/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:10:33,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:10:33,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:10:33,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:10:33,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:10:33,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:10:33,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:10:33,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:10:33,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:10:33,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:10:33,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:10:33,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:10:33,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:10:33,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:10:33,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:10:33,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:10:33,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:10:33,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:10:33,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:10:33,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:10:33,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:10:33,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:10:33,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:10:33,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:10:33,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:10:33,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:10:33,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:10:33,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:10:33,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:10:33,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:10:33,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:10:33,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:10:33,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:10:33,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:10:33,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:10:33,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:10:33,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:10:33,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:10:33,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:10:33,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:10:33,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:10:33,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 16:10:33,464 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:10:33,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:10:33,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:10:33,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:10:33,466 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:10:33,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:10:33,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:10:33,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:10:33,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:10:33,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:10:33,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:10:33,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:10:33,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:10:33,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:10:33,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:10:33,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:10:33,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:10:33,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:10:33,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:10:33,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:10:33,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:10:33,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:33,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:10:33,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:10:33,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:10:33,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:10:33,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:10:33,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:10:33,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:10:33,471 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:10:33,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:10:33,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:10:33,951 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:10:33,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:10:33,954 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:10:33,956 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-24 16:10:34,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7065a7564/3e04819fc3c84791a33c91dcaae9845f/FLAG15bdae205 [2020-09-24 16:10:34,669 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:10:34,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-24 16:10:34,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7065a7564/3e04819fc3c84791a33c91dcaae9845f/FLAG15bdae205 [2020-09-24 16:10:34,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7065a7564/3e04819fc3c84791a33c91dcaae9845f [2020-09-24 16:10:34,989 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:10:34,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:10:34,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:34,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:10:35,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:10:35,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:34" (1/1) ... [2020-09-24 16:10:35,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d876c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35, skipping insertion in model container [2020-09-24 16:10:35,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:34" (1/1) ... [2020-09-24 16:10:35,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:10:35,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:10:35,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:35,267 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:10:35,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:35,310 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:10:35,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35 WrapperNode [2020-09-24 16:10:35,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:35,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:10:35,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:10:35,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:10:35,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:10:35,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:10:35,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:10:35,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:10:35,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:35,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:10:35,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:10:35,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:10:35,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:10:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:10:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:10:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:10:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 16:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 16:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 16:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 16:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:10:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:10:35,742 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:10:35,742 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:10:35,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:35 BoogieIcfgContainer [2020-09-24 16:10:35,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:10:35,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:10:35,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:10:35,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:10:35,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:34" (1/3) ... [2020-09-24 16:10:35,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f828a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:35, skipping insertion in model container [2020-09-24 16:10:35,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (2/3) ... [2020-09-24 16:10:35,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f828a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:35, skipping insertion in model container [2020-09-24 16:10:35,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:35" (3/3) ... [2020-09-24 16:10:35,760 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-09-24 16:10:35,780 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:10:35,791 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:10:35,822 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:10:35,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:10:35,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:10:35,861 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:10:35,861 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:10:35,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:10:35,861 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:10:35,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:10:35,862 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:10:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-24 16:10:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 16:10:35,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:35,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:35,914 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:35,922 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-09-24 16:10:35,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:35,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655391182] [2020-09-24 16:10:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,081 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,081 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,081 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,082 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:10:36,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:10:36,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 16:10:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:36,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:36,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,184 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,185 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,185 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,185 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:36,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:36,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 16:10:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:36,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655391182] [2020-09-24 16:10:36,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:36,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:10:36,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474152256] [2020-09-24 16:10:36,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:10:36,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:36,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:10:36,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:36,238 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-09-24 16:10:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:36,351 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-09-24 16:10:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:10:36,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-24 16:10:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:36,364 INFO L225 Difference]: With dead ends: 45 [2020-09-24 16:10:36,364 INFO L226 Difference]: Without dead ends: 21 [2020-09-24 16:10:36,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-24 16:10:36,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-24 16:10:36,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 16:10:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-24 16:10:36,417 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-24 16:10:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:36,418 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-24 16:10:36,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:10:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-24 16:10:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 16:10:36,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:36,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:36,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:10:36,421 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-09-24 16:10:36,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:36,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285434891] [2020-09-24 16:10:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,460 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,460 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,460 