/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:57:22,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:57:22,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:57:22,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:57:22,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:57:22,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:57:22,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:57:22,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:57:22,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:57:22,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:57:22,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:57:22,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:57:22,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:57:22,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:57:22,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:57:22,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:57:22,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:57:22,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:57:22,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:57:22,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:57:22,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:57:22,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:57:22,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:57:22,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:57:22,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:57:22,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:57:22,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:57:22,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:57:22,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:57:22,964 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:57:22,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:57:22,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:57:22,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:57:22,966 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:57:22,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:57:22,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:57:22,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:57:22,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:57:22,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:57:22,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:57:22,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:57:22,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:57:22,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:57:22,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:57:22,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:57:22,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:57:22,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:57:22,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:57:22,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:57:22,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:57:22,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:22,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:57:22,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:57:22,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:57:22,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:57:22,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:57:22,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:57:22,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:57:22,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:57:23,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:57:23,320 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:57:23,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:57:23,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:57:23,328 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:57:23,329 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 18:57:23,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9f711fcf/a75e48a9e54a4058bf0492da842b4e7b/FLAG6235e7244 [2020-08-21 18:57:23,903 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:57:23,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 18:57:23,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9f711fcf/a75e48a9e54a4058bf0492da842b4e7b/FLAG6235e7244 [2020-08-21 18:57:24,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9f711fcf/a75e48a9e54a4058bf0492da842b4e7b [2020-08-21 18:57:24,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:57:24,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:57:24,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:24,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:57:24,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:57:24,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5b442e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24, skipping insertion in model container [2020-08-21 18:57:24,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:57:24,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:57:24,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:24,629 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:57:24,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:24,677 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:57:24,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24 WrapperNode [2020-08-21 18:57:24,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:24,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:57:24,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:57:24,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:57:24,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (1/1) ... [2020-08-21 18:57:24,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:57:24,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:57:24,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:57:24,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:57:24,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:24,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:57:24,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:57:24,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:57:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:57:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:57:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:57:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:57:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:57:25,235 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:57:25,236 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:57:25,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:25 BoogieIcfgContainer [2020-08-21 18:57:25,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:57:25,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:57:25,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:57:25,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:57:25,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:57:24" (1/3) ... [2020-08-21 18:57:25,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a7e37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:25, skipping insertion in model container [2020-08-21 18:57:25,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:24" (2/3) ... [2020-08-21 18:57:25,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a7e37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:25, skipping insertion in model container [2020-08-21 18:57:25,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:25" (3/3) ... [2020-08-21 18:57:25,267 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-21 18:57:25,277 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:57:25,284 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:57:25,299 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:57:25,322 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:57:25,322 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:57:25,322 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:57:25,322 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:57:25,323 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:57:25,323 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:57:25,323 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:57:25,323 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:57:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-21 18:57:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:57:25,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:25,350 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-21 18:57:25,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836580794] [2020-08-21 18:57:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:25,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836580794] [2020-08-21 18:57:25,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153908759] [2020-08-21 18:57:25,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,626 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-21 18:57:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,705 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-21 18:57:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:57:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,720 INFO L225 Difference]: With dead ends: 93 [2020-08-21 18:57:25,720 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 18:57:25,724 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 [2020-08-21 18:57:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 18:57:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-21 18:57:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 18:57:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-21 18:57:25,771 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-21 18:57:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,772 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-21 18:57:25,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-21 18:57:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:57:25,773 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:25,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:57:25,775 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-21 18:57:25,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427931792] [2020-08-21 18:57:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:25,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427931792] [2020-08-21 18:57:25,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185036954] [2020-08-21 18:57:25,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,849 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-21 18:57:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,882 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-21 18:57:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:57:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,885 INFO L225 Difference]: With dead ends: 127 [2020-08-21 18:57:25,885 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 18:57:25,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 18:57:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 18:57:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 18:57:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-21 18:57:25,899 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-21 18:57:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,899 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-21 18:57:25,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-21 18:57:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:25,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:25,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:57:25,902 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-21 18:57:25,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193222570] [2020-08-21 18:57:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:25,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193222570] [2020-08-21 18:57:25,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851180433] [2020-08-21 18:57:25,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,973 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-21 18:57:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,001 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-21 18:57:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,003 INFO L225 Difference]: With dead ends: 117 [2020-08-21 18:57:26,003 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 18:57:26,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 18:57:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-21 18:57:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 18:57:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-21 18:57:26,014 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-21 18:57:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,015 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-21 18:57:26,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-21 18:57:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:26,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,016 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] [2020-08-21 18:57:26,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:57:26,017 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-21 18:57:26,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625087167] [2020-08-21 18:57:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625087167] [2020-08-21 18:57:26,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873223217] [2020-08-21 18:57:26,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,071 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-21 18:57:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,092 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-21 18:57:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,097 INFO L225 Difference]: With dead ends: 148 [2020-08-21 18:57:26,097 INFO L226 Difference]: Without dead ends: 146 [2020-08-21 18:57:26,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-21 18:57:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-21 18:57:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 18:57:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-21 18:57:26,118 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-21 18:57:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,118 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-21 18:57:26,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-21 18:57:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:26,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:26,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:57:26,124 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-21 18:57:26,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643760470] [2020-08-21 18:57:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643760470] [2020-08-21 18:57:26,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651708176] [2020-08-21 18:57:26,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,172 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-21 18:57:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,195 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-21 18:57:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,198 INFO L225 Difference]: With dead ends: 244 [2020-08-21 18:57:26,198 INFO L226 Difference]: Without dead ends: 148 [2020-08-21 18:57:26,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-21 18:57:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-21 18:57:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 18:57:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-21 18:57:26,214 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-21 18:57:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,214 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-21 18:57:26,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-21 18:57:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:26,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:26,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:57:26,217 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,217 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-21 18:57:26,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101782036] [2020-08-21 18:57:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101782036] [2020-08-21 18:57:26,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387092724] [2020-08-21 18:57:26,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,301 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-21 18:57:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,324 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-21 18:57:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,327 INFO L225 Difference]: With dead ends: 219 [2020-08-21 18:57:26,327 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 18:57:26,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 18:57:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-21 18:57:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-21 18:57:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-21 18:57:26,361 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-21 18:57:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,368 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-21 18:57:26,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-21 18:57:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:26,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:26,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:57:26,370 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-21 18:57:26,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384805875] [2020-08-21 18:57:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384805875] [2020-08-21 18:57:26,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129224522] [2020-08-21 18:57:26,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,462 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-21 18:57:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,495 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-21 18:57:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,499 INFO L225 Difference]: With dead ends: 276 [2020-08-21 18:57:26,499 INFO L226 Difference]: Without dead ends: 274 [2020-08-21 18:57:26,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-21 18:57:26,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-21 18:57:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 18:57:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-21 18:57:26,515 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-21 18:57:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,516 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-21 18:57:26,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-21 18:57:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:26,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:26,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:57:26,518 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-21 18:57:26,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573837144] [2020-08-21 18:57:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573837144] [2020-08-21 18:57:26,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734350610] [2020-08-21 18:57:26,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,557 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-21 18:57:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,580 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-21 18:57:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,583 INFO L225 Difference]: With dead ends: 472 [2020-08-21 18:57:26,583 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 18:57:26,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 18:57:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-21 18:57:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-21 18:57:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-21 18:57:26,609 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-21 18:57:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,609 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-21 18:57:26,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-21 18:57:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:26,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:26,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:57:26,616 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-21 18:57:26,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137864667] [2020-08-21 18:57:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137864667] [2020-08-21 18:57:26,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786631144] [2020-08-21 18:57:26,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,648 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-21 18:57:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,668 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-21 18:57:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,671 INFO L225 Difference]: With dead ends: 420 [2020-08-21 18:57:26,671 INFO L226 Difference]: Without dead ends: 286 [2020-08-21 18:57:26,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-21 18:57:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-21 18:57:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-21 18:57:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-21 18:57:26,684 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-21 18:57:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,685 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-21 18:57:26,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-21 