/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 SequenceOfStatements --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:50:58,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:50:58,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:50:58,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:50:58,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:50:58,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:50:58,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:50:58,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:50:58,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:50:58,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:50:58,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:50:58,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:50:58,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:50:58,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:50:58,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:50:58,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:50:58,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:50:58,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:50:58,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:50:58,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:50:58,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:50:58,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:50:58,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:50:58,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:50:58,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:50:58,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:50:58,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:50:58,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:50:58,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:50:58,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:50:58,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:50:58,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:50:58,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:50:58,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:50:58,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:50:58,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:50:58,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:50:58,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:50:58,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:50:58,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:50:58,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:50:58,380 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 [2020-10-12 09:50:58,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:50:58,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:50:58,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:50:58,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:50:58,403 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:50:58,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:50:58,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:50:58,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:50:58,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:50:58,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:50:58,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:50:58,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:50:58,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:50:58,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:50:58,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:50:58,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:50:58,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:50:58,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:50:58,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:50:58,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:50:58,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:50:58,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:50:58,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:50:58,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:50:58,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:50:58,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:50:58,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:50:58,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:50:58,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:50:58,408 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 -> SequenceOfStatements 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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:50:58,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:50:58,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:50:58,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:50:58,739 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:50:58,740 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:50:58,741 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-12 09:50:58,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cc157937/1962a7e1e34a4bb4bcaee20a1e800e24/FLAG09121ca24 [2020-10-12 09:50:59,235 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:50:59,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-12 09:50:59,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cc157937/1962a7e1e34a4bb4bcaee20a1e800e24/FLAG09121ca24 [2020-10-12 09:50:59,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cc157937/1962a7e1e34a4bb4bcaee20a1e800e24 [2020-10-12 09:50:59,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:50:59,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:50:59,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:50:59,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:50:59,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:50:59,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:50:59,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e20dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59, skipping insertion in model container [2020-10-12 09:50:59,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:50:59,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:50:59,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:50:59,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:50:59,898 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:50:59,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:50:59,943 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:50:59,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59 WrapperNode [2020-10-12 09:50:59,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:50:59,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:50:59,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:50:59,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:00,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:51:00,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:51:00,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:51:00,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:51:00,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:51:00,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:51:00,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (1/1) ... [2020-10-12 09:51:00,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:00,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:00,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:00,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:00,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (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 [2020-10-12 09:51:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:00,403 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:00,403 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 09:51:00,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:00 BoogieIcfgContainer [2020-10-12 09:51:00,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:00,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:00,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:00,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:00,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:50:59" (1/3) ... [2020-10-12 09:51:00,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f2b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:00, skipping insertion in model container [2020-10-12 09:51:00,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:50:59" (2/3) ... [2020-10-12 09:51:00,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f2b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:00, skipping insertion in model container [2020-10-12 09:51:00,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:00" (3/3) ... [2020-10-12 09:51:00,415 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2020-10-12 09:51:00,426 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:00,433 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:00,446 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:00,469 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:00,469 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:00,469 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:00,470 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:00,470 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:00,470 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:00,470 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:00,470 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-12 09:51:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 09:51:00,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:00,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:00,497 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:00,503 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2020-10-12 09:51:00,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:00,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869205934] [2020-10-12 09:51:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:00,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:00,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:00,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:01,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:01,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 09:51:01,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:01,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-12 09:51:01,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:01,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:01,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:01,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:01,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:01,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:01,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:01,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:01,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:01,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:01,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:01,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:01,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:01,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:01,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869205934] [2020-10-12 09:51:01,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:01,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:01,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217103501] [2020-10-12 09:51:01,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:01,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:01,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:01,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:01,297 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-12 09:51:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:01,481 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2020-10-12 09:51:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:01,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-12 09:51:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:01,492 INFO L225 Difference]: With dead ends: 64 [2020-10-12 09:51:01,493 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 09:51:01,496 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 [2020-10-12 09:51:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 09:51:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-12 09:51:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 09:51:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-12 09:51:01,542 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-10-12 09:51:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:01,542 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-12 09:51:01,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-12 09:51:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 09:51:01,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:01,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:01,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:01,545 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:01,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1711436712, now seen corresponding path program 1 times [2020-10-12 09:51:01,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:01,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309365708] [2020-10-12 09:51:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:01,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:01,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:01,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:01,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:02,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:03,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:03,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 09:51:03,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1585 [2020-10-12 09:51:03,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:51:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 09:51:03,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:04,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:04,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:04,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:04,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:04,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:04,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:04,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:04,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:04,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:04,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:04,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:04,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309365708] [2020-10-12 09:51:04,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:04,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:51:04,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564760282] [2020-10-12 09:51:04,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:51:04,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:51:04,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:51:04,062 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 15 states. [2020-10-12 09:51:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:04,943 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-12 09:51:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:51:04,944 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-12 09:51:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:04,947 INFO L225 Difference]: With dead ends: 55 [2020-10-12 09:51:04,947 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 09:51:04,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:51:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 09:51:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2020-10-12 09:51:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:51:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-12 09:51:04,964 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2020-10-12 09:51:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:04,965 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-12 09:51:04,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:51:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-12 09:51:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:51:04,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:04,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:04,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:04,967 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash -251841402, now seen corresponding path program 2 times [2020-10-12 09:51:04,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:04,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338119257] [2020-10-12 09:51:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:04,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:05,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:06,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:07,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:07,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:51:07,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:07,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2174 [2020-10-12 09:51:07,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:07,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:51:07,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:07,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:51:07,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:07,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:07,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:07,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:07,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:07,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:07,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:07,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:07,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:07,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:07,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:07,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:07,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338119257] [2020-10-12 