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,462 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:10:36,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 16:10:36,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:10:36,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:36,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,521 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,521 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,522 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,522 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:36,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:36,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:36,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:36,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285434891] [2020-09-24 16:10:36,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:36,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:10:36,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358749162] [2020-09-24 16:10:36,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:10:36,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:10:36,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:36,538 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-09-24 16:10:36,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:36,607 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-24 16:10:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:10:36,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-24 16:10:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:36,609 INFO L225 Difference]: With dead ends: 31 [2020-09-24 16:10:36,610 INFO L226 Difference]: Without dead ends: 25 [2020-09-24 16:10:36,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-24 16:10:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-24 16:10:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 16:10:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 16:10:36,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 16:10:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:36,620 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 16:10:36,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:10:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 16:10:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 16:10:36,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:36,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:36,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:10:36,622 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:36,623 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-09-24 16:10:36,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:36,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267872901] [2020-09-24 16:10:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,662 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,662 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,662 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,663 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 16:10:36,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 16:10:36,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 16:10:36,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:36,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,743 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,743 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,743 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,744 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:36,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:36,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:36,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:36,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:36,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:36,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267872901] [2020-09-24 16:10:36,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:36,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 16:10:36,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139734463] [2020-09-24 16:10:36,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:10:36,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:10:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:36,757 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-09-24 16:10:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:36,868 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-24 16:10:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 16:10:36,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-24 16:10:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:36,871 INFO L225 Difference]: With dead ends: 36 [2020-09-24 16:10:36,871 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 16:10:36,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 16:10:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-24 16:10:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 16:10:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 16:10:36,879 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 16:10:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:36,880 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 16:10:36,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:10:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 16:10:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 16:10:36,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:36,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:36,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:10:36,882 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-09-24 16:10:36,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:36,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878261099] [2020-09-24 16:10:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,923 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,923 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,924 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,924 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 16:10:36,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 16:10:36,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 16:10:36,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:37,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,018 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,019 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,020 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,021 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:37,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:10:37,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:37,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878261099] [2020-09-24 16:10:37,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:37,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 16:10:37,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270767413] [2020-09-24 16:10:37,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:37,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:37,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:37,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:37,053 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-24 16:10:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:37,194 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-24 16:10:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 16:10:37,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-24 16:10:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:37,196 INFO L225 Difference]: With dead ends: 41 [2020-09-24 16:10:37,196 INFO L226 Difference]: Without dead ends: 35 [2020-09-24 16:10:37,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-24 16:10:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-24 16:10:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 16:10:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 16:10:37,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 16:10:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:37,205 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 16:10:37,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 16:10:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 16:10:37,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:37,207 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:37,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:10:37,208 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:37,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-09-24 16:10:37,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:37,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087843478] [2020-09-24 16:10:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,253 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,254 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,254 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,254 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:10:37,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 16:10:37,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:37,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:37,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 16:10:37,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,391 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,392 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,392 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,392 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:37,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:37,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:37,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:37,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087843478] [2020-09-24 16:10:37,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:37,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 16:10:37,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945709077] [2020-09-24 16:10:37,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:10:37,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:37,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:10:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:10:37,403 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-09-24 16:10:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:37,590 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-24 16:10:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 16:10:37,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-24 16:10:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:37,592 INFO L225 Difference]: With dead ends: 46 [2020-09-24 16:10:37,592 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 16:10:37,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 16:10:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-24 16:10:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 16:10:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 16:10:37,600 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-24 16:10:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:37,601 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 16:10:37,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:10:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 16:10:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 16:10:37,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:37,603 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:37,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:10:37,603 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-09-24 16:10:37,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:37,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507669978] [2020-09-24 16:10:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,678 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,678 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,679 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,681 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 16:10:37,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 16:10:37,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:37,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:37,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 16:10:37,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:37,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,832 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,832 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,832 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,833 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:37,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:10:37,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:37,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 16:10:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:37,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507669978] [2020-09-24 16:10:37,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:37,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 16:10:37,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945053576] [2020-09-24 