18:57:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:26,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:26,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:57:26,688 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-21 18:57:26,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890694057] [2020-08-21 18:57:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890694057] [2020-08-21 18:57:26,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219264498] [2020-08-21 18:57:26,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,718 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-21 18:57:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,751 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-21 18:57:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,755 INFO L225 Difference]: With dead ends: 524 [2020-08-21 18:57:26,755 INFO L226 Difference]: Without dead ends: 522 [2020-08-21 18:57:26,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-21 18:57:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-21 18:57:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 18:57:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-21 18:57:26,776 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-21 18:57:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,779 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-21 18:57:26,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-21 18:57:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:26,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:26,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:57:26,782 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,782 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-21 18:57:26,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563480284] [2020-08-21 18:57:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563480284] [2020-08-21 18:57:26,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237159156] [2020-08-21 18:57:26,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,840 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-21 18:57:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,900 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-21 18:57:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,905 INFO L225 Difference]: With dead ends: 924 [2020-08-21 18:57:26,906 INFO L226 Difference]: Without dead ends: 546 [2020-08-21 18:57:26,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-21 18:57:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-21 18:57:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-21 18:57:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-21 18:57:26,936 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-21 18:57:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,936 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-21 18:57:26,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-21 18:57:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:26,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:26,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:57:26,943 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,944 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-21 18:57:26,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803471164] [2020-08-21 18:57:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:26,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803471164] [2020-08-21 18:57:26,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702522454] [2020-08-21 18:57:26,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,989 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-21 18:57:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,021 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-21 18:57:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,026 INFO L225 Difference]: With dead ends: 816 [2020-08-21 18:57:27,026 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 18:57:27,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 18:57:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-21 18:57:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-21 18:57:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-21 18:57:27,050 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-21 18:57:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,050 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-21 18:57:27,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-21 18:57:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:27,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:57:27,054 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-21 18:57:27,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422825793] [2020-08-21 18:57:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:27,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422825793] [2020-08-21 18:57:27,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791535694] [2020-08-21 18:57:27,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,109 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-21 18:57:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,146 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-21 18:57:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,153 INFO L225 Difference]: With dead ends: 1004 [2020-08-21 18:57:27,153 INFO L226 Difference]: Without dead ends: 1002 [2020-08-21 18:57:27,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-21 18:57:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-21 18:57:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 18:57:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-21 18:57:27,184 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-21 18:57:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,185 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-21 18:57:27,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-21 18:57:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:27,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:57:27,188 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-21 18:57:27,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681698824] [2020-08-21 18:57:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:27,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681698824] [2020-08-21 18:57:27,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240633174] [2020-08-21 18:57:27,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,238 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-21 18:57:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,275 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-21 18:57:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,282 INFO L225 Difference]: With dead ends: 1820 [2020-08-21 18:57:27,282 INFO L226 Difference]: Without dead ends: 1066 [2020-08-21 18:57:27,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-21 18:57:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-21 18:57:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-21 18:57:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-21 18:57:27,323 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-21 18:57:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,324 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-21 18:57:27,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-21 18:57:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:27,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:57:27,328 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,328 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-21 18:57:27,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458262399] [2020-08-21 18:57:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:27,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458262399] [2020-08-21 18:57:27,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171354375] [2020-08-21 18:57:27,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,370 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-21 18:57:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,399 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-21 18:57:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,406 INFO L225 Difference]: With dead ends: 1596 [2020-08-21 18:57:27,406 INFO L226 Difference]: Without dead ends: 1082 [2020-08-21 18:57:27,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-21 18:57:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-21 18:57:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-21 18:57:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-21 18:57:27,440 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-21 18:57:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,441 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-21 18:57:27,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-21 18:57:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:27,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,444 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] [2020-08-21 18:57:27,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:57:27,444 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-21 18:57:27,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38213655] [2020-08-21 18:57:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:27,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38213655] [2020-08-21 18:57:27,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106559596] [2020-08-21 18:57:27,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,480 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-21 18:57:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,521 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-21 18:57:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,532 INFO L225 Difference]: With dead ends: 1932 [2020-08-21 18:57:27,533 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 18:57:27,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 18:57:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-21 18:57:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 18:57:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-21 18:57:27,583 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-21 18:57:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,583 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-21 18:57:27,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-21 18:57:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:27,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:57:27,588 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-21 18:57:27,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340017674] [2020-08-21 18:57:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:27,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340017674] [2020-08-21 