09:51:07,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:07,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:51:07,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362996497] [2020-10-12 09:51:07,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:51:07,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:07,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:51:07,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:51:07,953 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-10-12 09:51:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:08,900 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-12 09:51:08,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:51:08,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-12 09:51:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:08,905 INFO L225 Difference]: With dead ends: 68 [2020-10-12 09:51:08,906 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 09:51:08,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:51:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 09:51:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 44. [2020-10-12 09:51:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 09:51:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-12 09:51:08,931 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2020-10-12 09:51:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:08,932 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-12 09:51:08,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:51:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-12 09:51:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:51:08,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:08,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:08,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:08,935 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:08,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1004644414, now seen corresponding path program 3 times [2020-10-12 09:51:08,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:08,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309005026] [2020-10-12 09:51:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:08,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:10,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:11,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:11,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:51:11,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:11,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2457 [2020-10-12 09:51:11,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:11,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:51:11,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:11,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 09:51:11,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:12,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:12,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:12,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:12,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:12,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:12,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:12,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:12,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:12,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309005026] [2020-10-12 09:51:12,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:12,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:51:12,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059564598] [2020-10-12 09:51:12,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:51:12,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:51:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:51:12,185 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 17 states. [2020-10-12 09:51:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:13,248 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-10-12 09:51:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:51:13,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-12 09:51:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:13,251 INFO L225 Difference]: With dead ends: 76 [2020-10-12 09:51:13,253 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:51:13,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:51:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:51:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2020-10-12 09:51:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:51:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-12 09:51:13,285 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 31 [2020-10-12 09:51:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:13,286 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-12 09:51:13,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:51:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-12 09:51:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 09:51:13,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:13,290 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:13,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:13,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:13,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1300116769, now seen corresponding path program 1 times [2020-10-12 09:51:13,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:13,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146957049] [2020-10-12 09:51:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:13,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:13,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:14,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:14,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:51:14,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-10-12 09:51:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:14,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:14,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:14,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:14,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:14,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:14,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:14,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:51:14,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:14,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:14,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:14,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:14,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:51:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:14,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:14,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:14,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:14,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:14,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:14,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:14,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:14,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:14,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:14,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:51:14,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146957049] [2020-10-12 09:51:14,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:14,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:14,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668824715] [2020-10-12 09:51:14,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:14,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:14,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:14,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:14,133 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 5 states. [2020-10-12 09:51:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:14,265 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-10-12 09:51:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:14,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-12 09:51:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:14,281 INFO L225 Difference]: With dead ends: 90 [2020-10-12 09:51:14,282 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:51:14,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:51:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-12 09:51:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 09:51:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-12 09:51:14,309 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 33 [2020-10-12 09:51:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:14,309 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-12 09:51:14,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-12 09:51:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:51:14,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:14,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:14,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:14,316 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2018744903, now seen corresponding path program 2 times [2020-10-12 09:51:14,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:14,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343232264] [2020-10-12 09:51:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:14,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:14,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:14,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:14,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:16,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:18,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:18,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:51:18,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:18,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4608 [2020-10-12 09:51:18,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:18,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:51:18,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:51:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:19,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:19,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:19,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:19,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:19,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:19,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:19,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:19,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:19,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:19,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:51:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:19,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:19,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:19,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:19,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:19,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:19,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:19,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:19,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:19,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343232264] [2020-10-12 09:51:19,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:19,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:51:19,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082114575] [2020-10-12 09:51:19,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:51:19,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:51:19,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:51:19,821 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 19 states. [2020-10-12 09:51:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:21,011 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-12 09:51:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:51:21,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-10-12 09:51:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:21,013 INFO L225 Difference]: With dead ends: 81 [2020-10-12 09:51:21,013 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 09:51:21,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:51:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 09:51:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-10-12 09:51:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:51:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-12 09:51:21,038 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 39 [2020-10-12 09:51:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:21,039 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-12 09:51:21,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:51:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-12 09:51:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:51:21,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:21,043 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:21,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:21,043 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 215684346, now seen corresponding path program 4 times [2020-10-12 09:51:21,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:21,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56103503] [2020-10-12 09:51:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:21,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:26,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:26,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:51:26,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:26,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:51:26,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:26,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:51:26,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:26,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:51:26,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:26,554 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2020-10-12 09:51:27,149 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-12 09:51:27,326 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-12 09:51:27,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:27,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:27,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:27,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:27,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:27,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:27,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:51:27,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56103503] [2020-10-12 09:51:27,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:27,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:51:27,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293118520] [2020-10-12 09:51:27,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:51:27,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:27,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:51:27,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:51:27,771 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 20 states. [2020-10-12 09:51:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:29,631 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-10-12 09:51:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:51:29,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-12 09:51:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:29,633 INFO L225 Difference]: With dead ends: 94 [2020-10-12 09:51:29,633 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 09:51:29,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:51:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 09:51:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2020-10-12 09:51:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 09:51:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-12 09:51:29,648 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 39 [2020-10-12 09:51:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:29,649 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-12 09:51:29,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:51:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-12 09:51:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:51:29,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:29,650 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:29,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:29,651 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1090250217, now seen corresponding path program 3 times [2020-10-12 09:51:29,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:29,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854509253] [2020-10-12 09:51:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:29,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:51:34,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:34,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4353 [2020-10-12 