16:10:37,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 16:10:37,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:37,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 16:10:37,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:37,851 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-09-24 16:10:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:38,093 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-24 16:10:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 16:10:38,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-09-24 16:10:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:38,096 INFO L225 Difference]: With dead ends: 51 [2020-09-24 16:10:38,096 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 16:10:38,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 16:10:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 16:10:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-24 16:10:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 16:10:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 16:10:38,105 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-24 16:10:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:38,106 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 16:10:38,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 16:10:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 16:10:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 16:10:38,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:38,108 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:38,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:10:38,108 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-09-24 16:10:38,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:38,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321804579] [2020-09-24 16:10:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,166 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,167 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,167 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,167 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 16:10:38,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 16:10:38,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:10:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 16:10:38,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:38,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,367 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,367 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,367 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,368 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:38,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:38,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:38,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:38,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:38,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:38,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321804579] [2020-09-24 16:10:38,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:38,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 16:10:38,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035007350] [2020-09-24 16:10:38,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 16:10:38,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 16:10:38,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 16:10:38,379 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-09-24 16:10:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:38,602 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-24 16:10:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 16:10:38,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-09-24 16:10:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:38,604 INFO L225 Difference]: With dead ends: 56 [2020-09-24 16:10:38,604 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 16:10:38,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 16:10:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 16:10:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-24 16:10:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 16:10:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-24 16:10:38,612 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-24 16:10:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:38,612 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-24 16:10:38,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 16:10:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-24 16:10:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 16:10:38,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:38,614 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:38,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:10:38,614 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:38,615 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-09-24 16:10:38,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:38,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710124864] [2020-09-24 16:10:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,672 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,672 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,672 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,672 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 16:10:38,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 16:10:38,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:10:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 16:10:38,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:38,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,845 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,846 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,846 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,846 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:38,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:38,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:38,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:38,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710124864] [2020-09-24 16:10:38,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:38,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 16:10:38,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918376991] [2020-09-24 16:10:38,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 16:10:38,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:38,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 16:10:38,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:38,862 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-09-24 16:10:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:39,182 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-09-24 16:10:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 16:10:39,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-09-24 16:10:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:39,184 INFO L225 Difference]: With dead ends: 61 [2020-09-24 16:10:39,184 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 16:10:39,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 16:10:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 16:10:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-24 16:10:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 16:10:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-24 16:10:39,197 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-24 16:10:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:39,197 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-24 16:10:39,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 16:10:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-24 16:10:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 16:10:39,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:39,201 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:39,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:10:39,202 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-09-24 16:10:39,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:39,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233752607] [2020-09-24 16:10:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,292 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,292 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,293 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,293 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 16:10:39,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 16:10:39,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:10:39,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:39,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 16:10:39,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:39,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,563 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,564 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,564 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,564 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:39,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:39,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:39,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:39,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:39,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:39,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233752607] [2020-09-24 16:10:39,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:39,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 16:10:39,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693240188] [2020-09-24 16:10:39,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 16:10:39,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 16:10:39,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 16:10:39,573 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-09-24 16:10:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:39,955 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-24 16:10:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 16:10:39,956 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-09-24 16:10:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:39,957 INFO L225 Difference]: With dead ends: 66 [2020-09-24 16:10:39,957 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 16:10:39,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 16:10:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 16:10:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-09-24 16:10:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 16:10:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-24 16:10:39,964 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-24 16:10:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:39,965 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-24 16:10:39,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 16:10:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-24 16:10:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 16:10:39,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:39,966 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:39,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:10:39,967 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:39,967 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-09-24 16:10:39,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:39,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448546963] [2020-09-24 16:10:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,032 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,032 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,032 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,033 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 16:10:40,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 16:10:40,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:10:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 16:10:40,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,250 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,250 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,250 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,250 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:40,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:40,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:40,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:40,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:40,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448546963] [2020-09-24 16:10:40,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:40,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 16:10:40,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478299354] [2020-09-24 16:10:40,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 16:10:40,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:40,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 16:10:40,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 16:10:40,261 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-09-24 