 14:07:37,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/213e47a42/0d238f3062a7487d883fa30e52738b56/FLAGef8db9c8a [2020-08-21 14:07:37,636 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:07:37,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 14:07:37,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/213e47a42/0d238f3062a7487d883fa30e52738b56/FLAGef8db9c8a [2020-08-21 14:07:38,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/213e47a42/0d238f3062a7487d883fa30e52738b56 [2020-08-21 14:07:38,069 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:07:38,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:07:38,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:38,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:07:38,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:07:38,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709958c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38, skipping insertion in model container [2020-08-21 14:07:38,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:07:38,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:07:38,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:38,393 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:07:38,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:38,432 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:07:38,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38 WrapperNode [2020-08-21 14:07:38,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:38,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:07:38,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:07:38,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:07:38,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (1/1) ... [2020-08-21 14:07:38,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:07:38,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:07:38,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:07:38,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:07:38,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:07:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:07:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:07:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:07:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:07:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:07:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:07:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:07:39,048 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:07:39,048 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:07:39,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:39 BoogieIcfgContainer [2020-08-21 14:07:39,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:07:39,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:07:39,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:07:39,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:07:39,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:07:38" (1/3) ... [2020-08-21 14:07:39,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f14985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:39, skipping insertion in model container [2020-08-21 14:07:39,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:38" (2/3) ... [2020-08-21 14:07:39,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f14985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:39, skipping insertion in model container [2020-08-21 14:07:39,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:39" (3/3) ... [2020-08-21 14:07:39,062 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-21 14:07:39,075 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:07:39,084 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:07:39,101 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:07:39,129 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:07:39,129 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:07:39,129 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:07:39,129 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:07:39,130 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:07:39,130 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:07:39,130 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:07:39,130 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:07:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-21 14:07:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:07:39,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,160 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] [2020-08-21 14:07:39,160 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-21 14:07:39,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:39,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116548992] [2020-08-21 14:07:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:39,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116548992] [2020-08-21 14:07:39,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:39,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:39,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517350854] [2020-08-21 14:07:39,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:39,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:39,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:39,485 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-21 14:07:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:39,553 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-21 14:07:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:39,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:07:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:39,569 INFO L225 Difference]: With dead ends: 87 [2020-08-21 14:07:39,570 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 14:07:39,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 14:07:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-21 14:07:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 14:07:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-21 14:07:39,631 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-21 14:07:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:39,632 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-21 14:07:39,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-21 14:07:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:07:39,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,634 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] [2020-08-21 14:07:39,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:07:39,635 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-21 14:07:39,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:39,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870478807] [2020-08-21 14:07:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:39,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870478807] [2020-08-21 14:07:39,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:39,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:39,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237060086] [2020-08-21 14:07:39,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:39,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:39,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:39,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:39,708 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-21 14:07:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:39,752 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-21 14:07:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:39,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:07:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:39,756 INFO L225 Difference]: With dead ends: 117 [2020-08-21 14:07:39,758 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 14:07:39,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 14:07:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-21 14:07:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 14:07:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-21 14:07:39,788 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-21 14:07:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:39,789 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-21 14:07:39,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-21 14:07:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:07:39,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,791 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, 1] [2020-08-21 14:07:39,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:07:39,791 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-21 14:07:39,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:39,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83782745] [2020-08-21 14:07:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:39,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83782745] [2020-08-21 14:07:39,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:39,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:39,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778854032] [2020-08-21 14:07:39,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:39,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:39,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:39,908 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-21 14:07:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:39,946 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-21 14:07:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:39,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:07:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:39,949 INFO L225 Difference]: With dead ends: 108 [2020-08-21 14:07:39,949 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 14:07:39,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 14:07:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-21 14:07:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 14:07:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-21 14:07:39,965 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-21 14:07:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:39,965 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-21 14:07:39,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-21 14:07:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:07:39,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,967 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, 1] [2020-08-21 14:07:39,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:07:39,967 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,968 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-21 14:07:39,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:39,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387051938] [2020-08-21 14:07:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387051938] [2020-08-21 14:07:40,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189100420] [2020-08-21 14:07:40,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,012 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-21 