09:51:34,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:51:34,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:34,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:51:34,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:34,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:34,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:34,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:34,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:34,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:34,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:51:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:34,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:34,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:34,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:34,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:34,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:34,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:34,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:34,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854509253] [2020-10-12 09:51:34,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:34,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:51:34,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159395405] [2020-10-12 09:51:34,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:51:34,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:34,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:51:34,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:51:34,883 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 20 states. [2020-10-12 09:51:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:36,185 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-12 09:51:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:51:36,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-12 09:51:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:36,187 INFO L225 Difference]: With dead ends: 101 [2020-10-12 09:51:36,187 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 09:51:36,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:51:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 09:51:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2020-10-12 09:51:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:51:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-12 09:51:36,220 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 41 [2020-10-12 09:51:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:36,220 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-12 09:51:36,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:51:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-12 09:51:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:51:36,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:36,222 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:36,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:51:36,224 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:36,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1144179032, now seen corresponding path program 5 times [2020-10-12 09:51:36,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:36,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424220695] [2020-10-12 09:51:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:40,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:40,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:51:40,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:40,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4667 [2020-10-12 09:51:40,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:40,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:51:40,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:40,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:51:40,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:42,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:42,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:42,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:42,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:42,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:42,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:42,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:42,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:42,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:42,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:42,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424220695] [2020-10-12 09:51:42,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:42,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:51:42,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348700194] [2020-10-12 09:51:42,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:51:42,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:51:42,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:51:42,646 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 22 states. [2020-10-12 09:51:44,198 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-12 09:51:44,476 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-12 09:51:44,769 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-12 09:51:44,977 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-12 09:51:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:45,819 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-10-12 09:51:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:51:45,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-10-12 09:51:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:45,822 INFO L225 Difference]: With dead ends: 102 [2020-10-12 09:51:45,822 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 09:51:45,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:51:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 09:51:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2020-10-12 09:51:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 09:51:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-12 09:51:45,836 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 41 [2020-10-12 09:51:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:45,837 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-12 09:51:45,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:51:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-12 09:51:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:51:45,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:45,838 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:45,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:51:45,838 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash 74374710, now seen corresponding path program 6 times [2020-10-12 09:51:45,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:45,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039842446] [2020-10-12 09:51:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:47,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:49,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:51:49,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:51:49,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4140 [2020-10-12 09:51:49,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:51:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:51:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:51:49,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:51,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:51,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:51,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:51,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:51,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:51,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:51,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:51,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:51,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:51,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:51:51,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039842446] [2020-10-12 09:51:51,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:51,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:51:51,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477866352] [2020-10-12 09:51:51,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:51:51,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:51:51,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:51:51,635 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 22 states. [2020-10-12 09:51:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:53,877 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2020-10-12 09:51:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:51:53,878 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-10-12 09:51:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:53,880 INFO L225 Difference]: With dead ends: 106 [2020-10-12 09:51:53,881 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:51:53,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=514, Invalid=1556, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:51:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:51:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2020-10-12 09:51:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:51:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-12 09:51:53,894 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 43 [2020-10-12 09:51:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:53,894 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-12 09:51:53,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:51:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-12 09:51:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:51:53,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:53,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:53,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:51:53,896 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:53,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1532683280, now seen corresponding path program 4 times [2020-10-12 09:51:53,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:53,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375756913] [2020-10-12 09:51:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:53,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:53,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:55,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:51:55,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:51:55,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1623 [2020-10-12 09:51:55,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:51:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:55,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:55,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:55,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:55,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:55,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:55,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:55,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:55,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:55,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:51:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:55,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:55,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:55,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:55,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:51:55,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:55,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:55,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:55,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 09:51:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:55,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:55,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:51:55,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:55,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:51:55,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:51:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:55,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 09:51:55,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375756913] [2020-10-12 09:51:55,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:55,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:55,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745714486] [2020-10-12 09:51:55,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:55,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:55,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:55,567 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 6 states. [2020-10-12 09:51:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:55,685 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-10-12 09:51:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:55,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-12 09:51:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:55,687 INFO L225 Difference]: With dead ends: 126 [2020-10-12 09:51:55,687 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 09:51:55,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 09:51:55,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-12 09:51:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 09:51:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-10-12 09:51:55,699 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 47 [2020-10-12 09:51:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:55,700 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-10-12 09:51:55,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-10-12 09:51:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:51:55,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:55,701 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:55,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:51:55,701 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash 622129296, now seen corresponding path program 7 times [2020-10-12 09:51:55,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:55,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191054344] [2020-10-12 09:51:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:55,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:59,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:00,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:00,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:52:00,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:00,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:52:00,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:52:00,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:52:00,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 09:52:00,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:52:01,202 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 32 [2020-10-12 09:52:01,340 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 32 [2020-10-12 09:52:01,639 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 46 [2020-10-12 09:52:01,804 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2020-10-12 09:52:03,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:03,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:03,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:03,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:03,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:03,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:03,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:03,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:03,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:52:03,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191054344] [2020-10-12 09:52:03,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:03,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:52:03,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513053284] [2020-10-12 09:52:03,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:52:03,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:03,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:52:03,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:52:03,447 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 25 states. [2020-10-12 09:52:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:05,368 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2020-10-12 09:52:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:52:05,369 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-10-12 09:52:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:05,371 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:52:05,371 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 09:52:05,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=435, Invalid=1205, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:52:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 09:52:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 75. [2020-10-12 09:52:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 09:52:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-12 09:52:05,388 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-10-12 09:52:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:05,388 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-12 09:52:05,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:52:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-12 09:52:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:52:05,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:05,396 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:05,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:05,397 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1338677203, now seen corresponding path program 5 times [2020-10-12 09:52:05,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:05,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005934126] [2020-10-12 09:52:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:05,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:05,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:10,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:10,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:52:10,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:10,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-12 