16:10:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:40,717 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-24 16:10:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 16:10:40,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-09-24 16:10:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:40,718 INFO L225 Difference]: With dead ends: 71 [2020-09-24 16:10:40,718 INFO L226 Difference]: Without dead ends: 65 [2020-09-24 16:10:40,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 16:10:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-24 16:10:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-24 16:10:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 16:10:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-24 16:10:40,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-24 16:10:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:40,734 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-24 16:10:40,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 16:10:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-24 16:10:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 16:10:40,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:40,736 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:40,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:10:40,737 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-09-24 16:10:40,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:40,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285204987] [2020-09-24 16:10:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,812 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,813 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,813 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,813 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 16:10:40,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:41,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:41,051 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:41,051 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:41,051 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:41,052 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:41,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:41,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:41,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:41,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:41,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:41,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:41,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285204987] [2020-09-24 16:10:41,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:41,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 16:10:41,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141904810] [2020-09-24 16:10:41,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 16:10:41,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:41,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 16:10:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 16:10:41,073 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-09-24 16:10:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:41,616 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-09-24 16:10:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 16:10:41,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-09-24 16:10:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:41,618 INFO L225 Difference]: With dead ends: 76 [2020-09-24 16:10:41,618 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 16:10:41,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 16:10:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 16:10:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-24 16:10:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 16:10:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-24 16:10:41,627 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-24 16:10:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:41,627 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-24 16:10:41,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 16:10:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-24 16:10:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 16:10:41,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:41,629 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:41,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:10:41,629 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-09-24 16:10:41,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:41,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402307513] [2020-09-24 16:10:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:41,717 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:41,717 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:41,717 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:41,717 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:41,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 16:10:41,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 16:10:41,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:10:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:41,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 16:10:41,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:41,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,000 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,001 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,001 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,001 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:42,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:42,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:42,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:42,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402307513] [2020-09-24 16:10:42,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:42,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 16:10:42,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687819920] [2020-09-24 16:10:42,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 16:10:42,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:42,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 16:10:42,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 16:10:42,017 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-09-24 16:10:42,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:42,547 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-09-24 16:10:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 16:10:42,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-09-24 16:10:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:42,549 INFO L225 Difference]: With dead ends: 81 [2020-09-24 16:10:42,549 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 16:10:42,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 16:10:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 16:10:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-24 16:10:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 16:10:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-24 16:10:42,557 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-09-24 16:10:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:42,557 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-24 16:10:42,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 16:10:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-24 16:10:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 16:10:42,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:42,559 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:42,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:10:42,559 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-09-24 16:10:42,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:42,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349212917] [2020-09-24 16:10:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,660 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,660 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,660 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,661 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 16:10:42,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 16:10:42,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:10:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 16:10:42,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,060 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,060 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,060 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,060 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:43,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:43,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:43,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349212917] [2020-09-24 16:10:43,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:43,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 16:10:43,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171702465] [2020-09-24 16:10:43,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 16:10:43,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 16:10:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 16:10:43,071 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 26 states. [2020-09-24 16:10:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:43,731 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-09-24 16:10:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 16:10:43,732 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-09-24 16:10:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:43,733 INFO L225 Difference]: With dead ends: 86 [2020-09-24 16:10:43,733 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 16:10:43,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 16:10:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 16:10:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-09-24 16:10:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 16:10:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-24 16:10:43,741 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-09-24 16:10:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:43,741 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-24 16:10:43,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 16:10:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-24 16:10:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 16:10:43,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:43,743 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:43,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:10:43,743 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash 728586489, now seen corresponding path program 12 times [2020-09-24 16:10:43,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:43,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882418129] [2020-09-24 16:10:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,848 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,848 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,848 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,848 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 16:10:43,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-24 16:10:43,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:10:43,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:43,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 16:10:43,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,322 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,322 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,322 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,322 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:44,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:44,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882418129] [2020-09-24 16:10:44,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:44,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 16:10:44,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599024810] [2020-09-24 16:10:44,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 16:10:44,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 16:10:44,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-24 16:10:44,334 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 28 states. [2020-09-24 16:10:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,136 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-09-24 16:10:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 16:10:45,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2020-09-24 16:10:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,138 INFO L225 Difference]: With dead ends: 91 [2020-09-24 16:10:45,138 INFO L226 Difference]: Without dead ends: 85 [2020-09-24 16:10:45,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 16:10:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-24 16:10:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-24 16:10:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-24 16:10:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-09-24 16:10:45,145 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-09-24 16:10:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,146 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-09-24 16:10:45,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 16:10:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-09-24 16:10:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 16:10:45,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,148 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:45,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:10:45,148 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1576153495, now seen corresponding path program 13 times [2020-09-24 16:10:45,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765457814] [2020-09-24 16:10:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,273 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 16:10:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:45,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,702 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,702 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,702 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,702 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:45,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:45,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:45,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:45,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765457814] [2020-09-24 16:10:45,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:45,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 16:10:45,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403907782] [2020-09-24 16:10:45,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 16:10:45,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 16:10:45,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 16:10:45,717 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 30 states. [2020-09-24 16:10:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:46,553 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-09-24 16:10:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 16:10:46,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-09-24 16:10:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:46,554 INFO L225 Difference]: With dead ends: 96 [2020-09-24 16:10:46,555 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 16:10:46,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 16:10:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 16:10:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-09-24 16:10:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-24 16:10:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-09-24 16:10:46,562 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-09-24 16:10:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:46,563 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-09-24 16:10:46,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 16:10:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-09-24 16:10:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 16:10:46,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:46,564 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:46,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:10:46,565 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1034810439, now seen corresponding path program 14 times [2020-09-24 16:10:46,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:46,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044346664] [2020-09-24 16:10:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,738 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,739 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,739 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,739 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-24 16:10:46,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-09-24 16:10:46,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:10:46,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:46,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 16:10:46,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:47,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:47,398 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:47,398 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:47,399 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:47,399 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:47,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:47,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:47,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:47,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:47,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:47,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:47,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:47,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044346664] [2020-09-24 16:10:47,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:47,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 16:10:47,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745165795] [2020-09-24 16:10:47,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 16:10:47,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:47,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 16:10:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-24 16:10:47,432 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 32 states. [2020-09-24 16:10:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:48,342 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-09-24 16:10:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 16:10:48,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 86 [2020-09-24 16:10:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:48,344 INFO L225 Difference]: With dead ends: 101 [2020-09-24 16:10:48,344 INFO L226 Difference]: Without dead ends: 95 [2020-09-24 16:10:48,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-24 16:10:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-24 16:10:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-09-24 16:10:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 16:10:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-09-24 16:10:48,359 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-09-24 16:10:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:48,363 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-09-24 16:10:48,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 16:10:48,364 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-09-24 16:10:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 16:10:48,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:48,367 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:48,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:10:48,367 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:48,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:48,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2077177559, now seen corresponding path program 15 times [2020-09-24 16:10:48,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:48,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420330309] [2020-09-24 16:10:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:48,577 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:48,578 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:48,578 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:48,578 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:48,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-24 16:10:48,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:48,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-09-24 16:10:48,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:10:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 16:10:48,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:49,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:49,165 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:49,166 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:49,166 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:49,166 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:49,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:49,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:49,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:49,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:49,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:49,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:49,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:49,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:49,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420330309] [2020-09-24 16:10:49,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:49,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 16:10:49,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108306124] [2020-09-24 16:10:49,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 16:10:49,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:49,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-24 16:10:49,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 16:10:49,179 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 34 states. [2020-09-24 16:10:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:50,272 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-09-24 16:10:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-24 16:10:50,273 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2020-09-24 16:10:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:50,275 INFO L225 Difference]: With dead ends: 106 [2020-09-24 16:10:50,275 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 16:10:50,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 16:10:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 16:10:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-09-24 16:10:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-24 16:10:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-09-24 16:10:50,281 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-09-24 16:10:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:50,282 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-09-24 16:10:50,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-24 16:10:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-09-24 16:10:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 16:10:50,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:50,283 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:50,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:10:50,284 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1140437383, now seen corresponding path program 16 times [2020-09-24 16:10:50,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:50,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581067277] [2020-09-24 16:10:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:50,443 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:50,444 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:50,444 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:50,444 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:50,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 16:10:50,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:50,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-24 16:10:50,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:50,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:10:50,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:50,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 16:10:50,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:51,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:51,158 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:51,158 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:51,159 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:51,159 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:51,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:51,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:51,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:10:51,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:51,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:51,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:51,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:51,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:51,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581067277] [2020-09-24 16:10:51,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:51,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-24 16:10:51,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98270966] [2020-09-24 16:10:51,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-24 16:10:51,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:51,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-24 16:10:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 16:10:51,170 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 36 states. [2020-09-24 16:10:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:52,345 