14:07:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,031 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-21 14:07:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:07:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,033 INFO L225 Difference]: With dead ends: 136 [2020-08-21 14:07:40,034 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 14:07:40,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 14:07:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-21 14:07:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 14:07:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-21 14:07:40,046 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-21 14:07:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,046 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-21 14:07:40,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-21 14:07:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:07:40,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,048 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, 1] [2020-08-21 14:07:40,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:07:40,048 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-21 14:07:40,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962397882] [2020-08-21 14:07:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962397882] [2020-08-21 14:07:40,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080465878] [2020-08-21 14:07:40,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,097 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-21 14:07:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,119 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-21 14:07:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:07:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,122 INFO L225 Difference]: With dead ends: 224 [2020-08-21 14:07:40,122 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 14:07:40,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 14:07:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-21 14:07:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 14:07:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-21 14:07:40,139 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-21 14:07:40,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,139 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-21 14:07:40,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-21 14:07:40,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:40,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,142 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, 1, 1] [2020-08-21 14:07:40,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:07:40,142 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-21 14:07:40,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615234421] [2020-08-21 14:07:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615234421] [2020-08-21 14:07:40,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666859630] [2020-08-21 14:07:40,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,200 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-21 14:07:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,221 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-21 14:07:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,224 INFO L225 Difference]: With dead ends: 201 [2020-08-21 14:07:40,224 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 14:07:40,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 14:07:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 14:07:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 14:07:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-21 14:07:40,238 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-21 14:07:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,238 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-21 14:07:40,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-21 14:07:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:40,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,256 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, 1, 1] [2020-08-21 14:07:40,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:07:40,256 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-21 14:07:40,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346299264] [2020-08-21 14:07:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346299264] [2020-08-21 14:07:40,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292311560] [2020-08-21 14:07:40,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,297 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-21 14:07:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,315 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-21 14:07:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,318 INFO L225 Difference]: With dead ends: 252 [2020-08-21 14:07:40,318 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 14:07:40,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 14:07:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-21 14:07:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 14:07:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-21 14:07:40,334 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-21 14:07:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,334 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-21 14:07:40,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-21 14:07:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:40,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,336 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, 1, 1] [2020-08-21 14:07:40,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:07:40,337 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-21 14:07:40,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169740403] [2020-08-21 14:07:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169740403] [2020-08-21 14:07:40,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417356471] [2020-08-21 14:07:40,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,365 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-21 14:07:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,391 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-21 14:07:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,394 INFO L225 Difference]: With dead ends: 432 [2020-08-21 14:07:40,394 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 14:07:40,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 14:07:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 14:07:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 14:07:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-21 14:07:40,413 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-21 14:07:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,413 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-21 14:07:40,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-21 14:07:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:40,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,415 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, 1, 1, 1] [2020-08-21 14:07:40,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:07:40,416 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-21 14:07:40,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460212140] [2020-08-21 14:07:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460212140] [2020-08-21 14:07:40,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290909779] [2020-08-21 14:07:40,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,444 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-21 14:07:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,465 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-21 14:07:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,467 INFO L225 Difference]: With dead ends: 384 [2020-08-21 14:07:40,467 INFO L226 Difference]: Without dead ends: 262 [2020-08-21 14:07:40,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-21 14:07:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-21 14:07:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-21 14:07:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-21 14:07:40,480 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-21 14:07:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,480 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-21 14:07:40,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-21 14:07:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:40,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,482 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, 1, 1, 1] [2020-08-21 14:07:40,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:07:40,483 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-21 14:07:40,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393251117] [2020-08-21 14:07:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393251117] [2020-08-21 14:07:40,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234420764] [2020-08-21 14:07:40,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,511 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-21 14:07:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,530 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-21 14:07:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,533 INFO L225 Difference]: With dead ends: 476 [2020-08-21 14:07:40,533 INFO L226 Difference]: Without dead ends: 474 [2020-08-21 14:07:40,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-21 14:07:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-21 14:07:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 14:07:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-21 14:07:40,547 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-21 14:07:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,547 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-21 14:07:40,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-21 14:07:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:40,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,549 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, 1, 1, 1] [2020-08-21 14:07:40,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:07:40,550 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,550 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-21 14:07:40,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402950326] [2020-08-21 14:07:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402950326] [2020-08-21 14:07:40,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606047334] [2020-08-21 14:07:40,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,575 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-21 14:07:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,598 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-21 14:07:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,601 INFO L225 Difference]: With dead ends: 844 [2020-08-21 14:07:40,601 INFO L226 Difference]: Without dead ends: 498 [2020-08-21 