09:52:10,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:10,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:52:10,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:52:10,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 09:52:10,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:11,099 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2020-10-12 09:52:11,300 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2020-10-12 09:52:12,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:12,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:12,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:12,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:12,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:12,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:12,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:12,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:12,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:12,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:12,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 09:52:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:12,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:12,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:12,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:12,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:52:12,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:12,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:52:12,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:12,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:52:12,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:52:12,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005934126] [2020-10-12 09:52:12,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:12,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:52:12,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764111722] [2020-10-12 09:52:12,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:52:12,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:12,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:52:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:52:12,355 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 25 states. [2020-10-12 09:52:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:14,011 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2020-10-12 09:52:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:52:14,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-12 09:52:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:14,014 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:52:14,014 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 09:52:14,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:52:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 09:52:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2020-10-12 09:52:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 09:52:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-10-12 09:52:14,031 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 51 [2020-10-12 09:52:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:14,032 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-10-12 09:52:14,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:52:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-10-12 09:52:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:52:14,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:14,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:14,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:52:14,033 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:14,034 INFO L82 PathProgramCache]: Analyzing trace with hash 82211146, now seen corresponding path program 6 times [2020-10-12 09:52:14,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:14,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759404952] [2020-10-12 09:52:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:14,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:17,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:19,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 09:52:19,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:52:19,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:52:19,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:19,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:52:19,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:52:19,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 09:52:19,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:20,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:20,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:20,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:52:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:20,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:20,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:20,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:52:20,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:52:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:52:20,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:52:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:20,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:20,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:52:20,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:52:20,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:20,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:52:20,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:52:20,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759404952] [2020-10-12 09:52:20,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:20,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:52:20,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751140949] [2020-10-12 09:52:20,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:52:20,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:20,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:52:20,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:52:20,367 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 24 states. [2020-10-12 09:52:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:21,963 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2020-10-12 09:52:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:52:21,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-12 09:52:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:21,971 INFO L225 Difference]: With dead ends: 121 [2020-10-12 09:52:21,971 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 09:52:21,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:52:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 09:52:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2020-10-12 09:52:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 09:52:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-10-12 09:52:21,992 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 53 [2020-10-12 09:52:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:21,993 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-10-12 09:52:21,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:52:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-10-12 09:52:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:52:21,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:21,994 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:21,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:52:21,994 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:21,995 INFO L82 PathProgramCache]: Analyzing trace with hash -380219509, now seen corresponding path program 7 times [2020-10-12 09:52:21,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:21,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632680460] [2020-10-12 09:52:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:22,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:22,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:27,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:52:27,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:27,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:52:27,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:27,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:52:27,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 09:52:27,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:52:27,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:27,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:27,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:27,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:27,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:27,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:27,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:27,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:27,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:27,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:27,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:52:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:27,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:27,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:52:27,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:27,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:27,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:27,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:27,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:52:27,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:27,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 09:52:27,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632680460] [2020-10-12 09:52:27,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:27,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:52:27,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224920103] [2020-10-12 09:52:27,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:52:27,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:27,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:52:27,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:52:27,099 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 11 states. [2020-10-12 09:52:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:27,363 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2020-10-12 09:52:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:52:27,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-12 09:52:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:27,365 INFO L225 Difference]: With dead ends: 171 [2020-10-12 09:52:27,366 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:52:27,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:52:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:52:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-12 09:52:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 09:52:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-12 09:52:27,395 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 53 [2020-10-12 09:52:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:27,396 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-12 09:52:27,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:52:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-12 09:52:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 09:52:27,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:27,397 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:27,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:27,397 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1503750072, now seen corresponding path program 8 times [2020-10-12 09:52:27,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:27,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128046945] [2020-10-12 09:52:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:28,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:32,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 09:52:32,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:52:32,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:52:32,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 09:52:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:32,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:32,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:32,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:32,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:32,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:32,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:32,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:32,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:52:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-12 09:52:32,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128046945] [2020-10-12 09:52:32,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:32,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:32,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797726561] [2020-10-12 09:52:32,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:32,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:32,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:32,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:32,595 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 15 states. [2020-10-12 09:52:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:32,956 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2020-10-12 09:52:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:32,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-12 09:52:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:32,959 INFO L225 Difference]: With dead ends: 160 [2020-10-12 09:52:32,959 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 09:52:32,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 09:52:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-12 09:52:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 09:52:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-12 09:52:33,008 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 73 [2020-10-12 09:52:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:33,009 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-12 09:52:33,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-12 09:52:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 09:52:33,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:33,019 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:33,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:33,020 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1870086010, now seen corresponding path program 9 times [2020-10-12 09:52:33,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:33,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306390902] [2020-10-12 09:52:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:33,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:33,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:33,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:38,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 09:52:38,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:52:38,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:52:38,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:38,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:38,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:38,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:38,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:38,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:38,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:52:38,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:38,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:38,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:38,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:38,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-12 09:52:38,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306390902] [2020-10-12 09:52:38,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:38,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:38,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293581712] [2020-10-12 09:52:38,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:38,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:38,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:38,241 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 16 states. [2020-10-12 09:52:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:38,566 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2020-10-12 09:52:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:38,567 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-10-12 09:52:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:38,568 INFO L225 Difference]: With dead ends: 169 [2020-10-12 09:52:38,568 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 09:52:38,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 09:52:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-12 09:52:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:52:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-12 09:52:38,591 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2020-10-12 09:52:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:38,591 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-12 09:52:38,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-12 09:52:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 09:52:38,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:38,593 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:38,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:38,593 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash 390100704, now seen corresponding path program 10 times [2020-10-12 