18:57:27,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200607508] [2020-08-21 18:57:27,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,620 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-21 18:57:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,687 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-21 18:57:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,701 INFO L225 Difference]: With dead ends: 3596 [2020-08-21 18:57:27,702 INFO L226 Difference]: Without dead ends: 2090 [2020-08-21 18:57:27,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-21 18:57:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-21 18:57:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-21 18:57:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-21 18:57:27,791 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-21 18:57:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,792 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-21 18:57:27,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-21 18:57:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:57:27,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:57:27,797 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-21 18:57:27,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774294151] [2020-08-21 18:57:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:27,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774294151] [2020-08-21 18:57:27,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720190416] [2020-08-21 18:57:27,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,841 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-21 18:57:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,908 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-21 18:57:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:57:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,918 INFO L225 Difference]: With dead ends: 3132 [2020-08-21 18:57:27,918 INFO L226 Difference]: Without dead ends: 2122 [2020-08-21 18:57:27,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-21 18:57:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-21 18:57:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-21 18:57:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-21 18:57:27,990 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-21 18:57:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,991 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-21 18:57:27,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-21 18:57:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:57:27,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 18:57:27,995 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-21 18:57:27,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564667937] [2020-08-21 18:57:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:28,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564667937] [2020-08-21 18:57:28,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:28,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:28,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671292844] [2020-08-21 18:57:28,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:28,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:28,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,060 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-21 18:57:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:28,129 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-21 18:57:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:28,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:57:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:28,149 INFO L225 Difference]: With dead ends: 3724 [2020-08-21 18:57:28,149 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 18:57:28,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 18:57:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-21 18:57:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-21 18:57:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-21 18:57:28,235 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-21 18:57:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:28,235 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-21 18:57:28,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-21 18:57:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:57:28,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:28,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:28,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 18:57:28,241 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:28,241 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-21 18:57:28,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:28,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178414397] [2020-08-21 18:57:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:28,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178414397] [2020-08-21 18:57:28,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:28,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:28,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89708117] [2020-08-21 18:57:28,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:28,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:28,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:28,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,276 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-21 18:57:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:28,352 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-21 18:57:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:28,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:57:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:28,371 INFO L225 Difference]: With dead ends: 7116 [2020-08-21 18:57:28,371 INFO L226 Difference]: Without dead ends: 4106 [2020-08-21 18:57:28,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-21 18:57:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-21 18:57:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-21 18:57:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-21 18:57:28,483 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-21 18:57:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:28,483 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-21 18:57:28,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-21 18:57:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 18:57:28,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:28,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:28,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 18:57:28,491 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-21 18:57:28,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:28,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089379523] [2020-08-21 18:57:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:28,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089379523] [2020-08-21 18:57:28,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:28,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:28,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767680811] [2020-08-21 18:57:28,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:28,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,519 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-21 18:57:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:28,609 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-21 18:57:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:28,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 18:57:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:28,648 INFO L225 Difference]: With dead ends: 6156 [2020-08-21 18:57:28,648 INFO L226 Difference]: Without dead ends: 4170 [2020-08-21 18:57:28,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-21 18:57:28,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-21 18:57:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-21 18:57:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-21 18:57:28,761 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-21 18:57:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:28,762 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-21 18:57:28,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-21 18:57:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 18:57:28,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:28,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:28,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 18:57:28,767 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:28,768 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-21 18:57:28,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:28,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889823521] [2020-08-21 18:57:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:28,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889823521] [2020-08-21 18:57:28,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:28,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:28,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528316574] [2020-08-21 18:57:28,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:28,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:28,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:28,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,795 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-21 18:57:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:28,911 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-21 18:57:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:28,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 18:57:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:28,937 INFO L225 Difference]: With dead ends: 12108 [2020-08-21 18:57:28,937 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 18:57:28,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 18:57:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-21 18:57:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 18:57:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-21 18:57:29,393 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-21 18:57:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:29,393 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-21 18:57:29,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-21 18:57:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 18:57:29,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:29,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:29,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 18:57:29,407 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-21 18:57:29,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:29,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153919542] [2020-08-21 