14:07:40,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-21 14:07:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-21 14:07:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-21 14:07:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-21 14:07:40,620 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-21 14:07:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,620 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-21 14:07:40,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-21 14:07:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:40,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,622 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, 1, 1, 1, 1] [2020-08-21 14:07:40,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:07:40,622 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,623 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-21 14:07:40,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583022938] [2020-08-21 14:07:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583022938] [2020-08-21 14:07:40,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821654742] [2020-08-21 14:07:40,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,647 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-21 14:07:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,686 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-21 14:07:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,690 INFO L225 Difference]: With dead ends: 744 [2020-08-21 14:07:40,691 INFO L226 Difference]: Without dead ends: 506 [2020-08-21 14:07:40,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-21 14:07:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-21 14:07:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-21 14:07:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-21 14:07:40,716 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-21 14:07:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,716 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-21 14:07:40,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,717 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-21 14:07:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:40,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,718 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, 1, 1, 1, 1] [2020-08-21 14:07:40,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:07:40,719 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-21 14:07:40,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952237866] [2020-08-21 14:07:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952237866] [2020-08-21 14:07:40,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783070114] [2020-08-21 14:07:40,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,778 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-21 14:07:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,816 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-21 14:07:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,824 INFO L225 Difference]: With dead ends: 908 [2020-08-21 14:07:40,824 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 14:07:40,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 14:07:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-21 14:07:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-21 14:07:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-21 14:07:40,850 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-21 14:07:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,851 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-21 14:07:40,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-21 14:07:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:40,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,856 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, 1, 1, 1, 1] [2020-08-21 14:07:40,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:07:40,856 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-21 14:07:40,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819581856] [2020-08-21 14:07:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:40,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819581856] [2020-08-21 14:07:40,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926766914] [2020-08-21 14:07:40,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,898 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-21 14:07:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,936 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-21 14:07:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,943 INFO L225 Difference]: With dead ends: 1660 [2020-08-21 14:07:40,943 INFO L226 Difference]: Without dead ends: 970 [2020-08-21 14:07:40,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-21 14:07:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-21 14:07:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-21 14:07:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-21 14:07:40,980 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-21 14:07:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,980 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-21 14:07:40,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,982 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-21 14:07:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:40,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,984 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, 1, 1, 1, 1, 1] [2020-08-21 14:07:40,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:07:40,984 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-21 14:07:40,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110486218] [2020-08-21 14:07:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:41,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110486218] [2020-08-21 14:07:41,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534993318] [2020-08-21 14:07:41,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,030 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-21 14:07:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,082 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-21 14:07:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,087 INFO L225 Difference]: With dead ends: 1452 [2020-08-21 14:07:41,088 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 14:07:41,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 14:07:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-21 14:07:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-21 14:07:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-21 14:07:41,115 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-21 14:07:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,116 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-21 14:07:41,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-21 14:07:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:41,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,118 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, 1, 1, 1, 1, 1] [2020-08-21 14:07:41,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:07:41,118 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-21 14:07:41,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832261183] [2020-08-21 14:07:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:41,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832261183] [2020-08-21 14:07:41,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6784829] [2020-08-21 14:07:41,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,143 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-21 14:07:41,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,171 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-21 14:07:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:41,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,180 INFO L225 Difference]: With dead ends: 1740 [2020-08-21 14:07:41,181 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 14:07:41,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 14:07:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-21 14:07:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-21 14:07:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-21 14:07:41,220 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-21 14:07:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,221 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-21 14:07:41,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-21 14:07:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:41,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,224 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, 1, 1, 1, 1, 1] [2020-08-21 14:07:41,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:07:41,224 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-21 14:07:41,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386364555] [2020-08-21 14:07:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:41,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386364555] [2020-08-21 14:07:41,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307070959] [2020-08-21 14:07:41,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,245 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-21 14:07:41,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,285 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-21 14:07:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,294 INFO L225 Difference]: With dead ends: 3276 [2020-08-21 14:07:41,294 INFO L226 Difference]: Without dead ends: 1898 [2020-08-21 14:07:41,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-21 14:07:41,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-21 14:07:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-21 14:07:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-21 14:07:41,349 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-21 14:07:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,350 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-21 14:07:41,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-21 14:07:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:41,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,353 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, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:41,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:07:41,353 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-21 14:07:41,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20247485] [2020-08-21 14:07:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:41,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20247485] [2020-08-21 14:07:41,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673298430] [2020-08-21 14:07:41,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,379 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-21 14:07:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,415 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-21 14:07:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,425 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 14:07:41,425 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 14:07:41,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 14:07:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-21 14:07:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-21 14:07:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-21 14:07:41,486 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-21 14:07:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,486 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-21 14:07:41,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-21 14:07:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:41,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,490 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, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:41,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:07:41,490 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-21 14:07:41,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717882790] [2020-08-21 14:07:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:41,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717882790] [2020-08-21 14:07:41,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478927318] [2020-08-21 14:07:41,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,515 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-21 14:07:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,594 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-21 14:07:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,610 INFO L225 Difference]: With dead ends: 3340 [2020-08-21 14:07:41,610 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 14:07:41,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 14:07:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-21 14:07:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-21 14:07:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-21 14:07:41,689 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-21 14:07:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,690 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-21 14:07:41,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-21 14:07:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:41,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,695 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, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:41,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:07:41,696 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-21 14:07:41,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516768969] [2020-08-21 14:07:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:41,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516768969] [2020-08-21 14:07:41,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191595293] [2020-08-21 14:07:41,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,721 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-21 14:07:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,794 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-21 14:07:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,816 INFO L225 Difference]: With dead ends: 6476 [2020-08-21 14:07:41,816 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 14:07:41,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 14:07:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-21 14:07:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-21 14:07:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-21 14:07:41,937 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-21 14:07:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,937 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-21 14:07:41,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-21 14:07:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:07:41,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,943 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:41,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:07:41,944 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-21 14:07:41,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309048436] [2020-08-21 14:07:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:41,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309048436] [2020-08-21 14:07:41,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859235789] [2020-08-21 14:07:41,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,968 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-21 14:07:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,064 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-21 14:07:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 14:07:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,082 INFO L225 Difference]: With dead ends: 5580 [2020-08-21 14:07:42,082 INFO L226 Difference]: Without dead ends: 3786 [2020-08-21 14:07:42,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-21 14:07:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-21 14:07:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-21 14:07:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-21 14:07:42,185 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-21 14:07:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,185 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-21 14:07:42,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-21 14:07:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:07:42,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,190 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:42,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:07:42,191 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-21 14:07:42,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660363387] [2020-08-21 14:07:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:42,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660363387] [2020-08-21 14:07:42,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949105446] [2020-08-21 14:07:42,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,217 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-21 14:07:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,318 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-21 14:07:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 14:07:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,357 INFO L225 Difference]: With dead ends: 10956 [2020-08-21 14:07:42,357 INFO L226 Difference]: Without dead ends: 7306 [2020-08-21 14:07:42,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-21 14:07:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-21 14:07:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 14:07:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-21 14:07:42,557 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-21 14:07:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,557 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-21 14:07:42,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-21 14:07:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:07:42,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,567 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:42,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:07:42,568 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-21 14:07:42,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600473615] [2020-08-21 14:07:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:42,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600473615] [2020-08-21 14:07:42,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861338242] [2020-08-21 14:07:42,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,601 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-21 14:07:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,741 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-21 14:07:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 14:07:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,763 INFO L225 Difference]: With dead ends: 8076 [2020-08-21 14:07:42,763 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 14:07:42,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 14:07:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-21 14:07:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 14:07:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-21 14:07:42,931 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-21 14:07:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,931 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-21 14:07:42,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-21 14:07:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:07:42,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,946 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:42,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:07:42,946 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,947 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-21 14:07:42,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007584399] [2020-08-21 14:07:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:42,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007584399] [2020-08-21 14:07:42,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140870723] [2020-08-21 14:07:42,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,985 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-21 14:07:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:43,151 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-21 14:07:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:43,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 14:07:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:43,173 INFO L225 Difference]: With dead ends: 12172 [2020-08-21 14:07:43,173 INFO L226 Difference]: Without dead ends: 12170 [2020-08-21 14:07:43,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-21 14:07:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-21 14:07:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-21 14:07:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-21 14:07:43,379 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-21 14:07:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:43,379 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-21 14:07:43,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-21 14:07:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:07:43,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:43,397 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:43,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 14:07:43,398 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-21 14:07:43,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:43,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510612816] [2020-08-21 14:07:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:43,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510612816] [2020-08-21 14:07:43,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:43,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:43,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314872988] [2020-08-21 14:07:43,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:43,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:43,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:43,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:43,430 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-21 14:07:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:43,598 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-21 14:07:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:43,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 14:07:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:43,627 INFO L225 Difference]: With dead ends: 25228 [2020-08-21 14:07:43,627 INFO L226 Difference]: Without dead ends: 14218 [2020-08-21 14:07:43,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-21 14:07:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-21 14:07:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-21 14:07:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-21 14:07:44,058 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-21 14:07:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,058 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-21 14:07:44,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-21 14:07:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 14:07:44,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,077 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:44,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 14:07:44,077 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-21 14:07:44,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960717848] [2020-08-21 14:07:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:44,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960717848] [2020-08-21 14:07:44,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509308394] [2020-08-21 14:07:44,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,108 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-21 14:07:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,272 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-21 14:07:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:44,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 14:07:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,301 INFO L225 Difference]: With dead ends: 21516 [2020-08-21 14:07:44,301 INFO L226 Difference]: Without dead ends: 14602 [2020-08-21 14:07:44,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-21 14:07:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-21 14:07:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-21 14:07:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-21 14:07:44,746 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-21 14:07:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,746 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-21 14:07:44,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-21 14:07:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 14:07:44,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:44,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 14:07:44,764 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-21 14:07:44,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864297590] [2020-08-21 14:07:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:44,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864297590] [2020-08-21 14:07:44,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888836619] [2020-08-21 14:07:44,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,789 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-21 14:07:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,128 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-21 14:07:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 14:07:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,175 INFO L225 Difference]: With dead ends: 23562 [2020-08-21 14:07:45,176 INFO L226 Difference]: Without dead ends: 23560 [2020-08-21 14:07:45,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-21 14:07:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-21 14:07:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-21 14:07:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-21 14:07:45,796 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-21 14:07:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,796 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-21 14:07:45,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-21 14:07:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 14:07:45,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 14:07:45,829 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-21 14:07:45,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444835441] [2020-08-21 14:07:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444835441] [2020-08-21 14:07:45,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33014690] [2020-08-21 14:07:45,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,851 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-21 14:07:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:46,809 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-21 14:07:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:46,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 14:07:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:46,811 INFO L225 Difference]: With dead ends: 50184 [2020-08-21 14:07:46,811 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:07:46,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:07:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:07:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:07:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:07:46,873 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-21 14:07:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:46,873 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:07:46,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:07:46,873 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:07:46,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 14:07:46,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:07:46,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:07:46,906 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:46,906 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:46,906 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:07:46,906 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:07:46,906 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:07:46,906 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-21 14:07:46,907 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-21 14:07:46,907 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,907 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,907 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,907 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,907 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-21 14:07:46,907 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,907 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-21 14:07:46,908 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,908 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,908 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,908 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-21 14:07:46,908 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-21 14:07:46,908 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-21 14:07:46,908 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-21 14:07:46,909 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-21 14:07:46,909 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-21 14:07:46,909 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-21 14:07:46,909 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,909 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,909 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-21 14:07:46,909 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-21 14:07:46,909 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,910 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,910 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,910 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,910 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,910 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 14:07:46,910 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,910 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-21 14:07:46,910 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,911 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-21 14:07:46,911 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-21 14:07:46,911 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,911 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 14:07:46,911 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-21 14:07:46,911 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-21 14:07:46,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:07:46 BoogieIcfgContainer [2020-08-21 14:07:46,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:07:46,927 INFO L168 Benchmark]: Toolchain (without parser) took 8854.36 ms. Allocated memory was 140.5 MB in the beginning and 658.5 MB in the end (delta: 518.0 MB). Free memory was 104.0 MB in the beginning and 543.8 MB in the end (delta: -439.8 MB). Peak memory consumption was 78.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:46,928 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 14:07:46,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.08 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:46,929 INFO L168 Benchmark]: Boogie Preprocessor took 125.99 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 180.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:46,929 INFO L168 Benchmark]: RCFGBuilder took 492.70 ms. Allocated memory is still 202.9 MB. Free memory was 180.8 MB in the beginning and 160.9 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:46,930 INFO L168 Benchmark]: TraceAbstraction took 7869.69 ms. Allocated memory was 202.9 MB in the beginning and 658.5 MB in the end (delta: 455.6 MB). Free memory was 160.9 MB in the beginning and 543.8 MB in the end (delta: -382.9 MB). Peak memory consumption was 72.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:46,932 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 360.08 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.99 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 180.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 492.70 ms. Allocated memory is still 202.9 MB. Free memory was 180.8 MB in the beginning and 160.9 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7869.69 ms. Allocated memory was 202.9 MB in the beginning and 658.5 MB in the end (delta: 455.6 MB). Free memory was 160.9 MB in the beginning and 543.8 MB in the end (delta: -382.9 MB). Peak memory consumption was 72.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.7s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...