09:52:38,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:38,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291482114] [2020-10-12 09:52:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:38,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:43,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 09:52:43,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:52:43,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:52:43,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-12 09:52:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:43,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:43,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:43,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:43,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:43,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:43,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:43,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-12 09:52:43,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291482114] [2020-10-12 09:52:43,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:43,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:43,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692716427] [2020-10-12 09:52:43,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:43,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:43,791 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 17 states. [2020-10-12 09:52:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:44,146 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-10-12 09:52:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:44,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-10-12 09:52:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:44,147 INFO L225 Difference]: With dead ends: 179 [2020-10-12 09:52:44,147 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 09:52:44,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 09:52:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-10-12 09:52:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 09:52:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-12 09:52:44,172 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 97 [2020-10-12 09:52:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:44,172 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-12 09:52:44,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-12 09:52:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 09:52:44,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:44,174 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:44,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:52:44,174 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1977335366, now seen corresponding path program 11 times [2020-10-12 09:52:44,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:44,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377617967] [2020-10-12 09:52:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:44,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:49,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 09:52:49,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:52:49,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 09:52:49,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:49,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:49,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:52:49,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:49,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:49,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:49,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:49,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:49,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:49,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:52:49,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:49,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:49,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:49,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:52:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-12 09:52:49,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377617967] [2020-10-12 09:52:49,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:49,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:49,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156142536] [2020-10-12 09:52:49,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:49,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:49,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:49,496 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 18 states. [2020-10-12 09:52:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:49,967 INFO L93 Difference]: Finished difference Result 189 states and 198 transitions. [2020-10-12 09:52:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:49,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2020-10-12 09:52:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:49,969 INFO L225 Difference]: With dead ends: 189 [2020-10-12 09:52:49,969 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:52:49,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:52:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2020-10-12 09:52:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:52:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-12 09:52:50,009 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2020-10-12 09:52:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:50,009 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-12 09:52:50,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-12 09:52:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-12 09:52:50,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:50,011 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:50,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:52:50,011 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2081079572, now seen corresponding path program 12 times [2020-10-12 09:52:50,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:50,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651503795] [2020-10-12 09:52:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:50,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:55,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 09:52:55,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:52:55,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:52:55,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:55,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:55,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:55,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:55,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:55,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:55,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:55,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:55,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:55,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:55,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:55,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-12 09:52:55,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651503795] [2020-10-12 09:52:55,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:55,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:55,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729882196] [2020-10-12 09:52:55,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:55,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:55,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:55,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:55,257 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 19 states. [2020-10-12 09:52:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:55,646 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2020-10-12 09:52:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:55,647 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2020-10-12 09:52:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:55,649 INFO L225 Difference]: With dead ends: 199 [2020-10-12 09:52:55,649 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 09:52:55,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 09:52:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2020-10-12 09:52:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 09:52:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2020-10-12 09:52:55,671 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 109 [2020-10-12 09:52:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:55,671 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2020-10-12 09:52:55,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2020-10-12 09:52:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 09:52:55,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:55,672 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:55,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:52:55,672 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:55,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2108517138, now seen corresponding path program 13 times [2020-10-12 09:52:55,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:55,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214385985] [2020-10-12 09:52:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:55,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:00,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-12 09:53:00,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:00,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:53:00,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:53:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:53:00,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:00,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:00,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:00,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:00,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:00,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:00,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:00,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:00,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:00,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:00,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-12 09:53:00,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214385985] [2020-10-12 09:53:00,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:00,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:53:00,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143549369] [2020-10-12 09:53:00,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:53:00,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:53:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:53:00,949 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 20 states. [2020-10-12 09:53:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:01,353 INFO L93 Difference]: Finished difference Result 209 states and 218 transitions. [2020-10-12 09:53:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:53:01,355 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 115 [2020-10-12 09:53:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:01,356 INFO L225 Difference]: With dead ends: 209 [2020-10-12 09:53:01,357 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 09:53:01,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:53:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 09:53:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-12 09:53:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 09:53:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-10-12 09:53:01,380 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 115 [2020-10-12 09:53:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:01,380 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-10-12 09:53:01,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:53:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-10-12 09:53:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-12 09:53:01,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:01,382 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:01,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:53:01,382 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:01,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1360896696, now seen corresponding path program 14 times [2020-10-12 09:53:01,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:01,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009535698] [2020-10-12 09:53:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:01,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:06,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-12 09:53:06,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:06,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 09:53:06,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:53:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:53:06,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:06,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:06,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:06,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:06,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:06,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-12 09:53:06,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009535698] [2020-10-12 09:53:06,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:06,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:53:06,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24563296] [2020-10-12 09:53:06,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:53:06,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:53:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:53:06,701 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 21 states. [2020-10-12 09:53:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:07,061 INFO L93 Difference]: Finished difference Result 219 states and 228 transitions. [2020-10-12 09:53:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:53:07,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 121 [2020-10-12 09:53:07,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:07,066 INFO L225 Difference]: With dead ends: 219 [2020-10-12 09:53:07,066 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 09:53:07,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:53:07,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 09:53:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-10-12 09:53:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 09:53:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2020-10-12 09:53:07,088 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 121 [2020-10-12 09:53:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:07,088 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2020-10-12 09:53:07,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:53:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2020-10-12 09:53:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-12 09:53:07,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:07,089 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:07,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:53:07,089 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:07,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1977042398, now seen corresponding path program 15 times [2020-10-12 09:53:07,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:07,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229405324] [2020-10-12 09:53:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:07,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:12,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:12,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-12 09:53:12,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:12,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-12 09:53:12,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:12,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:53:12,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:12,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:53:12,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:12,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:12,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:12,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:12,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:12,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:12,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:12,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:12,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:12,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:12,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:12,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-12 09:53:12,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229405324] [2020-10-12 09:53:12,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:12,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:53:12,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575668567] [2020-10-12 09:53:12,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:53:12,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:53:12,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:12,570 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand 22 states. [2020-10-12 09:53:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:13,073 INFO L93 Difference]: Finished difference Result 229 states and 238 transitions. [2020-10-12 09:53:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:53:13,074 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 127 [2020-10-12 09:53:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:13,075 INFO L225 Difference]: With