18:57:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:29,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:29,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153919542] [2020-08-21 18:57:29,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:29,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:29,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939484861] [2020-08-21 18:57:29,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:29,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:29,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:29,458 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-21 18:57:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:29,596 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-21 18:57:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:29,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 18:57:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:29,615 INFO L225 Difference]: With dead ends: 9100 [2020-08-21 18:57:29,616 INFO L226 Difference]: Without dead ends: 9098 [2020-08-21 18:57:29,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-21 18:57:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-21 18:57:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 18:57:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-21 18:57:29,838 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-21 18:57:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:29,838 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-21 18:57:29,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-21 18:57:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 18:57:29,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:29,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:29,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 18:57:29,857 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-21 18:57:29,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:29,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769087596] [2020-08-21 18:57:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:29,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:29,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769087596] [2020-08-21 18:57:29,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:29,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:29,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544306849] [2020-08-21 18:57:29,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:29,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:29,913 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-21 18:57:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:30,221 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-21 18:57:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:30,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 18:57:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:30,249 INFO L225 Difference]: With dead ends: 13708 [2020-08-21 18:57:30,250 INFO L226 Difference]: Without dead ends: 13706 [2020-08-21 18:57:30,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-21 18:57:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-21 18:57:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-21 18:57:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-21 18:57:30,513 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-21 18:57:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:30,514 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-21 18:57:30,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-21 18:57:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 18:57:30,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:30,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:30,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 18:57:30,532 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-21 18:57:30,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:30,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979448956] [2020-08-21 18:57:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:30,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:30,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979448956] [2020-08-21 18:57:30,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:30,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:30,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764827641] [2020-08-21 18:57:30,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:30,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:30,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:30,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:30,558 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-21 18:57:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:30,793 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-21 18:57:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:30,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 18:57:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:30,829 INFO L225 Difference]: With dead ends: 27788 [2020-08-21 18:57:30,829 INFO L226 Difference]: Without dead ends: 15754 [2020-08-21 18:57:31,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-21 18:57:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-21 18:57:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-21 18:57:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-21 18:57:31,509 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-21 18:57:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:31,509 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-21 18:57:31,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-21 18:57:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 18:57:31,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:31,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:31,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 18:57:31,529 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-21 18:57:31,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:31,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167667236] [2020-08-21 18:57:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:31,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:31,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167667236] [2020-08-21 18:57:31,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:31,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:31,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706117502] [2020-08-21 18:57:31,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:31,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:31,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:31,557 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-21 18:57:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:32,171 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-21 18:57:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:32,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 18:57:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:32,203 INFO L225 Difference]: With dead ends: 23820 [2020-08-21 18:57:32,203 INFO L226 Difference]: Without dead ends: 16138 [2020-08-21 18:57:32,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-21 18:57:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-21 18:57:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-21 18:57:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-21 18:57:32,543 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-21 18:57:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:32,544 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-21 18:57:32,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-21 18:57:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 18:57:32,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:32,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:32,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 18:57:32,563 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-21 18:57:32,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:32,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865628158] [2020-08-21 18:57:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:32,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:32,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865628158] [2020-08-21 18:57:32,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:32,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:32,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336215064] [2020-08-21 18:57:32,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:32,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:32,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:32,589 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-21 18:57:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:32,880 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-21 18:57:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:32,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 18:57:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:32,936 INFO L225 Difference]: With dead ends: 26636 [2020-08-21 18:57:32,937 INFO L226 Difference]: Without dead ends: 26634 [2020-08-21 18:57:32,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-21 18:57:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-21 18:57:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-21 18:57:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-21 18:57:33,501 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-21 18:57:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,502 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-21 18:57:33,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-21 18:57:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 18:57:33,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:33,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 18:57:33,540 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-21 18:57:33,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418224925] [2020-08-21 18:57:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418224925] [2020-08-21 18:57:33,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367604276] [2020-08-21 18:57:33,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,568 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-21 18:57:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,061 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-21 18:57:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:34,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 18:57:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,127 INFO L225 Difference]: With dead ends: 55308 [2020-08-21 18:57:34,127 INFO L226 Difference]: Without dead ends: 31242 [2020-08-21 18:57:34,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-21 