/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:20:32,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:32,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:32,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:32,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:32,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:32,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:32,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:32,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:32,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:32,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:32,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:32,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:32,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:32,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:32,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:32,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:32,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:32,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:32,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:32,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:32,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:32,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:32,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:32,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:20:32,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:32,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:32,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:32,835 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 [2020-09-21 10:20:32,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:32,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:32,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:32,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:32,865 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:32,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:32,865 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:32,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:32,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:32,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:32,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:32,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:32,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:32,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:32,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:32,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:32,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:32,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:32,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:32,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:32,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:32,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:32,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:32,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:32,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:32,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:32,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:32,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:32,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:32,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:20:33,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:33,378 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:33,382 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:33,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:33,384 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:33,387 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-09-21 10:20:33,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d42c12f4a/ce2eb8c025dc47f193a55b383c1ff541/FLAG0df0f96fd [2020-09-21 10:20:34,006 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:34,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-09-21 10:20:34,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d42c12f4a/ce2eb8c025dc47f193a55b383c1ff541/FLAG0df0f96fd [2020-09-21 10:20:34,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d42c12f4a/ce2eb8c025dc47f193a55b383c1ff541 [2020-09-21 10:20:34,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:34,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:34,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:34,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:34,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:34,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34, skipping insertion in model container [2020-09-21 10:20:34,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:34,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:34,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:34,676 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:34,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:34,726 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:34,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34 WrapperNode [2020-09-21 10:20:34,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:34,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:34,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:34,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:34,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (1/1) ... [2020-09-21 10:20:34,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:34,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:34,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:34,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:34,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (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 [2020-09-21 10:20:34,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:34,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:34,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:34,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:34,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:35,328 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:35,328 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:20:35,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:35 BoogieIcfgContainer [2020-09-21 10:20:35,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:35,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:35,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:35,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:35,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:34" (1/3) ... [2020-09-21 10:20:35,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d72e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:35, skipping insertion in model container [2020-09-21 10:20:35,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:34" (2/3) ... [2020-09-21 10:20:35,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d72e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:35, skipping insertion in model container [2020-09-21 10:20:35,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:35" (3/3) ... [2020-09-21 10:20:35,349 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-09-21 10:20:35,365 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:35,375 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:35,395 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:35,428 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:35,429 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:35,429 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:35,429 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:35,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:35,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:35,432 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:35,432 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-21 10:20:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:35,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:35,468 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,477 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-09-21 10:20:35,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475346468] [2020-09-21 10:20:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:35,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475346468] [2020-09-21 10:20:35,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:35,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:35,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341698278] [2020-09-21 10:20:35,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:35,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:35,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:35,799 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-09-21 10:20:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:35,886 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-09-21 10:20:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:35,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:20:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:35,902 INFO L225 Difference]: With dead ends: 87 [2020-09-21 10:20:35,903 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 10:20:35,906 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 [2020-09-21 10:20:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 10:20:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-09-21 10:20:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 10:20:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-09-21 10:20:35,965 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-09-21 10:20:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:35,966 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-09-21 10:20:35,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-09-21 10:20:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:35,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:35,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:35,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:35,969 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:35,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-09-21 10:20:35,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:35,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007390758] [2020-09-21 10:20:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007390758] [2020-09-21 10:20:36,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290177588] [2020-09-21 10:20:36,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,051 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-09-21 10:20:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,086 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-09-21 10:20:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:20:36,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,089 INFO L225 Difference]: With dead ends: 117 [2020-09-21 10:20:36,090 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 10:20:36,091 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 [2020-09-21 10:20:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 10:20:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-09-21 10:20:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 10:20:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-09-21 10:20:36,105 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-09-21 10:20:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,105 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-09-21 10:20:36,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-09-21 10:20:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:36,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,107 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] [2020-09-21 10:20:36,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:36,108 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-09-21 10:20:36,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982794815] [2020-09-21 10:20:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982794815] [2020-09-21 10:20:36,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016607281] [2020-09-21 10:20:36,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,187 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-09-21 10:20:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,227 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-09-21 10:20:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,231 INFO L225 Difference]: With dead ends: 108 [2020-09-21 10:20:36,231 INFO L226 Difference]: Without dead ends: 75 [2020-09-21 10:20:36,235 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 [2020-09-21 10:20:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-21 10:20:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-09-21 10:20:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 10:20:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-09-21 10:20:36,256 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-09-21 10:20:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,258 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-09-21 10:20:36,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-09-21 10:20:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:36,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,259 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] [2020-09-21 10:20:36,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:36,260 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-09-21 10:20:36,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214858791] [2020-09-21 10:20:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214858791] [2020-09-21 10:20:36,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512713996] [2020-09-21 10:20:36,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,349 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-09-21 10:20:36,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,369 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-09-21 10:20:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,371 INFO L225 Difference]: With dead ends: 136 [2020-09-21 10:20:36,371 INFO L226 Difference]: Without dead ends: 134 [2020-09-21 10:20:36,372 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 [2020-09-21 10:20:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-21 10:20:36,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-09-21 10:20:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-21 10:20:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-09-21 10:20:36,388 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-09-21 10:20:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,389 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-09-21 10:20:36,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-09-21 10:20:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:36,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,391 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] [2020-09-21 10:20:36,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:36,391 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,392 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-09-21 10:20:36,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2842700] [2020-09-21 10:20:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2842700] [2020-09-21 10:20:36,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086647625] [2020-09-21 10:20:36,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,461 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-09-21 10:20:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,496 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-09-21 10:20:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,500 INFO L225 Difference]: With dead ends: 224 [2020-09-21 10:20:36,500 INFO L226 Difference]: Without dead ends: 136 [2020-09-21 10:20:36,505 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 [2020-09-21 10:20:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-21 10:20:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-09-21 10:20:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-21 10:20:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-09-21 10:20:36,528 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-09-21 10:20:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,528 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-09-21 10:20:36,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-09-21 10:20:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:36,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,534 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] [2020-09-21 10:20:36,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:36,534 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-09-21 10:20:36,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137962814] [2020-09-21 10:20:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137962814] [2020-09-21 10:20:36,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331360937] [2020-09-21 10:20:36,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,616 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-09-21 10:20:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,634 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-09-21 10:20:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,637 INFO L225 Difference]: With dead ends: 201 [2020-09-21 10:20:36,637 INFO L226 Difference]: Without dead ends: 138 [2020-09-21 10:20:36,638 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 [2020-09-21 10:20:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-21 10:20:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-09-21 10:20:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-21 10:20:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-09-21 10:20:36,649 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-09-21 10:20:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,649 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-09-21 10:20:36,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-09-21 10:20:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:36,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,651 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] [2020-09-21 10:20:36,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:36,652 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,652 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-09-21 10:20:36,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518583884] [2020-09-21 10:20:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518583884] [2020-09-21 10:20:36,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290689591] [2020-09-21 10:20:36,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,703 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-09-21 10:20:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,721 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-09-21 10:20:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,723 INFO L225 Difference]: With dead ends: 252 [2020-09-21 10:20:36,723 INFO L226 Difference]: Without dead ends: 250 [2020-09-21 10:20:36,724 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 [2020-09-21 10:20:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-21 10:20:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-09-21 10:20:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-21 10:20:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-09-21 10:20:36,736 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-09-21 10:20:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,740 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-09-21 10:20:36,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-09-21 10:20:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:36,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,742 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] [2020-09-21 10:20:36,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:20:36,744 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,745 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-09-21 10:20:36,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573608063] [2020-09-21 10:20:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573608063] [2020-09-21 10:20:36,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101903860] [2020-09-21 10:20:36,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,788 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-09-21 10:20:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,828 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-09-21 10:20:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,830 INFO L225 Difference]: With dead ends: 432 [2020-09-21 10:20:36,830 INFO L226 Difference]: Without dead ends: 258 [2020-09-21 10:20:36,832 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 [2020-09-21 10:20:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-21 10:20:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-09-21 10:20:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-21 10:20:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-09-21 10:20:36,845 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-09-21 10:20:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,846 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-09-21 10:20:36,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-09-21 10:20:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:36,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,848 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] [2020-09-21 10:20:36,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:20:36,849 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-09-21 10:20:36,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671064033] [2020-09-21 10:20:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671064033] [2020-09-21 10:20:36,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648420765] [2020-09-21 10:20:36,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,882 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-09-21 10:20:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,905 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-09-21 10:20:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:36,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,907 INFO L225 Difference]: With dead ends: 384 [2020-09-21 10:20:36,907 INFO L226 Difference]: Without dead ends: 262 [2020-09-21 10:20:36,908 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 [2020-09-21 10:20:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-21 10:20:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-09-21 10:20:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-21 10:20:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-09-21 10:20:36,918 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-09-21 10:20:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,919 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-09-21 10:20:36,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-09-21 10:20:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:36,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,920 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] [2020-09-21 10:20:36,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:20:36,921 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-09-21 10:20:36,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303904769] [2020-09-21 10:20:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:36,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303904769] [2020-09-21 10:20:36,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:36,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:36,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787751544] [2020-09-21 10:20:36,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:36,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:36,950 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-09-21 10:20:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:36,972 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-09-21 10:20:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:36,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:36,975 INFO L225 Difference]: With dead ends: 476 [2020-09-21 10:20:36,975 INFO L226 Difference]: Without dead ends: 474 [2020-09-21 10:20:36,976 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 [2020-09-21 10:20:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-09-21 10:20:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-09-21 10:20:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-09-21 10:20:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-09-21 10:20:36,989 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-09-21 10:20:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:36,989 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-09-21 10:20:36,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-09-21 10:20:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:36,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:36,991 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] [2020-09-21 10:20:36,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:20:36,991 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-09-21 10:20:36,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:36,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037124] [2020-09-21 10:20:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037124] [2020-09-21 10:20:37,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948344830] [2020-09-21 10:20:37,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,021 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-09-21 10:20:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,044 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-09-21 10:20:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,048 INFO L225 Difference]: With dead ends: 844 [2020-09-21 10:20:37,048 INFO L226 Difference]: Without dead ends: 498 [2020-09-21 10:20:37,049 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 [2020-09-21 10:20:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-09-21 10:20:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-09-21 10:20:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-09-21 10:20:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-09-21 10:20:37,065 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-09-21 10:20:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,065 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-09-21 10:20:37,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-09-21 10:20:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:37,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,067 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] [2020-09-21 10:20:37,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:20:37,068 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,068 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-09-21 10:20:37,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101562110] [2020-09-21 10:20:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101562110] [2020-09-21 10:20:37,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015882081] [2020-09-21 10:20:37,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,109 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-09-21 10:20:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,128 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-09-21 10:20:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,132 INFO L225 Difference]: With dead ends: 744 [2020-09-21 10:20:37,132 INFO L226 Difference]: Without dead ends: 506 [2020-09-21 10:20:37,133 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 [2020-09-21 10:20:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-09-21 10:20:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-09-21 10:20:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-09-21 10:20:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-09-21 10:20:37,148 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-09-21 10:20:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,148 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-09-21 10:20:37,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-09-21 10:20:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:37,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,150 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] [2020-09-21 10:20:37,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:20:37,150 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-09-21 10:20:37,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419268794] [2020-09-21 10:20:37,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419268794] [2020-09-21 10:20:37,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596751720] [2020-09-21 10:20:37,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,185 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-09-21 10:20:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,213 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-09-21 10:20:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,218 INFO L225 Difference]: With dead ends: 908 [2020-09-21 10:20:37,219 INFO L226 Difference]: Without dead ends: 906 [2020-09-21 10:20:37,219 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 [2020-09-21 10:20:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-09-21 10:20:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-09-21 10:20:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-09-21 10:20:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-09-21 10:20:37,239 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-09-21 10:20:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,239 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-09-21 10:20:37,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-09-21 10:20:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:37,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,241 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] [2020-09-21 10:20:37,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:20:37,241 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-09-21 10:20:37,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590957270] [2020-09-21 