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-09-24 16:10:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 16:10:52,345 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 96 [2020-09-24 16:10:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:52,347 INFO L225 Difference]: With dead ends: 111 [2020-09-24 16:10:52,347 INFO L226 Difference]: Without dead ends: 105 [2020-09-24 16:10:52,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-24 16:10:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-24 16:10:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-09-24 16:10:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-24 16:10:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-09-24 16:10:52,355 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2020-09-24 16:10:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:52,355 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-09-24 16:10:52,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-24 16:10:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-09-24 16:10:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-24 16:10:52,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:52,356 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:52,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:10:52,357 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1511435287, now seen corresponding path program 17 times [2020-09-24 16:10:52,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:52,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293619122] [2020-09-24 16:10:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:52,544 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:52,544 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:52,544 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:52,545 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:52,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-09-24 16:10:52,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:52,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-24 16:10:52,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:10:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-09-24 16:10:52,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:53,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:53,188 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:53,188 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:53,188 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:53,189 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:53,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:53,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:53,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:53,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:53,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293619122] [2020-09-24 16:10:53,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:53,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-24 16:10:53,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217522324] [2020-09-24 16:10:53,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-24 16:10:53,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-24 16:10:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 16:10:53,208 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 38 states. [2020-09-24 16:10:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:54,471 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-09-24 16:10:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-24 16:10:54,471 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-09-24 16:10:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:54,473 INFO L225 Difference]: With dead ends: 116 [2020-09-24 16:10:54,473 INFO L226 Difference]: Without dead ends: 110 [2020-09-24 16:10:54,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-24 16:10:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-24 16:10:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-09-24 16:10:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 16:10:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-09-24 16:10:54,479 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2020-09-24 16:10:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:54,480 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-09-24 16:10:54,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-24 16:10:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-09-24 16:10:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 16:10:54,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:54,481 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:54,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 16:10:54,482 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:54,482 INFO L82 PathProgramCache]: Analyzing trace with hash -967433927, now seen corresponding path program 18 times [2020-09-24 16:10:54,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:54,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035955566] [2020-09-24 16:10:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:54,666 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:54,666 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:54,667 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:54,667 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:54,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-09-24 16:10:54,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:54,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-09-24 16:10:54,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:10:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 16:10:54,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:55,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:55,612 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:55,613 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:55,613 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:55,613 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:55,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:55,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:55,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:55,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:55,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:55,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:55,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035955566] [2020-09-24 16:10:55,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:55,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-24 16:10:55,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429069685] [2020-09-24 16:10:55,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-24 16:10:55,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:55,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-24 16:10:55,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 16:10:55,645 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 40 states. [2020-09-24 16:10:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:57,030 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-09-24 16:10:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-09-24 16:10:57,031 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 106 [2020-09-24 16:10:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:57,032 INFO L225 Difference]: With dead ends: 121 [2020-09-24 16:10:57,032 INFO L226 Difference]: Without dead ends: 115 [2020-09-24 16:10:57,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-09-24 16:10:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-24 16:10:57,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-09-24 16:10:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-24 16:10:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-09-24 16:10:57,040 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2020-09-24 16:10:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:57,040 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-09-24 16:10:57,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-24 16:10:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-09-24 16:10:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-24 16:10:57,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:57,042 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:57,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 16:10:57,042 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash 175935831, now seen corresponding path program 19 times [2020-09-24 16:10:57,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:57,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633605984] [2020-09-24 16:10:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:57,286 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:57,289 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:57,289 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:57,289 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:57,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-24 16:10:57,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:57,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-09-24 16:10:57,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:57,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 16:10:57,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:57,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-24 16:10:57,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:58,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:58,145 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:58,145 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:58,145 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:58,145 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:58,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:58,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:58,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:58,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:58,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:58,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:58,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:58,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:58,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633605984] [2020-09-24 16:10:58,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:58,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-24 16:10:58,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613766821] [2020-09-24 16:10:58,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-24 16:10:58,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:58,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-24 16:10:58,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 16:10:58,168 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 42 states. [2020-09-24 16:10:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:59,758 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-09-24 16:10:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-24 16:10:59,759 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 111 [2020-09-24 16:10:59,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:59,760 INFO L225 Difference]: With dead ends: 126 [2020-09-24 16:10:59,760 INFO L226 Difference]: Without dead ends: 120 [2020-09-24 16:10:59,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-09-24 16:10:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-24 16:10:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-09-24 16:10:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-24 16:10:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-09-24 16:10:59,771 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2020-09-24 16:10:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:59,772 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-09-24 16:10:59,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-24 16:10:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-09-24 16:10:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-24 16:10:59,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:59,773 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:59,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 16:10:59,774 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1072856071, now seen corresponding path program 20 times [2020-09-24 16:10:59,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:59,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388507065] [2020-09-24 16:10:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:00,054 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:00,055 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:00,055 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:00,055 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:00,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-09-24 16:11:00,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:00,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-09-24 16:11:00,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:00,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 16:11:00,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-24 