18:57:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-21 18:57:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-21 18:57:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-21 18:57:34,782 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-21 18:57:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,782 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-21 18:57:34,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-21 18:57:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:57:34,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:34,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 18:57:34,817 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-21 18:57:34,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324728273] [2020-08-21 18:57:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324728273] [2020-08-21 18:57:34,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831232611] [2020-08-21 18:57:34,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,850 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-21 18:57:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:35,395 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-21 18:57:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:35,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 18:57:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:35,454 INFO L225 Difference]: With dead ends: 46860 [2020-08-21 18:57:35,455 INFO L226 Difference]: Without dead ends: 31754 [2020-08-21 18:57:35,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-21 18:57:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-21 18:57:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-21 18:57:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-21 18:57:36,051 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-21 18:57:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:36,051 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-21 18:57:36,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-21 18:57:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:57:36,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:36,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:36,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 18:57:36,079 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-21 18:57:36,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:36,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513317445] [2020-08-21 18:57:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:36,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:36,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513317445] [2020-08-21 18:57:36,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:36,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:36,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194978174] [2020-08-21 18:57:36,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:36,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:36,106 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-21 18:57:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:36,900 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-21 18:57:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:36,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 18:57:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:36,976 INFO L225 Difference]: With dead ends: 51210 [2020-08-21 18:57:36,976 INFO L226 Difference]: Without dead ends: 51208 [2020-08-21 18:57:36,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-21 18:57:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-21 18:57:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-21 18:57:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-21 18:57:37,904 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-21 18:57:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:37,905 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-21 18:57:37,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-21 18:57:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:57:37,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:37,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:37,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 18:57:37,973 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:37,973 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-21 18:57:37,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:37,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143104879] [2020-08-21 18:57:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:38,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143104879] [2020-08-21 18:57:38,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:38,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:38,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045319941] [2020-08-21 18:57:38,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:38,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:38,005 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-21 18:57:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:39,006 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-21 18:57:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:39,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 18:57:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:39,008 INFO L225 Difference]: With dead ends: 109576 [2020-08-21 18:57:39,008 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:57:39,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:57:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:57:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:57:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:57:39,111 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-21 18:57:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:39,112 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:57:39,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:57:39,112 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:57:39,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 18:57:39,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:57:39,141 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:57:39,141 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:57:39,141 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:57:39,141 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:57:39,141 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:57:39,141 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:57:39,141 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-21 18:57:39,142 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-21 18:57:39,142 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-21 18:57:39,142 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-21 18:57:39,142 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-21 18:57:39,142 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-21 18:57:39,142 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,142 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-21 18:57:39,143 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,144 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-21 18:57:39,144 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,144 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,144 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-21 18:57:39,144 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-21 18:57:39,144 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-21 18:57:39,144 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-21 18:57:39,144 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,145 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,145 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-21 18:57:39,145 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-21 18:57:39,145 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-21 18:57:39,145 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,145 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,145 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,145 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,145 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,146 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,146 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,146 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-21 18:57:39,146 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-21 18:57:39,146 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,146 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 18:57:39,146 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-21 18:57:39,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:57:39 BoogieIcfgContainer [2020-08-21 18:57:39,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:57:39,161 INFO L168 Benchmark]: Toolchain (without parser) took 14816.72 ms. Allocated memory was 139.5 MB in the beginning and 922.2 MB in the end (delta: 782.8 MB). Free memory was 102.1 MB in the beginning and 415.4 MB in the end (delta: -313.3 MB). Peak memory consumption was 469.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:39,165 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-21 18:57:39,165 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.39 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 90.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:39,168 INFO L168 Benchmark]: Boogie Preprocessor took 141.51 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 90.9 MB in the beginning and 178.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:39,169 INFO L168 Benchmark]: RCFGBuilder took 419.70 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: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:39,169 INFO L168 Benchmark]: TraceAbstraction took 13905.71 ms. Allocated memory was 200.8 MB in the beginning and 922.2 MB in the end (delta: 721.4 MB). Free memory was 157.4 MB in the beginning and 415.4 MB in the end (delta: -258.0 MB). Peak memory consumption was 463.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:39,171 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.39 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 90.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.51 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 90.9 MB in the beginning and 178.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.70 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: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13905.71 ms. Allocated memory was 200.8 MB in the beginning and 922.2 MB in the end (delta: 721.4 MB). Free memory was 157.4 MB in the beginning and 415.4 MB in the end (delta: -258.0 MB). Peak memory consumption was 463.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.7s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...