dead ends: 229 [2020-10-12 09:53:13,076 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 09:53:13,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 09:53:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2020-10-12 09:53:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 09:53:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2020-10-12 09:53:13,109 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 127 [2020-10-12 09:53:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:13,109 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2020-10-12 09:53:13,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:53:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2020-10-12 09:53:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-12 09:53:13,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:13,111 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:13,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:53:13,111 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1927525508, now seen corresponding path program 16 times [2020-10-12 09:53:13,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:13,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274213679] [2020-10-12 09:53:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:13,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:18,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:18,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-12 09:53:18,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:18,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-12 09:53:18,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:18,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:53:18,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:18,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:53:18,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:18,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:18,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:18,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:18,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:18,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:18,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:18,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:18,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-12 09:53:18,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274213679] [2020-10-12 09:53:18,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:18,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:53:18,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270715414] [2020-10-12 09:53:18,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:53:18,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:18,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:53:18,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:18,510 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 23 states. [2020-10-12 09:53:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:18,927 INFO L93 Difference]: Finished difference Result 239 states and 248 transitions. [2020-10-12 09:53:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:53:18,928 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 133 [2020-10-12 09:53:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:18,930 INFO L225 Difference]: With dead ends: 239 [2020-10-12 09:53:18,930 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 09:53:18,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 09:53:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2020-10-12 09:53:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 09:53:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2020-10-12 09:53:18,978 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2020-10-12 09:53:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:18,978 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2020-10-12 09:53:18,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:53:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2020-10-12 09:53:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-12 09:53:18,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:18,980 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:18,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:53:18,983 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash 456896854, now seen corresponding path program 17 times [2020-10-12 09:53:18,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:18,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261252960] [2020-10-12 09:53:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:19,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:24,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-12 09:53:24,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:24,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 09:53:24,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:24,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:24,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:24,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:24,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:24,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:53:24,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-12 09:53:24,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261252960] [2020-10-12 09:53:24,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:24,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:24,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523682103] [2020-10-12 09:53:24,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:24,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:24,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:24,386 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand 24 states. [2020-10-12 09:53:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:24,921 INFO L93 Difference]: Finished difference Result 249 states and 258 transitions. [2020-10-12 09:53:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:24,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-10-12 09:53:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:24,923 INFO L225 Difference]: With dead ends: 249 [2020-10-12 09:53:24,923 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 09:53:24,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 09:53:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-10-12 09:53:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 09:53:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2020-10-12 09:53:24,958 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 139 [2020-10-12 09:53:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:24,958 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2020-10-12 09:53:24,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2020-10-12 09:53:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-12 09:53:24,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:24,960 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:24,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:53:24,961 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash -57832528, now seen corresponding path program 18 times [2020-10-12 09:53:24,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:24,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371883471] [2020-10-12 09:53:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:24,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:29,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-12 09:53:29,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:29,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:53:29,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:29,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:30,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:30,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:30,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:30,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:30,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:30,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:30,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-12 09:53:30,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371883471] [2020-10-12 09:53:30,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:30,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:53:30,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469391316] [2020-10-12 09:53:30,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:53:30,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:30,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:53:30,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:30,370 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand 25 states. [2020-10-12 09:53:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:30,768 INFO L93 Difference]: Finished difference Result 259 states and 268 transitions. [2020-10-12 09:53:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:53:30,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 145 [2020-10-12 09:53:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:30,771 INFO L225 Difference]: With dead ends: 259 [2020-10-12 09:53:30,771 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 09:53:30,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 09:53:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-12 09:53:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 09:53:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2020-10-12 09:53:30,796 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2020-10-12 09:53:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:30,796 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2020-10-12 09:53:30,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:53:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2020-10-12 09:53:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-12 09:53:30,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:30,798 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:30,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:53:30,798 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1470134922, now seen corresponding path program 19 times [2020-10-12 09:53:30,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:30,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836231688] [2020-10-12 09:53:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:30,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:35,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-12 09:53:35,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:35,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-12 09:53:35,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:35,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:35,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 09:53:35,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:35,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:36,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:36,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:36,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:36,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:36,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:36,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:36,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:36,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-12 09:53:36,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836231688] [2020-10-12 09:53:36,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:36,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:36,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691743318] [2020-10-12 09:53:36,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:36,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:36,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:36,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:36,320 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 26 states. [2020-10-12 09:53:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:36,781 INFO L93 Difference]: Finished difference Result 269 states and 278 transitions. [2020-10-12 09:53:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:36,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 151 [2020-10-12 09:53:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:36,784 INFO L225 Difference]: With dead ends: 269 [2020-10-12 09:53:36,784 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 09:53:36,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 09:53:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-12 09:53:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 09:53:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2020-10-12 09:53:36,814 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 151 [2020-10-12 09:53:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:36,815 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2020-10-12 09:53:36,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2020-10-12 09:53:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-12 09:53:36,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:36,816 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:36,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:53:36,816 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash 730537444, now seen corresponding path program 20 times [2020-10-12 09:53:36,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:36,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503418182] [2020-10-12 09:53:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:36,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:36,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:36,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:41,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-12 09:53:41,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:41,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-12 09:53:41,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:41,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:41,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:53:41,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:41,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:42,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:42,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:42,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:42,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:42,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:42,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-12 09:53:42,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503418182] [2020-10-12 09:53:42,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:42,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:42,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281057231] [2020-10-12 09:53:42,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:42,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:42,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:42,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:42,441 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand 27 states. [2020-10-12 09:53:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:42,988 INFO L93 Difference]: Finished difference Result 279 states and 288 transitions. [2020-10-12 09:53:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:42,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 157 [2020-10-12 09:53:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:42,991 INFO L225 Difference]: With dead ends: 279 [2020-10-12 09:53:42,991 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 09:53:42,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 09:53:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2020-10-12 09:53:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 09:53:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2020-10-12 09:53:43,053 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 157 [2020-10-12 09:53:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:43,054 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2020-10-12 09:53:43,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2020-10-12 09:53:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-12 09:53:43,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:43,055 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:43,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:53:43,056 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:43,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1240208830, now seen corresponding path program 21 times [2020-10-12 09:53:43,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:43,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87211792] [2020-10-12 09:53:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:43,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:43,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:43,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:48,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-12 09:53:48,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:48,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 09:53:48,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:48,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:48,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:48,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:48,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:48,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:48,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:48,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:48,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:48,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:48,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:48,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:48,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-12 