16:11:00,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:01,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:01,010 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:01,010 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:01,011 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:01,011 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:01,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:01,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:01,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:01,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:01,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:01,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:01,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:01,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:01,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388507065] [2020-09-24 16:11:01,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:01,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-24 16:11:01,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449702948] [2020-09-24 16:11:01,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-24 16:11:01,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-24 16:11:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 16:11:01,030 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 44 states. [2020-09-24 16:11:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:02,675 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-09-24 16:11:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-24 16:11:02,678 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-09-24 16:11:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:02,680 INFO L225 Difference]: With dead ends: 131 [2020-09-24 16:11:02,680 INFO L226 Difference]: Without dead ends: 125 [2020-09-24 16:11:02,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-09-24 16:11:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-24 16:11:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-09-24 16:11:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-24 16:11:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-09-24 16:11:02,691 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2020-09-24 16:11:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:02,692 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-09-24 16:11:02,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-24 16:11:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-09-24 16:11:02,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-24 16:11:02,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:02,693 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:02,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 16:11:02,693 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash 229959319, now seen corresponding path program 21 times [2020-09-24 16:11:02,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:02,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986507532] [2020-09-24 16:11:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:02,997 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:02,997 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:02,997 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:02,998 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:02,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-09-24 16:11:02,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:02,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-09-24 16:11:02,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:02,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-24 16:11:02,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:02,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-09-24 16:11:02,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:04,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:04,060 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:04,060 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:04,061 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:04,061 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:04,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:04,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:04,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:04,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:04,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:04,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:04,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:04,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:04,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986507532] [2020-09-24 16:11:04,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:04,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-24 16:11:04,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428916904] [2020-09-24 16:11:04,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-24 16:11:04,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:04,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-24 16:11:04,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 16:11:04,077 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 46 states. [2020-09-24 16:11:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:05,957 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-09-24 16:11:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-24 16:11:05,958 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 121 [2020-09-24 16:11:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:05,959 INFO L225 Difference]: With dead ends: 136 [2020-09-24 16:11:05,960 INFO L226 Difference]: Without dead ends: 130 [2020-09-24 16:11:05,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-09-24 16:11:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-24 16:11:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-09-24 16:11:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 16:11:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-09-24 16:11:05,967 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2020-09-24 16:11:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:05,967 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-09-24 16:11:05,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-24 16:11:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-09-24 16:11:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-24 16:11:05,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:05,968 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:05,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 16:11:05,969 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2029549241, now seen corresponding path program 22 times [2020-09-24 16:11:05,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:05,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266171309] [2020-09-24 16:11:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:06,254 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:06,254 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:06,254 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:06,254 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:06,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-09-24 16:11:06,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:06,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-09-24 16:11:06,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-09-24 16:11:06,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:06,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-24 16:11:06,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:07,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:07,514 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:07,514 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:07,515 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:07,515 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:07,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:07,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:07,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:07,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:07,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:07,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:07,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:07,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:07,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266171309] [2020-09-24 16:11:07,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:07,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-24 16:11:07,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690335125] [2020-09-24 16:11:07,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-24 16:11:07,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:07,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-24 16:11:07,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 16:11:07,530 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 48 states. [2020-09-24 16:11:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:09,469 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-09-24 16:11:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-09-24 16:11:09,470 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 126 [2020-09-24 16:11:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:09,471 INFO L225 Difference]: With dead ends: 141 [2020-09-24 16:11:09,471 INFO L226 Difference]: Without dead ends: 135 [2020-09-24 16:11:09,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-09-24 16:11:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-24 16:11:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-09-24 16:11:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-24 16:11:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-09-24 16:11:09,477 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2020-09-24 16:11:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:09,477 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-09-24 16:11:09,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-24 16:11:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-09-24 16:11:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 16:11:09,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:09,479 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:09,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 16:11:09,479 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:09,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1821135913, now seen corresponding path program 23 times [2020-09-24 16:11:09,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:09,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480798937] [2020-09-24 16:11:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:09,782 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:09,782 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:09,782 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:09,782 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:09,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 16:11:09,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:09,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-09-24 16:11:09,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:09,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-09-24 16:11:09,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-24 16:11:09,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:11,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:11,022 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:11,022 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:11,022 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:11,023 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:11,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:11,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:11,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:11,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:11,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:11,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:11,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:11,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:11,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480798937] [2020-09-24 16:11:11,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:11,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-24 16:11:11,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282526470] [2020-09-24 16:11:11,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-24 16:11:11,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:11,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-24 16:11:11,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-09-24 16:11:11,039 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 50 states. [2020-09-24 16:11:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:13,347 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-09-24 16:11:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-09-24 16:11:13,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 131 [2020-09-24 16:11:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:13,350 INFO L225 Difference]: With dead ends: 146 [2020-09-24 16:11:13,350 INFO L226 Difference]: Without dead ends: 140 [2020-09-24 16:11:13,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-09-24 16:11:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-24 16:11:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-09-24 16:11:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-24 16:11:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-09-24 16:11:13,356 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2020-09-24 16:11:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:13,357 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-09-24 16:11:13,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-24 16:11:13,357 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-09-24 16:11:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 16:11:13,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:13,358 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:13,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 16:11:13,358 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:13,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1910700409, now seen corresponding path program 24 times [2020-09-24 16:11:13,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:13,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17748011] [2020-09-24 16:11:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:13,705 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:13,706 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:13,706 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:13,706 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:13,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-24 16:11:13,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:13,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-09-24 16:11:13,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:13,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-09-24 16:11:13,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:13,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-24 16:11:13,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:15,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:15,184 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:15,184 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:15,184 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:15,185 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:15,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:15,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:15,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:15,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:15,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:15,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:15,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:15,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:15,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17748011] [2020-09-24 16:11:15,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:15,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-24 16:11:15,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032700996] [2020-09-24 16:11:15,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-24 16:11:15,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:15,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-24 16:11:15,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 16:11:15,203 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 52 states. [2020-09-24 16:11:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:17,620 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-09-24 16:11:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-09-24 16:11:17,621 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 136 [2020-09-24 16:11:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:17,622 INFO L225 Difference]: With dead ends: 151 [2020-09-24 16:11:17,623 INFO L226 Difference]: Without dead ends: 145 [2020-09-24 16:11:17,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-09-24 16:11:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-24 16:11:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-09-24 16:11:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-24 16:11:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-09-24 16:11:17,629 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2020-09-24 16:11:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:17,630 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-09-24 16:11:17,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-24 16:11:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-09-24 16:11:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-24 16:11:17,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:17,631 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:17,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 16:11:17,631 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:17,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1167269609, now seen corresponding path program 25 times [2020-09-24 16:11:17,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:17,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266728309] [2020-09-24 16:11:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:18,052 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:18,053 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:18,054 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:18,054 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:18,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 16:11:18,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-09-24 16:11:18,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-09-24 16:11:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-24 16:11:18,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:19,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:19,633 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:19,633 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:19,633 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:19,633 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:19,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:19,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:19,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:19,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:19,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:19,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266728309] [2020-09-24 16:11:19,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:19,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-09-24 16:11:19,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614412739] [2020-09-24 16:11:19,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-24 16:11:19,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:19,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-24 16:11:19,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-09-24 16:11:19,652 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 54 states. [2020-09-24 16:11:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:22,182 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-09-24 16:11:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-09-24 16:11:22,183 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-09-24 16:11:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:22,185 INFO L225 Difference]: With dead ends: 156 [2020-09-24 16:11:22,185 INFO L226 Difference]: Without dead ends: 150 [2020-09-24 16:11:22,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-09-24 16:11:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-24 16:11:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-09-24 16:11:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-24 16:11:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-09-24 16:11:22,197 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2020-09-24 16:11:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:22,198 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-09-24 16:11:22,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-24 16:11:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-09-24 16:11:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 16:11:22,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:22,200 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:22,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 16:11:22,200 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:22,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:22,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1667691463, now seen corresponding path program 26 times [2020-09-24 16:11:22,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:22,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876570426] [2020-09-24 16:11:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:22,572 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:22,572 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:22,572 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:22,572 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:22,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-24 16:11:22,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:22,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-09-24 16:11:22,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:22,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-09-24 16:11:22,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:22,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-24 16:11:22,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:24,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:24,204 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:24,204 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:24,205 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:24,205 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:24,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:24,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:24,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:24,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:24,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876570426] [2020-09-24 16:11:24,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:24,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-09-24 16:11:24,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770308940] [2020-09-24 16:11:24,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-24 16:11:24,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-24 16:11:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 16:11:24,230 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 56 states. [2020-09-24 16:11:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:27,117 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-09-24 16:11:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-09-24 16:11:27,118 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2020-09-24 16:11:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:27,120 INFO L225 Difference]: With dead ends: 161 [2020-09-24 16:11:27,120 INFO L226 Difference]: Without dead ends: 155 [2020-09-24 16:11:27,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-09-24 16:11:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-24 16:11:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-09-24 16:11:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-24 16:11:27,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-09-24 16:11:27,126 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2020-09-24 16:11:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:27,127 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-09-24 16:11:27,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-24 16:11:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-09-24 16:11:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 16:11:27,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:27,128 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:27,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-24 16:11:27,129 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:27,129 INFO L82 PathProgramCache]: Analyzing trace with hash -799766953, now seen corresponding path program 27 times [2020-09-24 16:11:27,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:27,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025281231] [2020-09-24 16:11:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:27,546 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:27,547 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:27,547 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:27,547 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:27,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-24 16:11:27,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-09-24 16:11:27,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-09-24 16:11:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-24 16:11:27,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0