10:20:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590957270] [2020-09-21 10:20:37,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241093652] [2020-09-21 10:20:37,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,276 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-09-21 10:20:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,307 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-09-21 10:20:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,312 INFO L225 Difference]: With dead ends: 1660 [2020-09-21 10:20:37,313 INFO L226 Difference]: Without dead ends: 970 [2020-09-21 10:20:37,314 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 [2020-09-21 10:20:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-09-21 10:20:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-09-21 10:20:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-09-21 10:20:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-09-21 10:20:37,344 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-09-21 10:20:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,344 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-09-21 10:20:37,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-09-21 10:20:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:37,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,346 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] [2020-09-21 10:20:37,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:20:37,347 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-09-21 10:20:37,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971477460] [2020-09-21 10:20:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971477460] [2020-09-21 10:20:37,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906140860] [2020-09-21 10:20:37,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,376 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-09-21 10:20:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,403 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-09-21 10:20:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,409 INFO L225 Difference]: With dead ends: 1452 [2020-09-21 10:20:37,409 INFO L226 Difference]: Without dead ends: 986 [2020-09-21 10:20:37,410 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 [2020-09-21 10:20:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-09-21 10:20:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-09-21 10:20:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-09-21 10:20:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-09-21 10:20:37,449 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-09-21 10:20:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,449 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-09-21 10:20:37,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-09-21 10:20:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:37,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,451 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] [2020-09-21 10:20:37,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:20:37,451 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-09-21 10:20:37,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676500515] [2020-09-21 10:20:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676500515] [2020-09-21 10:20:37,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369762042] [2020-09-21 10:20:37,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,479 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-09-21 10:20:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,509 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-09-21 10:20:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,517 INFO L225 Difference]: With dead ends: 1740 [2020-09-21 10:20:37,518 INFO L226 Difference]: Without dead ends: 1738 [2020-09-21 10:20:37,519 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 [2020-09-21 10:20:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-09-21 10:20:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-09-21 10:20:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-09-21 10:20:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-09-21 10:20:37,556 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-09-21 10:20:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,556 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-09-21 10:20:37,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-09-21 10:20:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:37,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,559 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] [2020-09-21 10:20:37,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:20:37,559 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-09-21 10:20:37,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485160485] [2020-09-21 10:20:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485160485] [2020-09-21 10:20:37,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414040715] [2020-09-21 10:20:37,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,585 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-09-21 10:20:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,629 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-09-21 10:20:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,639 INFO L225 Difference]: With dead ends: 3276 [2020-09-21 10:20:37,639 INFO L226 Difference]: Without dead ends: 1898 [2020-09-21 10:20:37,642 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 [2020-09-21 10:20:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-09-21 10:20:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-09-21 10:20:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-09-21 10:20:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-09-21 10:20:37,695 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-09-21 10:20:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,696 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-09-21 10:20:37,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-09-21 10:20:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:20:37,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,698 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] [2020-09-21 10:20:37,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:20:37,699 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-09-21 10:20:37,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969636837] [2020-09-21 10:20:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969636837] [2020-09-21 10:20:37,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554036553] [2020-09-21 10:20:37,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,724 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-09-21 10:20:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,762 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-09-21 10:20:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 10:20:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,771 INFO L225 Difference]: With dead ends: 2844 [2020-09-21 10:20:37,771 INFO L226 Difference]: Without dead ends: 1930 [2020-09-21 10:20:37,773 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 [2020-09-21 10:20:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-09-21 10:20:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-09-21 10:20:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-09-21 10:20:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-09-21 10:20:37,824 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-09-21 10:20:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,825 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-09-21 10:20:37,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-09-21 10:20:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:20:37,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,827 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] [2020-09-21 10:20:37,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:20:37,828 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-09-21 10:20:37,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600778661] [2020-09-21 10:20:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600778661] [2020-09-21 10:20:37,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985723825] [2020-09-21 10:20:37,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,854 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-09-21 10:20:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,903 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-09-21 10:20:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 10:20:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,918 INFO L225 Difference]: With dead ends: 3340 [2020-09-21 10:20:37,919 INFO L226 Difference]: Without dead ends: 3338 [2020-09-21 10:20:37,920 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 [2020-09-21 10:20:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-09-21 10:20:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-09-21 10:20:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-09-21 10:20:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-09-21 10:20:38,011 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-09-21 10:20:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,011 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-09-21 10:20:38,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-09-21 10:20:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:20:38,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,016 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] [2020-09-21 10:20:38,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:20:38,016 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-09-21 10:20:38,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618002987] [2020-09-21 10:20:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618002987] [2020-09-21 10:20:38,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100549742] [2020-09-21 10:20:38,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,041 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-09-21 10:20:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,098 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-09-21 10:20:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 10:20:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,114 INFO L225 Difference]: With dead ends: 6476 [2020-09-21 10:20:38,115 INFO L226 Difference]: Without dead ends: 3722 [2020-09-21 10:20:38,119 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 [2020-09-21 10:20:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-09-21 10:20:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-09-21 10:20:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-09-21 10:20:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-09-21 10:20:38,213 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-09-21 10:20:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,214 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-09-21 10:20:38,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-09-21 10:20:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:20:38,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,218 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] [2020-09-21 10:20:38,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:20:38,219 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-09-21 10:20:38,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008228156] [2020-09-21 10:20:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008228156] [2020-09-21 10:20:38,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662106265] [2020-09-21 10:20:38,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,246 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-09-21 10:20:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,301 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-09-21 10:20:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 10:20:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,315 INFO L225 Difference]: With dead ends: 5580 [2020-09-21 10:20:38,316 INFO L226 Difference]: Without dead ends: 3786 [2020-09-21 10:20:38,319 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 [2020-09-21 10:20:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-09-21 10:20:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-09-21 10:20:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-09-21 10:20:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-09-21 10:20:38,437 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-09-21 10:20:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,439 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-09-21 10:20:38,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-09-21 10:20:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:20:38,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,444 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] [2020-09-21 10:20:38,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:20:38,445 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-09-21 10:20:38,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499936371] [2020-09-21 10:20:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499936371] [2020-09-21 10:20:38,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687475696] [2020-09-21 10:20:38,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,481 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-09-21 10:20:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,584 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-09-21 10:20:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 10:20:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,611 INFO L225 Difference]: With dead ends: 10956 [2020-09-21 10:20:38,611 INFO L226 Difference]: Without dead ends: 7306 [2020-09-21 10:20:38,619 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 [2020-09-21 10:20:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-09-21 10:20:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-09-21 10:20:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-09-21 10:20:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-09-21 10:20:38,781 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-09-21 10:20:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,781 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-09-21 10:20:38,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-09-21 10:20:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:20:38,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,790 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] [2020-09-21 10:20:38,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:20:38,790 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-09-21 10:20:38,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757106046] [2020-09-21 10:20:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757106046] [2020-09-21 10:20:38,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656892279] [2020-09-21 10:20:38,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,816 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-09-21 10:20:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,932 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-09-21 10:20:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 10:20:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,949 INFO L225 Difference]: With dead ends: 8076 [2020-09-21 10:20:38,949 INFO L226 Difference]: Without dead ends: 8074 [2020-09-21 10:20:38,953 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 [2020-09-21 10:20:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-09-21 10:20:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-09-21 10:20:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-09-21 10:20:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-09-21 10:20:39,151 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-09-21 10:20:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,151 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-09-21 10:20:39,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-09-21 10:20:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:20:39,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,165 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] [2020-09-21 10:20:39,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:20:39,165 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-09-21 10:20:39,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760670800] [2020-09-21 10:20:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760670800] [2020-09-21 10:20:39,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418248330] [2020-09-21 10:20:39,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,221 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-09-21 10:20:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,377 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-09-21 10:20:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:39,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 10:20:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,401 INFO L225 Difference]: With dead ends: 12172 [2020-09-21 10:20:39,401 INFO L226 Difference]: Without dead ends: 12170 [2020-09-21 10:20:39,406 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 [2020-09-21 10:20:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-09-21 10:20:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-09-21 10:20:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-09-21 10:20:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-09-21 10:20:39,659 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-09-21 10:20:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,659 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-09-21 10:20:39,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-09-21 10:20:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:20:39,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,677 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] [2020-09-21 10:20:39,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 10:20:39,677 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-09-21 10:20:39,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178926111] [2020-09-21 10:20:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178926111] [2020-09-21 10:20:39,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576733137] [2020-09-21 10:20:39,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,701 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-09-21 10:20:39,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,884 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-09-21 10:20:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:39,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 10:20:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,916 INFO L225 Difference]: With dead ends: 25228 [2020-09-21 10:20:39,917 INFO L226 Difference]: Without dead ends: 14218 [2020-09-21 10:20:39,943 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 [2020-09-21 10:20:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-09-21 10:20:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-09-21 10:20:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-09-21 10:20:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-09-21 10:20:40,383 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-09-21 10:20:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:40,383 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-09-21 10:20:40,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-09-21 10:20:40,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:20:40,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,401 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] [2020-09-21 10:20:40,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 10:20:40,402 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,402 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-09-21 10:20:40,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012580379] [2020-09-21 10:20:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:40,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012580379] [2020-09-21 10:20:40,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:40,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:40,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631285354] [2020-09-21 10:20:40,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:40,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:40,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:40,425 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-09-21 10:20:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,595 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-09-21 10:20:40,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:40,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 10:20:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,623 INFO L225 Difference]: With dead ends: 21516 [2020-09-21 10:20:40,623 INFO L226 Difference]: Without dead ends: 14602 [2020-09-21 10:20:40,639 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 [2020-09-21 10:20:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-09-21 10:20:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-09-21 10:20:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-09-21 10:20:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-09-21 10:20:41,401 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-09-21 10:20:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,402 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-09-21 10:20:41,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-09-21 10:20:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:20:41,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,418 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] [2020-09-21 10:20:41,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 10:20:41,419 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-09-21 10:20:41,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115823473] [2020-09-21 10:20:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115823473] [2020-09-21 10:20:41,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845448221] [2020-09-21 10:20:41,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,445 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-09-21 10:20:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,666 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-09-21 10:20:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 10:20:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,709 INFO L225 Difference]: With dead ends: 23562 [2020-09-21 10:20:41,709 INFO L226 Difference]: Without dead ends: 23560 [2020-09-21 10:20:41,718 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 [2020-09-21 10:20:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-09-21 10:20:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-09-21 10:20:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-09-21 10:20:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-09-21 10:20:42,213 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-09-21 10:20:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,213 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-09-21 10:20:42,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-09-21 10:20:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:20:42,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,248 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] [2020-09-21 10:20:42,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 10:20:42,248 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-09-21 10:20:42,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335421988] [2020-09-21 10:20:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335421988] [2020-09-21 10:20:42,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77077708] [2020-09-21 10:20:42,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,275 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-09-21 10:20:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,690 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-09-21 10:20:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 10:20:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,691 INFO L225 Difference]: With dead ends: 50184 [2020-09-21 10:20:42,692 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:20:42,750 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 [2020-09-21 10:20:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:20:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:20:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:20:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:20:42,751 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-09-21 10:20:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,751 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:20:42,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:20:42,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:20:42,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 10:20:42,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:20:42,785 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:20:42,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:42,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:42,785 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:20:42,785 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:20:42,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:20:42,786 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-09-21 10:20:42,786 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-09-21 10:20:42,786 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,786 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,786 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,786 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,786 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-09-21 10:20:42,786 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,787 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-09-21 10:20:42,788 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,788 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,788 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,788 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-09-21 10:20:42,788 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-09-21 10:20:42,788 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-09-21 10:20:42,788 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-09-21 10:20:42,789 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-09-21 10:20:42,789 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-09-21 10:20:42,789 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-09-21 10:20:42,789 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,789 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,789 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-09-21 10:20:42,789 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-09-21 10:20:42,789 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,789 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,790 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,790 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,790 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,790 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-09-21 10:20:42,790 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,790 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-09-21 10:20:42,790 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,791 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-09-21 10:20:42,791 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-09-21 10:20:42,791 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,791 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 10:20:42,791 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-09-21 10:20:42,791 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-09-21 10:20:42,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:42 BoogieIcfgContainer [2020-09-21 10:20:42,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:42,814 INFO L168 Benchmark]: Toolchain (without parser) took 8442.28 ms. Allocated memory was 140.0 MB in the beginning and 570.9 MB in the end (delta: 431.0 MB). Free memory was 101.6 MB in the beginning and 235.1 MB in the end (delta: -133.5 MB). Peak memory consumption was 297.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,816 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.70 ms. Allocated memory is still 140.0 MB. Free memory was 100.9 MB in the beginning and 90.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,823 INFO L168 Benchmark]: Boogie Preprocessor took 141.85 ms. Allocated memory was 140.0 MB in the beginning and 200.8 MB in the end (delta: 60.8 MB). Free memory was 90.2 MB in the beginning and 178.1 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,823 INFO L168 Benchmark]: RCFGBuilder took 464.21 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 158.4 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,824 INFO L168 Benchmark]: TraceAbstraction took 7469.35 ms. Allocated memory was 200.8 MB in the beginning and 570.9 MB in the end (delta: 370.1 MB). Free memory was 158.4 MB in the beginning and 235.1 MB in the end (delta: -76.7 MB). Peak memory consumption was 293.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,827 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 352.70 ms. Allocated memory is still 140.0 MB. Free memory was 100.9 MB in the beginning and 90.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.85 ms. Allocated memory was 140.0 MB in the beginning and 200.8 MB in the end (delta: 60.8 MB). Free memory was 90.2 MB in the beginning and 178.1 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 464.21 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 158.4 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7469.35 ms. Allocated memory was 200.8 MB in the beginning and 570.9 MB in the end (delta: 370.1 MB). Free memory was 158.4 MB in the beginning and 235.1 MB in the end (delta: -76.7 MB). Peak memory consumption was 293.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...