09:53:48,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87211792] [2020-10-12 09:53:48,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:48,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:48,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21037946] [2020-10-12 09:53:48,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:48,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:48,613 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 28 states. [2020-10-12 09:53:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:49,201 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2020-10-12 09:53:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:49,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 163 [2020-10-12 09:53:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:49,203 INFO L225 Difference]: With dead ends: 289 [2020-10-12 09:53:49,203 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 09:53:49,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 09:53:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2020-10-12 09:53:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 09:53:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2020-10-12 09:53:49,246 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 163 [2020-10-12 09:53:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:49,246 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2020-10-12 09:53:49,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2020-10-12 09:53:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-12 09:53:49,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:49,247 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:49,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:53:49,248 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash -789970408, now seen corresponding path program 22 times [2020-10-12 09:53:49,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:49,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340208262] [2020-10-12 09:53:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:49,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:49,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:49,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:54,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-12 09:53:54,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:53:54,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 09:53:54,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:54,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:53:54,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 09:53:54,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:53:54,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:54,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:54,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:54,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:54,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:54,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:54,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:54,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:54,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:54,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:54,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-12 09:53:54,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340208262] [2020-10-12 09:53:54,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:54,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:53:54,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242502716] [2020-10-12 09:53:54,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:53:54,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:54,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:53:54,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:54,820 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand 29 states. [2020-10-12 09:53:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:55,409 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2020-10-12 09:53:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:53:55,410 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 169 [2020-10-12 09:53:55,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:55,411 INFO L225 Difference]: With dead ends: 299 [2020-10-12 09:53:55,411 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 09:53:55,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 09:53:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2020-10-12 09:53:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 09:53:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2020-10-12 09:53:55,446 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 169 [2020-10-12 09:53:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:55,446 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2020-10-12 09:53:55,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:53:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2020-10-12 09:53:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-12 09:53:55,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:55,447 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:55,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:53:55,448 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash 624132850, now seen corresponding path program 23 times [2020-10-12 09:53:55,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:55,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431425216] [2020-10-12 09:53:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:55,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:55,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:00,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-12 09:54:00,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:00,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-12 09:54:00,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:00,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:54:00,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:54:00,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:54:00,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:01,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:01,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:01,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:01,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:01,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:01,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:01,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:01,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:01,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-12 09:54:01,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431425216] [2020-10-12 09:54:01,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:01,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:54:01,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53261260] [2020-10-12 09:54:01,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:54:01,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:54:01,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:54:01,139 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand 30 states. [2020-10-12 09:54:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:01,770 INFO L93 Difference]: Finished difference Result 309 states and 318 transitions. [2020-10-12 09:54:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:54:01,771 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 175 [2020-10-12 09:54:01,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:01,773 INFO L225 Difference]: With dead ends: 309 [2020-10-12 09:54:01,773 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 09:54:01,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:54:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 09:54:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-12 09:54:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 09:54:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2020-10-12 09:54:01,819 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 175 [2020-10-12 09:54:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:01,819 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2020-10-12 09:54:01,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:54:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2020-10-12 09:54:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-12 09:54:01,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:01,821 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:01,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:54:01,823 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:01,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1811888204, now seen corresponding path program 24 times [2020-10-12 09:54:01,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:01,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745239900] [2020-10-12 09:54:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:01,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:07,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-12 09:54:07,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5218 [2020-10-12 09:54:07,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:54:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 09:54:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:54:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:07,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:07,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:07,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:07,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:07,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:07,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:07,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:07,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:07,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-12 09:54:07,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745239900] [2020-10-12 09:54:07,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:07,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:54:07,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677025404] [2020-10-12 09:54:07,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:54:07,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:07,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:54:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:07,640 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand 31 states. [2020-10-12 09:54:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:08,225 INFO L93 Difference]: Finished difference Result 319 states and 328 transitions. [2020-10-12 09:54:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:54:08,226 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 181 [2020-10-12 09:54:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:08,227 INFO L225 Difference]: With dead ends: 319 [2020-10-12 09:54:08,228 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 09:54:08,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 09:54:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2020-10-12 09:54:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 09:54:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2020-10-12 09:54:08,269 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 181 [2020-10-12 09:54:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:08,270 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2020-10-12 09:54:08,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:54:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2020-10-12 09:54:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-12 09:54:08,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:08,271 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:08,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:54:08,271 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2062826970, now seen corresponding path program 25 times [2020-10-12 09:54:08,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:08,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132716922] [2020-10-12 09:54:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:08,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:13,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-12 09:54:13,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:13,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5214 [2020-10-12 09:54:13,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:13,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:54:13,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 09:54:13,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:54:13,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:14,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:14,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:14,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:14,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-12 09:54:14,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132716922] [2020-10-12 09:54:14,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:14,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:54:14,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433846959] [2020-10-12 09:54:14,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:54:14,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:14,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:54:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:14,142 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand 32 states. [2020-10-12 09:54:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:14,759 INFO L93 Difference]: Finished difference Result 329 states and 338 transitions. [2020-10-12 09:54:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:54:14,760 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 187 [2020-10-12 09:54:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:14,762 INFO L225 Difference]: With dead ends: 329 [2020-10-12 09:54:14,762 INFO L226 Difference]: Without dead ends: 202 [2020-10-12 09:54:14,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-12 09:54:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-10-12 09:54:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-12 09:54:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2020-10-12 09:54:14,806 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 187 [2020-10-12 09:54:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:14,806 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2020-10-12 09:54:14,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:54:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2020-10-12 09:54:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-12 09:54:14,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:14,808 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:14,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:54:14,808 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:14,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2069905280, now seen corresponding path program 26 times [2020-10-12 09:54:14,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:14,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615771643] [2020-10-12 09:54:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:19,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:19,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-12 09:54:19,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:19,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-12 09:54:19,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:19,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:19,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:19,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:19,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:20,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:20,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:20,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:20,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:20,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:20,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:20,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:20,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:20,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:20,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:20,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-10-12 09:54:20,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615771643] [2020-10-12 09:54:20,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:20,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:54:20,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133109240] [2020-10-12 09:54:20,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:54:20,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:54:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:20,588 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 33 states. [2020-10-12 09:54:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:21,257 INFO L93 Difference]: Finished difference Result 339 states and 348 transitions. [2020-10-12 09:54:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:54:21,258 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 193 [2020-10-12 09:54:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:21,260 INFO L225 Difference]: With dead ends: 339 [2020-10-12 09:54:21,260 INFO L226 Difference]: Without dead ends: 208 [2020-10-12 09:54:21,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-12 09:54:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2020-10-12 09:54:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-12 