/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_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:07:37,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:07:37,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:07:37,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 14:07:37,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:07:37,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:07:37,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:07:37,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:07:37,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:07:37,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:07:37,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:07:37,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:07:37,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:07:37,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:07:37,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:07:37,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:07:37,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:07:37,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:07:37,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:07:37,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:07:37,870 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 14:07:37,891 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:07:37,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:07:37,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:07:37,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:07:37,893 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:07:37,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:07:37,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:07:37,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:07:37,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:07:37,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:07:37,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:07:37,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:07:37,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:07:37,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:07:37,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:07:37,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:07:37,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:07:37,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:07:37,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:07:37,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:07:37,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:07:37,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:37,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:07:37,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:07:37,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:07:37,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:07:37,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:07:37,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:07:37,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:07:37,898 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 14:07:38,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:07:38,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:07:38,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:07:38,210 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:07:38,210 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:07:38,211 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 14:07:38,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f62586b62/6f837e2a07e64aab8a6df82f43207b2b/FLAG8f6443ed5 [2020-08-21 14:07:38,673 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:07:38,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 14:07:38,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f62586b62/6f837e2a07e64aab8a6df82f43207b2b/FLAG8f6443ed5 [2020-08-21 14:07:39,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f62586b62/6f837e2a07e64aab8a6df82f43207b2b [2020-08-21 14:07:39,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:07:39,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:07:39,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:39,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:07:39,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:07:39,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39, skipping insertion in model container [2020-08-21 14:07:39,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:07:39,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:07:39,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:39,320 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:07:39,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:39,360 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:07:39,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39 WrapperNode [2020-08-21 14:07:39,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:39,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:07:39,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:07:39,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:07:39,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (1/1) ... [2020-08-21 14:07:39,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:07:39,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:07:39,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:07:39,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:07:39,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (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 14:07:39,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:07:39,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:07:39,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:07:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:07:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:07:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:07:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:07:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:07:39,841 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:07:39,841 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:07:39,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:39 BoogieIcfgContainer [2020-08-21 14:07:39,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:07:39,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:07:39,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:07:39,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:07:39,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:07:39" (1/3) ... [2020-08-21 14:07:39,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ccf113 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 14:07:39,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:39" (2/3) ... [2020-08-21 14:07:39,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ccf113 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 14:07:39,854 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 14:07:39,856 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-21 14:07:39,883 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:07:39,901 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:07:39,934 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:07:39,965 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:07:39,965 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:07:39,965 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:07:39,965 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:07:39,965 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:07:39,966 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:07:39,966 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:07:39,966 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:07:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-21 14:07:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:07:39,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:39,992 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 14:07:39,993 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-21 14:07:40,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539282129] [2020-08-21 14:07:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,200 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 14:07:40,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539282129] [2020-08-21 14:07:40,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809780502] [2020-08-21 14:07:40,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,227 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-21 14:07:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,291 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-21 14:07:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:07:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,306 INFO L225 Difference]: With dead ends: 93 [2020-08-21 14:07:40,307 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 14:07:40,310 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 14:07:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 14:07:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-21 14:07:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 14:07:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-21 14:07:40,357 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-21 14:07:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,357 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-21 14:07:40,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-21 14:07:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:07:40,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,359 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 14:07:40,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:07:40,360 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-21 14:07:40,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736569221] [2020-08-21 14:07:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,439 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 14:07:40,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736569221] [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 14:07:40,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561192625] [2020-08-21 14:07:40,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,449 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-21 14:07:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,513 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-21 14:07:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:07:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,517 INFO L225 Difference]: With dead ends: 127 [2020-08-21 14:07:40,518 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 14:07:40,520 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 14:07:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 14:07:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 14:07:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 14:07:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-21 14:07:40,541 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-21 14:07:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,541 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-21 14:07:40,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-21 14:07:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:40,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,544 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 14:07:40,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:07:40,545 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-21 14:07:40,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827994882] [2020-08-21 14:07:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,655 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 14:07:40,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827994882] [2020-08-21 14:07:40,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578241129] [2020-08-21 14:07:40,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,660 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-21 14:07:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,688 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-21 14:07:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,690 INFO L225 Difference]: With dead ends: 117 [2020-08-21 14:07:40,690 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 14:07:40,691 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 14:07:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 14:07:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-21 14:07:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 14:07:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-21 14:07:40,700 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-21 14:07:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,701 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-21 14:07:40,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-21 14:07:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:40,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,702 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 14:07:40,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:07:40,703 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-21 14:07:40,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203643290] [2020-08-21 14:07:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,752 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 14:07:40,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203643290] [2020-08-21 14:07:40,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326169507] [2020-08-21 14:07:40,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,756 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-21 14:07:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,778 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-21 14:07:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,781 INFO L225 Difference]: With dead ends: 148 [2020-08-21 14:07:40,781 INFO L226 Difference]: Without dead ends: 146 [2020-08-21 14:07:40,782 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 14:07:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-21 14:07:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-21 14:07:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 14:07:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-21 14:07:40,795 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-21 14:07:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,796 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-21 14:07:40,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-21 14:07:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:40,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,797 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 14:07:40,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:07:40,798 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,798 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-21 14:07:40,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78538166] [2020-08-21 14:07:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,842 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 14:07:40,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78538166] [2020-08-21 14:07:40,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857368348] [2020-08-21 14:07:40,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,844 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-21 14:07:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,874 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-21 14:07:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,877 INFO L225 Difference]: With dead ends: 244 [2020-08-21 14:07:40,877 INFO L226 Difference]: Without dead ends: 148 [2020-08-21 14:07:40,878 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 14:07:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-21 14:07:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-21 14:07:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 14:07:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-21 14:07:40,897 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-21 14:07:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,898 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-21 14:07:40,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-21 14:07:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:40,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,901 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 14:07:40,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:07:40,901 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,902 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-21 14:07:40,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720520317] [2020-08-21 14:07:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:40,938 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 14:07:40,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720520317] [2020-08-21 14:07:40,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:40,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:40,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371670823] [2020-08-21 14:07:40,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:40,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:40,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:40,941 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-21 14:07:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:40,962 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-21 14:07:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:40,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:40,977 INFO L225 Difference]: With dead ends: 219 [2020-08-21 14:07:40,977 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 14:07:40,978 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 14:07:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 14:07:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-21 14:07:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-21 14:07:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-21 14:07:40,994 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-21 14:07:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:40,994 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-21 14:07:40,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-21 14:07:40,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:40,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:40,996 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 14:07:40,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:07:40,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-21 14:07:40,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:40,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440047394] [2020-08-21 14:07:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,030 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 14:07:41,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440047394] [2020-08-21 14:07:41,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560214257] [2020-08-21 14:07:41,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,032 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-21 14:07:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,049 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-21 14:07:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,052 INFO L225 Difference]: With dead ends: 276 [2020-08-21 14:07:41,052 INFO L226 Difference]: Without dead ends: 274 [2020-08-21 14:07:41,053 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 14:07:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-21 14:07:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-21 14:07:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 14:07:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-21 14:07:41,068 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-21 14:07:41,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,068 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-21 14:07:41,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-21 14:07:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:41,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,073 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 14:07:41,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:07:41,077 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-21 14:07:41,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000400460] [2020-08-21 14:07:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,112 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 14:07:41,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000400460] [2020-08-21 14:07:41,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220050983] [2020-08-21 14:07:41,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,114 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-21 14:07:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,136 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-21 14:07:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,139 INFO L225 Difference]: With dead ends: 472 [2020-08-21 14:07:41,139 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 14:07:41,141 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 14:07:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 14:07:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-21 14:07:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-21 14:07:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-21 14:07:41,154 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-21 14:07:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,155 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-21 14:07:41,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-21 14:07:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:41,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,157 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 14:07:41,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:07:41,157 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-21 14:07:41,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362996497] [2020-08-21 14:07:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,185 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 14:07:41,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362996497] [2020-08-21 14:07:41,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316333783] [2020-08-21 14:07:41,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,188 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-21 14:07:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,207 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-21 14:07:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,209 INFO L225 Difference]: With dead ends: 420 [2020-08-21 14:07:41,210 INFO L226 Difference]: Without dead ends: 286 [2020-08-21 14:07:41,211 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 14:07:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-21 14:07:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-21 14:07:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-21 14:07:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-21 14:07:41,222 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-21 14:07:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,223 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-21 14:07:41,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-21 14:07:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:41,224 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] [2020-08-21 14:07:41,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:07:41,224 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, 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 [969072932] [2020-08-21 14:07:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,260 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 14:07:41,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969072932] [2020-08-21 14:07:41,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668119170] [2020-08-21 14:07:41,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,264 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-21 14:07:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,297 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-21 14:07:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,302 INFO L225 Difference]: With dead ends: 524 [2020-08-21 14:07:41,302 INFO L226 Difference]: Without dead ends: 522 [2020-08-21 14:07:41,303 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 14:07:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-21 14:07:41,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-21 14:07:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 14:07:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-21 14:07:41,321 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-21 14:07:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,322 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-21 14:07:41,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-21 14:07:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:41,324 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,324 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 14:07:41,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:07:41,324 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-21 14:07:41,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293647274] [2020-08-21 14:07:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,376 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 14:07:41,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293647274] [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 14:07:41,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683196570] [2020-08-21 14:07:41,377 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 392 states and 654 transitions. Second operand 3 states. [2020-08-21 14:07:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,418 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-21 14:07:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,423 INFO L225 Difference]: With dead ends: 924 [2020-08-21 14:07:41,423 INFO L226 Difference]: Without dead ends: 546 [2020-08-21 14:07:41,424 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 14:07:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-21 14:07:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-21 14:07:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-21 14:07:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-21 14:07:41,447 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-21 14:07:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,447 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-21 14:07:41,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,447 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-21 14:07:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,450 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 14:07:41,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:07:41,451 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-21 14:07:41,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095550634] [2020-08-21 14:07:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,489 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 14:07:41,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095550634] [2020-08-21 14:07:41,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111310053] [2020-08-21 14:07:41,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,492 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-21 14:07:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,519 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-21 14:07:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,523 INFO L225 Difference]: With dead ends: 816 [2020-08-21 14:07:41,523 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 14:07:41,525 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 14:07:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 14:07:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-21 14:07:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-21 14:07:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-21 14:07:41,541 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-21 14:07:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,541 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-21 14:07:41,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-21 14:07:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:41,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,542 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 14:07:41,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:07:41,543 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-21 14:07:41,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955913245] [2020-08-21 14:07:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,598 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 14:07:41,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955913245] [2020-08-21 14:07:41,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835131426] [2020-08-21 14:07:41,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,601 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-21 14:07:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,624 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-21 14:07:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,630 INFO L225 Difference]: With dead ends: 1004 [2020-08-21 14:07:41,631 INFO L226 Difference]: Without dead ends: 1002 [2020-08-21 14:07:41,632 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 14:07:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-21 14:07:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-21 14:07:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 14:07:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-21 14:07:41,660 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-21 14:07:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,660 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-21 14:07:41,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-21 14:07:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:41,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,663 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 14:07:41,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:07:41,664 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-21 14:07:41,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370393161] [2020-08-21 14:07:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,690 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 14:07:41,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370393161] [2020-08-21 14:07:41,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636315539] [2020-08-21 14:07:41,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,693 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-21 14:07:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,726 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-21 14:07:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,732 INFO L225 Difference]: With dead ends: 1820 [2020-08-21 14:07:41,732 INFO L226 Difference]: Without dead ends: 1066 [2020-08-21 14:07:41,734 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 14:07:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-21 14:07:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-21 14:07:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-21 14:07:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-21 14:07:41,767 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-21 14:07:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,767 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-21 14:07:41,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-21 14:07:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:41,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,770 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 14:07:41,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:07:41,770 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,771 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-21 14:07:41,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412342241] [2020-08-21 14:07:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,808 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 14:07:41,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412342241] [2020-08-21 14:07:41,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480789889] [2020-08-21 14:07:41,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,810 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-21 14:07:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,836 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-21 14:07:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,841 INFO L225 Difference]: With dead ends: 1596 [2020-08-21 14:07:41,841 INFO L226 Difference]: Without dead ends: 1082 [2020-08-21 14:07:41,843 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 14:07:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-21 14:07:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-21 14:07:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-21 14:07:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-21 14:07:41,874 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-21 14:07:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,874 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-21 14:07:41,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-21 14:07:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:41,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,876 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 14:07:41,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:07:41,876 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-21 14:07:41,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574253387] [2020-08-21 14:07:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:41,896 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 14:07:41,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574253387] [2020-08-21 14:07:41,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:41,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:41,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863752026] [2020-08-21 14:07:41,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:41,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:41,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:41,898 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-21 14:07:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:41,929 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-21 14:07:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:41,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:41,938 INFO L225 Difference]: With dead ends: 1932 [2020-08-21 14:07:41,939 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 14:07:41,939 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 14:07:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 14:07:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-21 14:07:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 14:07:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-21 14:07:41,992 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-21 14:07:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:41,993 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-21 14:07:41,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-21 14:07:41,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:41,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:41,997 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 14:07:41,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:07:41,998 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-21 14:07:41,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:41,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601575167] [2020-08-21 14:07:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,021 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 14:07:42,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601575167] [2020-08-21 14:07:42,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472665258] [2020-08-21 14:07:42,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,023 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-21 14:07:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,085 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-21 14:07:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,098 INFO L225 Difference]: With dead ends: 3596 [2020-08-21 14:07:42,098 INFO L226 Difference]: Without dead ends: 2090 [2020-08-21 14:07:42,101 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 14:07:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-21 14:07:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-21 14:07:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-21 14:07:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-21 14:07:42,180 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-21 14:07:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,180 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-21 14:07:42,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-21 14:07:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:07:42,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,185 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 14:07:42,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:07:42,185 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-21 14:07:42,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984442773] [2020-08-21 14:07:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,213 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 14:07:42,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984442773] [2020-08-21 14:07:42,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507729861] [2020-08-21 14:07:42,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,218 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-21 14:07:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,279 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-21 14:07:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 14:07:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,294 INFO L225 Difference]: With dead ends: 3132 [2020-08-21 14:07:42,294 INFO L226 Difference]: Without dead ends: 2122 [2020-08-21 14:07:42,299 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 14:07:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-21 14:07:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-21 14:07:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-21 14:07:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-21 14:07:42,369 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-21 14:07:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,369 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-21 14:07:42,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-21 14:07:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:07:42,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,388 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 14:07:42,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:07:42,388 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-21 14:07:42,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092451705] [2020-08-21 14:07:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,415 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 14:07:42,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092451705] [2020-08-21 14:07:42,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944070840] [2020-08-21 14:07:42,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,420 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-21 14:07:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,481 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-21 14:07:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 14:07:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,499 INFO L225 Difference]: With dead ends: 3724 [2020-08-21 14:07:42,499 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 14:07:42,501 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 14:07:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 14:07:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-21 14:07:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-21 14:07:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-21 14:07:42,582 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-21 14:07:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,583 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-21 14:07:42,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-21 14:07:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:07:42,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,589 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 14:07:42,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:07:42,589 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-21 14:07:42,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908346340] [2020-08-21 14:07:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,611 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 14:07:42,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908346340] [2020-08-21 14:07:42,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131342744] [2020-08-21 14:07:42,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,612 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-21 14:07:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,674 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-21 14:07:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 14:07:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,692 INFO L225 Difference]: With dead ends: 7116 [2020-08-21 14:07:42,692 INFO L226 Difference]: Without dead ends: 4106 [2020-08-21 14:07:42,697 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 14:07:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-21 14:07:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-21 14:07:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-21 14:07:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-21 14:07:42,806 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-21 14:07:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:42,806 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-21 14:07:42,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-21 14:07:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:07:42,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:42,811 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 14:07:42,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:07:42,812 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-21 14:07:42,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:42,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930572831] [2020-08-21 14:07:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:42,859 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 14:07:42,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930572831] [2020-08-21 14:07:42,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:42,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:42,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027504808] [2020-08-21 14:07:42,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:42,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:42,860 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-21 14:07:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:42,914 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-21 14:07:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:42,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 14:07:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:42,933 INFO L225 Difference]: With dead ends: 6156 [2020-08-21 14:07:42,933 INFO L226 Difference]: Without dead ends: 4170 [2020-08-21 14:07:42,937 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 14:07:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-21 14:07:43,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-21 14:07:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-21 14:07:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-21 14:07:43,040 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-21 14:07:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:43,040 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-21 14:07:43,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-21 14:07:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:07:43,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:43,045 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 14:07:43,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:07:43,046 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-21 14:07:43,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:43,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004785753] [2020-08-21 14:07:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,069 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 14:07:43,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004785753] [2020-08-21 14:07:43,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:43,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:43,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957147239] [2020-08-21 14:07:43,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:43,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:43,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:43,071 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-21 14:07:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:43,167 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-21 14:07:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:43,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 14:07:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:43,183 INFO L225 Difference]: With dead ends: 12108 [2020-08-21 14:07:43,184 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 14:07:43,195 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 14:07:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 14:07:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-21 14:07:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 14:07:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-21 14:07:43,503 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-21 14:07:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:43,504 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-21 14:07:43,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-21 14:07:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:07:43,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:43,513 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 14:07:43,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:07:43,514 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-21 14:07:43,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:43,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32596380] [2020-08-21 14:07:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:43,555 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 14:07:43,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32596380] [2020-08-21 14:07:43,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:43,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:43,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814052422] [2020-08-21 14:07:43,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:43,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:43,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:43,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:43,559 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-21 14:07:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:43,663 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-21 14:07:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:43,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 14:07:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:43,680 INFO L225 Difference]: With dead ends: 9100 [2020-08-21 14:07:43,681 INFO L226 Difference]: Without dead ends: 9098 [2020-08-21 14:07:43,685 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 14:07:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-21 14:07:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-21 14:07:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 14:07:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-21 14:07:43,873 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-21 14:07:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:43,874 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-21 14:07:43,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-21 14:07:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 14:07:43,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:43,979 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 14:07:43,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:07:43,980 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-21 14:07:43,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:43,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117614724] [2020-08-21 14:07:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,005 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 14:07:44,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117614724] [2020-08-21 14:07:44,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890690216] [2020-08-21 14:07:44,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,007 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-21 14:07:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,166 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-21 14:07:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:44,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 14:07:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,192 INFO L225 Difference]: With dead ends: 13708 [2020-08-21 14:07:44,192 INFO L226 Difference]: Without dead ends: 13706 [2020-08-21 14:07:44,197 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 14:07:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-21 14:07:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-21 14:07:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-21 14:07:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-21 14:07:44,433 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-21 14:07:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,433 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-21 14:07:44,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-21 14:07:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 14:07:44,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,450 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 14:07:44,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 14:07:44,451 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-21 14:07:44,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397474879] [2020-08-21 14:07:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,470 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 14:07:44,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397474879] [2020-08-21 14:07:44,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460382792] [2020-08-21 14:07:44,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,472 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-21 14:07:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,726 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-21 14:07:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:44,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 14:07:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,752 INFO L225 Difference]: With dead ends: 27788 [2020-08-21 14:07:44,753 INFO L226 Difference]: Without dead ends: 15754 [2020-08-21 14:07:44,773 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 14:07:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-21 14:07:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-21 14:07:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-21 14:07:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-21 14:07:45,195 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-21 14:07:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,196 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-21 14:07:45,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-21 14:07:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:07:45,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,213 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, 1] [2020-08-21 14:07:45,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 14:07:45,213 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-21 14:07:45,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311323242] [2020-08-21 14:07:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,236 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 14:07:45,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311323242] [2020-08-21 14:07:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016580058] [2020-08-21 14:07:45,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,238 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-21 14:07:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,398 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-21 14:07:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 14:07:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,426 INFO L225 Difference]: With dead ends: 23820 [2020-08-21 14:07:45,426 INFO L226 Difference]: Without dead ends: 16138 [2020-08-21 14:07:45,444 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 14:07:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-21 14:07:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-21 14:07:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-21 14:07:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-21 14:07:45,746 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-21 14:07:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,747 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-21 14:07:45,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,747 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-21 14:07:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:07:45,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,767 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, 1] [2020-08-21 14:07:45,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 14:07:45,768 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-21 14:07:45,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012205393] [2020-08-21 14:07:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,787 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 14:07:45,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012205393] [2020-08-21 14:07:45,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042422764] [2020-08-21 14:07:45,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,789 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-21 14:07:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:46,123 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-21 14:07:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:46,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 14:07:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:46,168 INFO L225 Difference]: With dead ends: 26636 [2020-08-21 14:07:46,169 INFO L226 Difference]: Without dead ends: 26634 [2020-08-21 14:07:46,179 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 14:07:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-21 14:07:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-21 14:07:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-21 14:07:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-21 14:07:47,168 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-21 14:07:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:47,169 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-21 14:07:47,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-21 14:07:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:07:47,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:47,204 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, 1] [2020-08-21 14:07:47,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 14:07:47,204 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-21 14:07:47,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:47,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540860399] [2020-08-21 14:07:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:47,222 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 14:07:47,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540860399] [2020-08-21 14:07:47,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:47,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:47,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955085788] [2020-08-21 14:07:47,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:47,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:47,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:47,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:47,224 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-21 14:07:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:47,543 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-21 14:07:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:47,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 14:07:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:47,604 INFO L225 Difference]: With dead ends: 55308 [2020-08-21 14:07:47,605 INFO L226 Difference]: Without dead ends: 31242 [2020-08-21 14:07:47,644 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 14:07:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-21 14:07:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-21 14:07:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-21 14:07:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-21 14:07:48,303 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-21 14:07:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:48,303 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-21 14:07:48,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-21 14:07:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:07:48,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:48,327 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, 1, 1] [2020-08-21 14:07:48,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 14:07:48,327 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:48,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-21 14:07:48,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:48,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827790329] [2020-08-21 14:07:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:48,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:48,344 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 14:07:48,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827790329] [2020-08-21 14:07:48,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:48,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:48,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965904841] [2020-08-21 14:07:48,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:48,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:48,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:48,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:48,346 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-21 14:07:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:48,672 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-21 14:07:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:48,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 14:07:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:48,724 INFO L225 Difference]: With dead ends: 46860 [2020-08-21 14:07:48,724 INFO L226 Difference]: Without dead ends: 31754 [2020-08-21 14:07:48,750 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 14:07:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-21 14:07:49,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-21 14:07:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-21 14:07:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-21 14:07:49,402 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-21 14:07:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:49,403 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-21 14:07:49,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-21 14:07:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:07:49,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:49,421 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, 1, 1] [2020-08-21 14:07:49,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 14:07:49,421 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-21 14:07:49,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:49,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351847811] [2020-08-21 14:07:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,440 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 14:07:49,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351847811] [2020-08-21 14:07:49,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:49,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:49,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185013444] [2020-08-21 14:07:49,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:49,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:49,441 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-21 14:07:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,080 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-21 14:07:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 14:07:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,128 INFO L225 Difference]: With dead ends: 51210 [2020-08-21 14:07:50,128 INFO L226 Difference]: Without dead ends: 51208 [2020-08-21 14:07:50,134 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 14:07:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-21 14:07:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-21 14:07:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-21 14:07:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-21 14:07:50,754 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-21 14:07:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,754 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-21 14:07:50,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-21 14:07:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:07:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,788 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, 1, 1] [2020-08-21 14:07:50,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 14:07:50,788 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-21 14:07:50,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336090601] [2020-08-21 14:07:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,805 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 14:07:50,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336090601] [2020-08-21 14:07:50,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216636016] [2020-08-21 14:07:50,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,807 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-21 14:07:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:51,474 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-21 14:07:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:51,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 14:07:51,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:51,475 INFO L225 Difference]: With dead ends: 109576 [2020-08-21 14:07:51,476 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:07:51,558 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 14:07:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:07:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:07:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:07:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:07:51,559 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-21 14:07:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:51,559 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:07:51,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:51,559 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:07:51,560 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:07:51,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 14:07:51,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:07:51,596 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:07:51,596 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:51,596 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:51,597 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:07:51,597 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:07:51,597 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:07:51,597 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-21 14:07:51,597 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-21 14:07:51,597 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-21 14:07:51,597 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-21 14:07:51,597 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-21 14:07:51,598 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-21 14:07:51,598 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,598 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,598 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,598 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,598 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-21 14:07:51,598 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,598 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-21 14:07:51,598 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,599 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,601 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-21 14:07:51,601 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,601 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-21 14:07:51,602 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,602 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,602 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-21 14:07:51,602 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-21 14:07:51,602 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-21 14:07:51,602 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-21 14:07:51,602 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,602 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,602 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-21 14:07:51,603 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-21 14:07:51,603 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-21 14:07:51,603 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,603 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,603 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,603 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,603 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,603 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,603 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,604 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-21 14:07:51,604 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-21 14:07:51,604 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,604 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 14:07:51,604 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-21 14:07:51,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:07:51 BoogieIcfgContainer [2020-08-21 14:07:51,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:07:51,625 INFO L168 Benchmark]: Toolchain (without parser) took 12523.14 ms. Allocated memory was 140.0 MB in the beginning and 1.0 GB in the end (delta: 872.4 MB). Free memory was 102.6 MB in the beginning and 505.1 MB in the end (delta: -402.5 MB). Peak memory consumption was 469.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:51,633 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:07:51,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.81 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 91.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:51,635 INFO L168 Benchmark]: Boogie Preprocessor took 114.84 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 180.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:51,636 INFO L168 Benchmark]: RCFGBuilder took 369.95 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 160.1 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:51,637 INFO L168 Benchmark]: TraceAbstraction took 11775.59 ms. Allocated memory was 202.9 MB in the beginning and 1.0 GB in the end (delta: 809.5 MB). Free memory was 159.5 MB in the beginning and 505.1 MB in the end (delta: -345.6 MB). Peak memory consumption was 463.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:51,640 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.81 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 91.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.84 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 180.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.95 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 160.1 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11775.59 ms. Allocated memory was 202.9 MB in the beginning and 1.0 GB in the end (delta: 809.5 MB). Free memory was 159.5 MB in the beginning and 505.1 MB in the end (delta: -345.6 MB). Peak memory consumption was 463.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.6s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...