09:54:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 209 transitions. [2020-10-12 09:54:21,305 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 209 transitions. Word has length 193 [2020-10-12 09:54:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:21,305 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 209 transitions. [2020-10-12 09:54:21,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:54:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 209 transitions. [2020-10-12 09:54:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-12 09:54:21,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:21,306 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:21,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:54:21,307 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1383476390, now seen corresponding path program 27 times [2020-10-12 09:54:21,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:21,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415957430] [2020-10-12 09:54:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:26,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:26,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-12 09:54:26,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:26,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-12 09:54:26,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:54:26,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:26,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:54:26,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:27,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:27,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:27,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:27,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:27,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:27,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:27,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:27,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-12 09:54:27,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415957430] [2020-10-12 09:54:27,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:27,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:54:27,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537414790] [2020-10-12 09:54:27,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:54:27,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:27,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:54:27,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:27,236 INFO L87 Difference]: Start difference. First operand 205 states and 209 transitions. Second operand 34 states. [2020-10-12 09:54:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:27,939 INFO L93 Difference]: Finished difference Result 349 states and 358 transitions. [2020-10-12 09:54:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:54:27,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 199 [2020-10-12 09:54:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:27,942 INFO L225 Difference]: With dead ends: 349 [2020-10-12 09:54:27,942 INFO L226 Difference]: Without dead ends: 214 [2020-10-12 09:54:27,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-12 09:54:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2020-10-12 09:54:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-12 09:54:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2020-10-12 09:54:27,978 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 199 [2020-10-12 09:54:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:27,979 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2020-10-12 09:54:27,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:54:27,979 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2020-10-12 09:54:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-12 09:54:27,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:27,980 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:27,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:54:27,980 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -350184780, now seen corresponding path program 28 times [2020-10-12 09:54:27,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:27,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149554905] [2020-10-12 09:54:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:27,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:33,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:33,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-12 09:54:33,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:33,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-12 09:54:33,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 09:54:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:33,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:33,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:33,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:33,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:33,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:33,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:33,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:33,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:33,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:33,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:33,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:33,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-10-12 09:54:33,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149554905] [2020-10-12 09:54:33,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:33,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:33,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772210075] [2020-10-12 09:54:33,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:33,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:33,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:33,902 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand 35 states. [2020-10-12 09:54:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:34,644 INFO L93 Difference]: Finished difference Result 359 states and 368 transitions. [2020-10-12 09:54:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:34,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 205 [2020-10-12 09:54:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:34,646 INFO L225 Difference]: With dead ends: 359 [2020-10-12 09:54:34,646 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 09:54:34,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 09:54:34,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-10-12 09:54:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-12 09:54:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2020-10-12 09:54:34,686 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 205 [2020-10-12 09:54:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:34,686 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2020-10-12 09:54:34,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2020-10-12 09:54:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-12 09:54:34,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:34,687 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:34,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:54:34,688 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:34,688 INFO L82 PathProgramCache]: Analyzing trace with hash -884820338, now seen corresponding path program 29 times [2020-10-12 09:54:34,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:34,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385517695] [2020-10-12 09:54:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:34,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:34,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:39,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:39,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-12 09:54:39,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:54:39,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:54:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-12 09:54:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:54:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:40,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:40,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:40,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:40,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:40,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:40,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:40,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-12 09:54:40,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385517695] [2020-10-12 09:54:40,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:40,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:54:40,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471915437] [2020-10-12 09:54:40,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:54:40,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:40,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:54:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:40,539 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand 36 states. [2020-10-12 09:54:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:41,319 INFO L93 Difference]: Finished difference Result 369 states and 378 transitions. [2020-10-12 09:54:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:54:41,320 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 211 [2020-10-12 09:54:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:41,322 INFO L225 Difference]: With dead ends: 369 [2020-10-12 09:54:41,322 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 09:54:41,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 09:54:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-10-12 09:54:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-12 09:54:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 227 transitions. [2020-10-12 09:54:41,371 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 227 transitions. Word has length 211 [2020-10-12 09:54:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:41,372 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 227 transitions. [2020-10-12 09:54:41,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:54:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 227 transitions. [2020-10-12 09:54:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-12 09:54:41,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:41,374 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:41,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:54:41,374 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash -128530712, now seen corresponding path program 30 times [2020-10-12 09:54:41,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:41,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663740662] [2020-10-12 09:54:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:41,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:47,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:47,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-12 09:54:47,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:47,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5765 [2020-10-12 09:54:47,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:47,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:54:47,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:54:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:48,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:48,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:48,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:48,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:48,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:48,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:48,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-10-12 09:54:48,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663740662] [2020-10-12 09:54:48,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:48,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:54:48,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753960150] [2020-10-12 09:54:48,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:54:48,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:48,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:54:48,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:48,034 INFO L87 Difference]: Start difference. First operand 223 states and 227 transitions. Second operand 37 states. [2020-10-12 09:54:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:48,790 INFO L93 Difference]: Finished difference Result 379 states and 388 transitions. [2020-10-12 09:54:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:54:48,790 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 217 [2020-10-12 09:54:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:48,793 INFO L225 Difference]: With dead ends: 379 [2020-10-12 09:54:48,793 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 09:54:48,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:54:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 09:54:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2020-10-12 09:54:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-12 09:54:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 233 transitions. [2020-10-12 09:54:48,842 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 233 transitions. Word has length 217 [2020-10-12 09:54:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:48,842 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 233 transitions. [2020-10-12 09:54:48,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:54:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 233 transitions. [2020-10-12 09:54:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-12 09:54:48,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:48,844 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:48,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:54:48,844 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash 860580802, now seen corresponding path program 31 times [2020-10-12 09:54:48,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:48,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212468720] [2020-10-12 09:54:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:48,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:53,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:53,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-12 09:54:53,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:54:53,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-12 09:54:53,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:53,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:54:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:54:53,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:54,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:54,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:54,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:54,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:54,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:54:54,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:54,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-12 09:54:54,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212468720] [2020-10-12 09:54:54,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:54,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:54:54,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431961892] [2020-10-12 09:54:54,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:54:54,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:54:54,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:54,848 INFO L87 Difference]: Start difference. First operand 229 states and 233 transitions. Second operand 38 states. [2020-10-12 09:54:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:55,643 INFO L93 Difference]: Finished difference Result 389 states and 398 transitions. [2020-10-12 09:54:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:54:55,644 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 223 [2020-10-12 09:54:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:55,646 INFO L225 Difference]: With dead ends: 389 [2020-10-12 09:54:55,646 INFO L226 Difference]: Without dead ends: 238 [2020-10-12 09:54:55,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:54:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-12 09:54:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2020-10-12 09:54:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-12 09:54:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 239 transitions. [2020-10-12 09:54:55,688 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 239 transitions. Word has length 223 [2020-10-12 09:54:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:55,688 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 239 transitions. [2020-10-12 09:54:55,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:54:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 239 transitions. [2020-10-12 09:54:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-12 09:54:55,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:55,689 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:55,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:54:55,689 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash -845724388, now seen corresponding path program 32 times [2020-10-12 09:54:55,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:55,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022340326] [2020-10-12 09:54:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:55,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking...