/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/loops-crafted-1/in-de61.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:12:36,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:12:36,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:12:36,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:12:36,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:12:36,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:12:36,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:12:36,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:12:36,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:12:36,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:12:36,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:12:36,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:12:36,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:12:36,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:12:36,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:12:36,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:12:36,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:12:36,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:12:36,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:12:36,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:12:36,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:12:36,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:12:36,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:12:36,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:12:36,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:12:36,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:12:36,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:12:36,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:12:36,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:12:36,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:12:36,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:12:36,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:12:36,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:12:36,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:12:36,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:12:36,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:12:36,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:12:36,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:12:36,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:12:36,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:12:36,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:12:36,462 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 16:12:36,485 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:12:36,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:12:36,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:12:36,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:12:36,487 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:12:36,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:12:36,487 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:12:36,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:12:36,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:12:36,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:12:36,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:12:36,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:12:36,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:12:36,488 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:12:36,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:12:36,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:12:36,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:12:36,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:12:36,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:12:36,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:12:36,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:12:36,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:12:36,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:12:36,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:12:36,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:12:36,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:12:36,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:12:36,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:12:36,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:12:36,491 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 16:12:36,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:12:36,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:12:36,805 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:12:36,807 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:12:36,809 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:12:36,809 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-12 16:12:36,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79dada4e1/b4402794fab94fc0847f3c6bdb90d0b3/FLAG0a72b9858 [2020-10-12 16:12:37,338 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:12:37,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-12 16:12:37,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79dada4e1/b4402794fab94fc0847f3c6bdb90d0b3/FLAG0a72b9858 [2020-10-12 16:12:37,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79dada4e1/b4402794fab94fc0847f3c6bdb90d0b3 [2020-10-12 16:12:37,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:12:37,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:12:37,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:12:37,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:12:37,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:12:37,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:37,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c77fbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37, skipping insertion in model container [2020-10-12 16:12:37,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:37,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:12:37,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:12:37,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:12:37,943 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:12:37,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:12:37,986 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:12:37,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37 WrapperNode [2020-10-12 16:12:37,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:12:37,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:12:37,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:12:37,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:12:38,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:38,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:38,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:38,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:38,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:38,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:38,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (1/1) ... [2020-10-12 16:12:38,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:12:38,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:12:38,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:12:38,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:12:38,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (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 16:12:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:12:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:12:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:12:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:12:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:12:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:12:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:12:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:12:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:12:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:12:38,471 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:12:38,471 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 16:12:38,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:12:38 BoogieIcfgContainer [2020-10-12 16:12:38,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:12:38,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:12:38,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:12:38,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:12:38,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:12:37" (1/3) ... [2020-10-12 16:12:38,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ab334a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:12:38, skipping insertion in model container [2020-10-12 16:12:38,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:12:37" (2/3) ... [2020-10-12 16:12:38,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ab334a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:12:38, skipping insertion in model container [2020-10-12 16:12:38,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:12:38" (3/3) ... [2020-10-12 16:12:38,495 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de61.c [2020-10-12 16:12:38,513 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:12:38,520 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:12:38,533 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:12:38,553 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:12:38,553 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:12:38,554 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:12:38,554 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:12:38,554 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:12:38,554 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:12:38,554 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:12:38,554 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:12:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-12 16:12:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:12:38,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:38,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:38,576 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash -858988731, now seen corresponding path program 1 times [2020-10-12 16:12:38,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:38,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261899366] [2020-10-12 16:12:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:38,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:38,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:38,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:38,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:39,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:39,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:12:39,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:39,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 582 [2020-10-12 16:12:39,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:12:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:12:39,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 16:12:39,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:39,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:39,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:39,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:39,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:39,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:12:39,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:39,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:39,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261899366] [2020-10-12 16:12:39,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:12:39,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:12:39,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542407394] [2020-10-12 16:12:39,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:12:39,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:39,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:12:39,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:12:39,483 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-10-12 16:12:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:48,105 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2020-10-12 16:12:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:12:48,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-12 16:12:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:48,119 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:12:48,119 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:12:48,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:12:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-12 16:12:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 16:12:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2020-10-12 16:12:48,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2020-10-12 16:12:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:48,165 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2020-10-12 16:12:48,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:12:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2020-10-12 16:12:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:12:48,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:48,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:48,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:12:48,167 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:48,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:48,168 INFO L82 PathProgramCache]: Analyzing trace with hash 795384167, now seen corresponding path program 1 times [2020-10-12 16:12:48,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:48,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422539735] [2020-10-12 16:12:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:48,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:48,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:12:48,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:48,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-12 16:12:48,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:48,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:12:48,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:12:48,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:12:48,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:12:48,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:48,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:48,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:48,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:48,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:12:48,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:48,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:48,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422539735] [2020-10-12 16:12:48,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:12:48,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:12:48,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197811072] [2020-10-12 16:12:48,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:12:48,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:12:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:12:48,367 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand 4 states. [2020-10-12 16:12:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:48,471 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2020-10-12 16:12:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:12:48,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-12 16:12:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:48,473 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:12:48,473 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:12:48,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:12:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:12:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-12 16:12:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:12:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-12 16:12:48,483 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 17 [2020-10-12 16:12:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:48,484 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-12 16:12:48,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:12:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-12 16:12:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:12:48,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:48,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:48,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:12:48,486 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2096754730, now seen corresponding path program 1 times [2020-10-12 16:12:48,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:48,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672253766] [2020-10-12 16:12:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:48,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:48,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:12:48,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:12:48,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-12 16:12:48,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:48,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:12:48,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:48,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:12:48,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:48,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:48,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:48,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:48,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:48,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:48,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:48,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:48,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:12:48,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672253766] [2020-10-12 16:12:48,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:12:48,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:12:48,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871389361] [2020-10-12 16:12:48,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:12:48,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:48,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:12:48,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:12:48,848 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 7 states. [2020-10-12 16:12:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:49,047 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2020-10-12 16:12:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:12:49,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-12 16:12:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:49,049 INFO L225 Difference]: With dead ends: 52 [2020-10-12 16:12:49,049 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:12:49,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:12:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-12 16:12:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:12:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-10-12 16:12:49,059 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 17 [2020-10-12 16:12:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:49,060 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-10-12 16:12:49,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:12:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-10-12 16:12:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:12:49,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:49,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:49,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:12:49,062 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:49,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1416952401, now seen corresponding path program 1 times [2020-10-12 16:12:49,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:49,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943891356] [2020-10-12 16:12:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:49,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:12:49,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:12:49,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-12 16:12:49,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:12:49,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:49,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:12:49,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:49,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:49,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:12:49,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:49,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:12:49,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943891356] [2020-10-12 16:12:49,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:49,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:12:49,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886606519] [2020-10-12 16:12:49,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:12:49,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:49,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:12:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:12:49,282 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 5 states. [2020-10-12 16:12:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:49,416 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-10-12 16:12:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:12:49,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-12 16:12:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:49,417 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:12:49,418 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 16:12:49,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:12:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 16:12:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-10-12 16:12:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:12:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-10-12 16:12:49,438 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 18 [2020-10-12 16:12:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:49,439 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-10-12 16:12:49,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:12:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-10-12 16:12:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:12:49,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:49,440 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 16:12:49,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:12:49,442 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1029509497, now seen corresponding path program 1 times [2020-10-12 16:12:49,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:49,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031786397] [2020-10-12 16:12:49,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:12:49,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:49,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-12 16:12:49,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:12:49,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:12:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:12:49,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:49,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:49,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:49,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:12:49,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:49,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:49,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:49,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,687 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 16:12:49,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031786397] [2020-10-12 16:12:49,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:49,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:12:49,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256114011] [2020-10-12 16:12:49,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:12:49,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:49,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:12:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:12:49,692 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 5 states. [2020-10-12 16:12:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:49,855 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2020-10-12 16:12:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:12:49,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-12 16:12:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:49,857 INFO L225 Difference]: With dead ends: 61 [2020-10-12 16:12:49,857 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:12:49,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:12:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:12:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-12 16:12:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:12:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2020-10-12 16:12:49,871 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 19 [2020-10-12 16:12:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:49,871 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2020-10-12 16:12:49,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:12:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2020-10-12 16:12:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:12:49,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:49,873 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 16:12:49,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:12:49,873 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:49,874 INFO L82 PathProgramCache]: Analyzing trace with hash 587060503, now seen corresponding path program 1 times [2020-10-12 16:12:49,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:49,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194257057] [2020-10-12 16:12:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:49,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:50,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:12:50,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:12:50,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-12 16:12:50,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:50,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:50,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:50,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:12:50,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:50,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:50,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:50,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:50,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:50,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:50,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:50,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:50,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:50,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:50,703 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 16:12:50,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194257057] [2020-10-12 16:12:50,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:50,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:12:50,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401081103] [2020-10-12 16:12:50,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:12:50,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:50,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:12:50,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:50,708 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand 10 states. [2020-10-12 16:12:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:51,248 INFO L93 Difference]: Finished difference Result 65 states and 92 transitions. [2020-10-12 16:12:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:12:51,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-12 16:12:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:51,250 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:12:51,250 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:12:51,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:51,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:12:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-12 16:12:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:12:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-10-12 16:12:51,259 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 19 [2020-10-12 16:12:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:51,259 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-10-12 16:12:51,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:12:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-10-12 16:12:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:12:51,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:51,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:51,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:12:51,261 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1837594688, now seen corresponding path program 1 times [2020-10-12 16:12:51,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:51,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478321553] [2020-10-12 16:12:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:12:51,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:51,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-12 16:12:51,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:12:51,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:51,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:12:51,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:51,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:51,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:51,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:51,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:12:51,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478321553] [2020-10-12 16:12:51,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:51,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:12:51,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575038340] [2020-10-12 16:12:51,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:12:51,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:51,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:12:51,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:12:51,384 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 4 states. [2020-10-12 16:12:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:51,465 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-10-12 16:12:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:12:51,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-12 16:12:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:51,467 INFO L225 Difference]: With dead ends: 62 [2020-10-12 16:12:51,467 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:12:51,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 16:12:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:12:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-12 16:12:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:12:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2020-10-12 16:12:51,483 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 20 [2020-10-12 16:12:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:51,483 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2020-10-12 16:12:51,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:12:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2020-10-12 16:12:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:12:51,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:51,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:51,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:12:51,488 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1596962185, now seen corresponding path program 1 times [2020-10-12 16:12:51,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:51,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339129770] [2020-10-12 16:12:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:12:51,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:51,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-12 16:12:51,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:12:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:51,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:12:51,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:52,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:52,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:52,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:52,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:52,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:52,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:52,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:52,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:12:52,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339129770] [2020-10-12 16:12:52,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:52,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:12:52,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755655210] [2020-10-12 16:12:52,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:12:52,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:52,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:12:52,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:52,105 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand 10 states. [2020-10-12 16:12:52,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:52,547 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-10-12 16:12:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:12:52,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-12 16:12:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:52,549 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:12:52,549 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:12:52,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:12:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 16:12:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:12:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2020-10-12 16:12:52,557 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 21 [2020-10-12 16:12:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:52,558 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2020-10-12 16:12:52,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:12:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2020-10-12 16:12:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:12:52,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:52,561 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:52,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:12:52,562 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:52,563 INFO L82 PathProgramCache]: Analyzing trace with hash -79204680, now seen corresponding path program 1 times [2020-10-12 16:12:52,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:52,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961509812] [2020-10-12 16:12:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:53,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:12:53,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:12:53,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-12 16:12:53,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:53,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:12:53,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:56,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:56,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:56,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:56,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:56,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:56,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:56,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:56,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:56,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:12:56,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961509812] [2020-10-12 16:12:56,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:56,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:12:56,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596730954] [2020-10-12 16:12:56,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:12:56,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:56,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:12:56,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2020-10-12 16:12:56,146 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 11 states. [2020-10-12 16:12:56,593 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-12 16:12:56,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:56,795 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2020-10-12 16:12:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:12:56,796 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-12 16:12:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:56,797 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:12:56,797 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:12:56,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=42, Invalid=167, Unknown=1, NotChecked=0, Total=210 [2020-10-12 16:12:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:12:56,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-12 16:12:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:12:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2020-10-12 16:12:56,803 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 21 [2020-10-12 16:12:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:56,804 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2020-10-12 16:12:56,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:12:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2020-10-12 16:12:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:12:56,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:56,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:56,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:12:56,807 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:56,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1620071338, now seen corresponding path program 2 times [2020-10-12 16:12:56,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:56,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934382966] [2020-10-12 16:12:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:56,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:57,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:57,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:57,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:12:57,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:12:57,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-12 16:12:57,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:12:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:12:57,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:12:57,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:57,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:57,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:57,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:57,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:57,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:57,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:57,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:57,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:57,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:57,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:57,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:57,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934382966] [2020-10-12 16:12:57,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:57,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:12:57,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237928329] [2020-10-12 16:12:57,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:12:57,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:12:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:12:57,883 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand 6 states. [2020-10-12 16:12:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:58,012 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2020-10-12 16:12:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:12:58,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-12 16:12:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:58,014 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:12:58,015 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:12:58,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:12:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:12:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 16:12:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:12:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2020-10-12 16:12:58,023 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 21 [2020-10-12 16:12:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:58,023 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2020-10-12 16:12:58,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:12:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-10-12 16:12:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:12:58,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:58,025 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] [2020-10-12 16:12:58,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:12:58,025 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:58,025 INFO L82 PathProgramCache]: Analyzing trace with hash -478971472, now seen corresponding path program 2 times [2020-10-12 16:12:58,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:58,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960509805] [2020-10-12 16:12:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:58,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:59,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:12:59,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:12:59,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-12 16:12:59,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:59,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:12:59,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:59,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:12:59,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:12:59,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:59,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:59,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:59,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:59,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:59,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:59,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:59,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:59,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:59,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:12:59,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960509805] [2020-10-12 16:12:59,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:59,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:12:59,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016206957] [2020-10-12 16:12:59,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:12:59,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:12:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:59,849 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 11 states. [2020-10-12 16:13:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:00,244 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2020-10-12 16:13:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:13:00,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-12 16:13:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:00,245 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:13:00,245 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:13:00,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:13:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:13:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 16:13:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:13:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2020-10-12 16:13:00,257 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 22 [2020-10-12 16:13:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:00,258 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2020-10-12 16:13:00,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:13:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2020-10-12 16:13:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:13:00,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:00,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:00,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:13:00,262 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:00,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1502837119, now seen corresponding path program 3 times [2020-10-12 16:13:00,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:00,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916463399] [2020-10-12 16:13:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:00,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:01,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:13:01,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:01,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-12 16:13:01,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:01,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:13:01,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:13:01,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:01,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:01,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:01,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:01,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:01,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:01,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:01,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:01,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916463399] [2020-10-12 16:13:01,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:01,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:13:01,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491091437] [2020-10-12 16:13:01,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:13:01,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:01,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:13:01,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:01,791 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand 13 states. [2020-10-12 16:13:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:04,529 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2020-10-12 16:13:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:13:04,530 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-12 16:13:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:04,531 INFO L225 Difference]: With dead ends: 66 [2020-10-12 16:13:04,531 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 16:13:04,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:13:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 16:13:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-12 16:13:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:13:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2020-10-12 16:13:04,540 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 22 [2020-10-12 16:13:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:04,540 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2020-10-12 16:13:04,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:13:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2020-10-12 16:13:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:13:04,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:04,541 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] [2020-10-12 16:13:04,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:13:04,541 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2095055766, now seen corresponding path program 2 times [2020-10-12 16:13:04,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:04,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682512524] [2020-10-12 16:13:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:04,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:04,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:13:04,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:04,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-12 16:13:04,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:04,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:13:04,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:13:04,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:13:04,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:05,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:05,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:05,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:05,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:05,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:05,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:13:05,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682512524] [2020-10-12 16:13:05,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:05,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:13:05,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821237601] [2020-10-12 16:13:05,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:13:05,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:05,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:13:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:13:05,024 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 6 states. [2020-10-12 16:13:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:05,122 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2020-10-12 16:13:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:13:05,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-12 16:13:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:05,124 INFO L225 Difference]: With dead ends: 82 [2020-10-12 16:13:05,124 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 16:13:05,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:13:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 16:13:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2020-10-12 16:13:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:13:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2020-10-12 16:13:05,137 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 23 [2020-10-12 16:13:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:05,138 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2020-10-12 16:13:05,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:13:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2020-10-12 16:13:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:13:05,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:05,143 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:05,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:13:05,143 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash -755373050, now seen corresponding path program 1 times [2020-10-12 16:13:05,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:05,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471136192] [2020-10-12 16:13:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:05,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:05,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:13:05,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:05,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-12 16:13:05,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:05,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:13:05,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:05,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:05,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:05,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:05,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:05,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:05,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:05,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:05,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471136192] [2020-10-12 16:13:05,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:05,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:13:05,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898528735] [2020-10-12 16:13:05,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:13:05,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:05,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:13:05,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:13:05,831 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand 9 states. [2020-10-12 16:13:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:06,042 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2020-10-12 16:13:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:13:06,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-12 16:13:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:06,043 INFO L225 Difference]: With dead ends: 136 [2020-10-12 16:13:06,044 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 16:13:06,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:13:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 16:13:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-10-12 16:13:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:13:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2020-10-12 16:13:06,082 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 23 [2020-10-12 16:13:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:06,084 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2020-10-12 16:13:06,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:13:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2020-10-12 16:13:06,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:13:06,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:06,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:06,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:13:06,086 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:06,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1960585505, now seen corresponding path program 3 times [2020-10-12 16:13:06,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:06,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248253675] [2020-10-12 16:13:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:06,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:06,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:13:06,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:06,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-12 16:13:06,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:06,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:13:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:13:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:13:06,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:06,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:06,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:06,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:06,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:06,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:06,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:06,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:06,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:06,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:06,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:13:06,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248253675] [2020-10-12 16:13:06,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:06,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:13:06,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274703852] [2020-10-12 16:13:06,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:13:06,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:06,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:13:06,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:13:06,330 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand 6 states. [2020-10-12 16:13:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:06,488 INFO L93 Difference]: Finished difference Result 164 states and 231 transitions. [2020-10-12 16:13:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:13:06,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-12 16:13:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:06,490 INFO L225 Difference]: With dead ends: 164 [2020-10-12 16:13:06,490 INFO L226 Difference]: Without dead ends: 141 [2020-10-12 16:13:06,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:13:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-12 16:13:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 106. [2020-10-12 16:13:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 16:13:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2020-10-12 16:13:06,505 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 24 [2020-10-12 16:13:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:06,505 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2020-10-12 16:13:06,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:13:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2020-10-12 16:13:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:13:06,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:06,506 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:06,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:13:06,507 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1235526881, now seen corresponding path program 2 times [2020-10-12 16:13:06,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:06,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383160566] [2020-10-12 16:13:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:06,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:07,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:13:07,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:07,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-12 16:13:07,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:07,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:13:07,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:07,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:13:07,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:07,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:07,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:07,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:07,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:07,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:07,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:07,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:07,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:07,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:07,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:07,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383160566] [2020-10-12 16:13:07,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:07,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:13:07,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938323867] [2020-10-12 16:13:07,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:13:07,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:07,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:13:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:13:07,255 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand 10 states. [2020-10-12 16:13:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:07,692 INFO L93 Difference]: Finished difference Result 186 states and 264 transitions. [2020-10-12 16:13:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:13:07,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 16:13:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:07,695 INFO L225 Difference]: With dead ends: 186 [2020-10-12 16:13:07,695 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 16:13:07,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:07,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 16:13:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2020-10-12 16:13:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 16:13:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 184 transitions. [2020-10-12 16:13:07,717 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 184 transitions. Word has length 24 [2020-10-12 16:13:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:07,718 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 184 transitions. [2020-10-12 16:13:07,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:13:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 184 transitions. [2020-10-12 16:13:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:13:07,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:07,719 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:07,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:13:07,720 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:07,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:07,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1059573542, now seen corresponding path program 3 times [2020-10-12 16:13:07,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:07,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002802096] [2020-10-12 16:13:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:08,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:08,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:13:08,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:08,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-12 16:13:08,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:13:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:13:08,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:08,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:08,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:08,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:08,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:08,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:08,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:08,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:08,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:08,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:08,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:08,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002802096] [2020-10-12 16:13:08,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:08,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:13:08,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589802946] [2020-10-12 16:13:08,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:13:08,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:13:08,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:13:08,373 INFO L87 Difference]: Start difference. First operand 137 states and 184 transitions. Second operand 11 states. [2020-10-12 16:13:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:08,752 INFO L93 Difference]: Finished difference Result 222 states and 316 transitions. [2020-10-12 16:13:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:13:08,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-12 16:13:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:08,754 INFO L225 Difference]: With dead ends: 222 [2020-10-12 16:13:08,754 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 16:13:08,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:13:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 16:13:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2020-10-12 16:13:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 16:13:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 208 transitions. [2020-10-12 16:13:08,769 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 208 transitions. Word has length 25 [2020-10-12 16:13:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:08,769 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 208 transitions. [2020-10-12 16:13:08,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:13:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 208 transitions. [2020-10-12 16:13:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:13:08,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:08,770 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:08,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:13:08,771 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash 446020736, now seen corresponding path program 4 times [2020-10-12 16:13:08,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:08,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886804635] [2020-10-12 16:13:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:08,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:08,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:08,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:08,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:09,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:09,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:13:09,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:09,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-12 16:13:09,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:09,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:13:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:13:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:09,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:09,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:09,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:09,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:09,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:09,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:09,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:09,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:09,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:13:09,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886804635] [2020-10-12 16:13:09,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:09,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:13:09,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763951318] [2020-10-12 16:13:09,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:13:09,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:09,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:13:09,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:13:09,903 INFO L87 Difference]: Start difference. First operand 154 states and 208 transitions. Second operand 6 states. [2020-10-12 16:13:10,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:10,372 INFO L93 Difference]: Finished difference Result 262 states and 368 transitions. [2020-10-12 16:13:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:13:10,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-12 16:13:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:10,375 INFO L225 Difference]: With dead ends: 262 [2020-10-12 16:13:10,375 INFO L226 Difference]: Without dead ends: 251 [2020-10-12 16:13:10,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:13:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-12 16:13:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 172. [2020-10-12 16:13:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 16:13:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 230 transitions. [2020-10-12 16:13:10,392 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 230 transitions. Word has length 26 [2020-10-12 16:13:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:10,393 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 230 transitions. [2020-10-12 16:13:10,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:13:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 230 transitions. [2020-10-12 16:13:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:13:10,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:10,394 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:10,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:13:10,394 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash -806757377, now seen corresponding path program 4 times [2020-10-12 16:13:10,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:10,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120115926] [2020-10-12 16:13:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:10,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:10,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:10,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:10,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:10,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:10,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:13:10,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:10,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-12 16:13:10,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:13:10,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:10,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:13:10,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:11,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:11,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:11,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:11,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:11,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:11,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:11,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:11,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:11,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:11,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:11,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120115926] [2020-10-12 16:13:11,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:11,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:13:11,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058134405] [2020-10-12 16:13:11,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:13:11,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:11,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:13:11,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:13:11,209 INFO L87 Difference]: Start difference. First operand 172 states and 230 transitions. Second operand 12 states. [2020-10-12 16:13:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:11,816 INFO L93 Difference]: Finished difference Result 271 states and 387 transitions. [2020-10-12 16:13:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:13:11,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-12 16:13:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:11,818 INFO L225 Difference]: With dead ends: 271 [2020-10-12 16:13:11,818 INFO L226 Difference]: Without dead ends: 233 [2020-10-12 16:13:11,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:13:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-12 16:13:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 191. [2020-10-12 16:13:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-12 16:13:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2020-10-12 16:13:11,839 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 26 [2020-10-12 16:13:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:11,839 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2020-10-12 16:13:11,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:13:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2020-10-12 16:13:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:13:11,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:11,841 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:11,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:13:11,841 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2015666696, now seen corresponding path program 5 times [2020-10-12 16:13:11,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:11,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920119791] [2020-10-12 16:13:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:11,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:12,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:12,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:16,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:13:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4244 [2020-10-12 16:13:16,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:13:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:13:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:16,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:16,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:16,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:16,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:16,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:16,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:16,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:16,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:16,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:16,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:13:16,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920119791] [2020-10-12 16:13:16,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:16,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:13:16,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170259970] [2020-10-12 16:13:16,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:13:16,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:16,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:13:16,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:13:16,237 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand 10 states. [2020-10-12 16:13:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:17,548 INFO L93 Difference]: Finished difference Result 286 states and 386 transitions. [2020-10-12 16:13:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:13:17,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-12 16:13:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:17,550 INFO L225 Difference]: With dead ends: 286 [2020-10-12 16:13:17,550 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 16:13:17,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:13:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 16:13:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 198. [2020-10-12 16:13:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 16:13:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 268 transitions. [2020-10-12 16:13:17,569 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 268 transitions. Word has length 27 [2020-10-12 16:13:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:17,569 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 268 transitions. [2020-10-12 16:13:17,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:13:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 268 transitions. [2020-10-12 16:13:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:13:17,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:17,570 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:17,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:13:17,570 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:17,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1466526278, now seen corresponding path program 5 times [2020-10-12 16:13:17,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:17,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914853594] [2020-10-12 16:13:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:18,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:18,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:13:18,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:18,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-12 16:13:18,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:18,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:13:18,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:13:18,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:18,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:18,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:18,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:18,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:18,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:18,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:18,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:18,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:18,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:18,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:18,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:18,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914853594] [2020-10-12 16:13:18,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:18,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:13:18,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124921768] [2020-10-12 16:13:18,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:13:18,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:13:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:18,367 INFO L87 Difference]: Start difference. First operand 198 states and 268 transitions. Second operand 13 states. [2020-10-12 16:13:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:18,962 INFO L93 Difference]: Finished difference Result 324 states and 469 transitions. [2020-10-12 16:13:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:13:18,963 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-12 16:13:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:18,964 INFO L225 Difference]: With dead ends: 324 [2020-10-12 16:13:18,964 INFO L226 Difference]: Without dead ends: 269 [2020-10-12 16:13:18,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-12 16:13:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 217. [2020-10-12 16:13:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-12 16:13:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 295 transitions. [2020-10-12 16:13:18,986 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 295 transitions. Word has length 27 [2020-10-12 16:13:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:18,986 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 295 transitions. [2020-10-12 16:13:18,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:13:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 295 transitions. [2020-10-12 16:13:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:13:18,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:18,987 INFO L422 BasicCegarLoop]: trace histogram [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 16:13:18,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:13:18,988 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:18,988 INFO L82 PathProgramCache]: Analyzing trace with hash -576518495, now seen corresponding path program 1 times [2020-10-12 16:13:18,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:18,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293868568] [2020-10-12 16:13:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:19,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:19,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:19,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:19,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:19,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:19,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:20,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:20,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:13:20,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:20,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-12 16:13:20,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:13:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:13:20,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:24,707 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 32 DAG size of output: 14 [2020-10-12 16:13:24,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:24,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:24,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:24,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:24,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:24,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:24,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:24,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:24,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:24,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:24,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:24,967 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 16:13:24,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293868568] [2020-10-12 16:13:24,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:24,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:13:24,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582754606] [2020-10-12 16:13:24,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:13:24,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:24,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:13:24,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=234, Unknown=1, NotChecked=0, Total=272 [2020-10-12 16:13:24,970 INFO L87 Difference]: Start difference. First operand 217 states and 295 transitions. Second operand 17 states. [2020-10-12 16:13:31,756 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2020-10-12 16:13:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:33,920 INFO L93 Difference]: Finished difference Result 225 states and 302 transitions. [2020-10-12 16:13:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:13:33,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-12 16:13:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:33,926 INFO L225 Difference]: With dead ends: 225 [2020-10-12 16:13:33,926 INFO L226 Difference]: Without dead ends: 214 [2020-10-12 16:13:33,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=58, Invalid=361, Unknown=1, NotChecked=0, Total=420 [2020-10-12 16:13:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-12 16:13:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-12 16:13:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 16:13:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 291 transitions. [2020-10-12 16:13:33,945 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 291 transitions. Word has length 28 [2020-10-12 16:13:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:33,945 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 291 transitions. [2020-10-12 16:13:33,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:13:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 291 transitions. [2020-10-12 16:13:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:13:33,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:33,946 INFO L422 BasicCegarLoop]: trace histogram [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 16:13:33,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:13:33,947 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1861508062, now seen corresponding path program 2 times [2020-10-12 16:13:33,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:33,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187273890] [2020-10-12 16:13:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:34,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:34,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:34,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:34,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:35,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:35,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:13:35,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:35,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1436 [2020-10-12 16:13:35,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:13:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:13:35,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:35,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:35,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:35,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:35,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:35,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:35,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:35,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:35,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187273890] [2020-10-12 16:13:35,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:35,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:13:35,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727006517] [2020-10-12 16:13:35,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:13:35,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:13:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:13:35,811 INFO L87 Difference]: Start difference. First operand 214 states and 291 transitions. Second operand 14 states. [2020-10-12 16:13:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:36,557 INFO L93 Difference]: Finished difference Result 297 states and 411 transitions. [2020-10-12 16:13:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:13:36,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-12 16:13:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:36,559 INFO L225 Difference]: With dead ends: 297 [2020-10-12 16:13:36,560 INFO L226 Difference]: Without dead ends: 264 [2020-10-12 16:13:36,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:13:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-12 16:13:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 221. [2020-10-12 16:13:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-12 16:13:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 298 transitions. [2020-10-12 16:13:36,579 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 298 transitions. Word has length 28 [2020-10-12 16:13:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:36,579 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 298 transitions. [2020-10-12 16:13:36,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:13:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 298 transitions. [2020-10-12 16:13:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:13:36,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:36,580 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:36,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:13:36,581 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash -490616127, now seen corresponding path program 4 times [2020-10-12 16:13:36,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:36,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612573096] [2020-10-12 16:13:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:36,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:36,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:36,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:36,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:37,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:37,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:38,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:38,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:13:38,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:38,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-10-12 16:13:38,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:13:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:13:38,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:39,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:39,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:39,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:39,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:39,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:39,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:39,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:39,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:39,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:39,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612573096] [2020-10-12 16:13:39,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:39,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:13:39,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892102219] [2020-10-12 16:13:39,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:13:39,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:39,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:13:39,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:13:39,182 INFO L87 Difference]: Start difference. First operand 221 states and 298 transitions. Second operand 19 states. [2020-10-12 16:13:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:40,329 INFO L93 Difference]: Finished difference Result 307 states and 422 transitions. [2020-10-12 16:13:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:13:40,330 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-12 16:13:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:40,331 INFO L225 Difference]: With dead ends: 307 [2020-10-12 16:13:40,331 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 16:13:40,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:13:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 16:13:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 237. [2020-10-12 16:13:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 16:13:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 321 transitions. [2020-10-12 16:13:40,352 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 321 transitions. Word has length 28 [2020-10-12 16:13:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:40,352 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 321 transitions. [2020-10-12 16:13:40,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:13:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 321 transitions. [2020-10-12 16:13:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:13:40,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:40,354 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:40,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:13:40,354 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1076124449, now seen corresponding path program 6 times [2020-10-12 16:13:40,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:40,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842042502] [2020-10-12 16:13:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:40,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:40,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:40,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:40,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:40,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:41,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:41,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:13:41,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:41,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-10-12 16:13:41,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:41,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:13:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:13:41,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:41,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:41,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:41,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:41,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:41,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:41,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:41,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:41,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:41,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:41,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:41,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842042502] [2020-10-12 16:13:41,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:41,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:13:41,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194810833] [2020-10-12 16:13:41,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:13:41,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:41,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:13:41,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:13:41,399 INFO L87 Difference]: Start difference. First operand 237 states and 321 transitions. Second operand 14 states. [2020-10-12 16:13:42,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:42,071 INFO L93 Difference]: Finished difference Result 379 states and 549 transitions. [2020-10-12 16:13:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:13:42,072 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-12 16:13:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:42,074 INFO L225 Difference]: With dead ends: 379 [2020-10-12 16:13:42,074 INFO L226 Difference]: Without dead ends: 324 [2020-10-12 16:13:42,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:13:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-12 16:13:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 257. [2020-10-12 16:13:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-12 16:13:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 350 transitions. [2020-10-12 16:13:42,095 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 350 transitions. Word has length 28 [2020-10-12 16:13:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:42,095 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 350 transitions. [2020-10-12 16:13:42,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:13:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 350 transitions. [2020-10-12 16:13:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:13:42,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:42,097 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:42,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:13:42,097 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash -885831850, now seen corresponding path program 6 times [2020-10-12 16:13:42,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:42,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655251633] [2020-10-12 16:13:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:42,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:43,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:43,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:13:43,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:43,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-10-12 16:13:43,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:13:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:13:43,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:13:43,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:43,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:43,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:43,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:43,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:43,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:43,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:43,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:43,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:43,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:43,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 16:13:43,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655251633] [2020-10-12 16:13:43,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:43,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:13:43,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644025814] [2020-10-12 16:13:43,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:13:43,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:13:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:13:43,316 INFO L87 Difference]: Start difference. First operand 257 states and 350 transitions. Second operand 7 states. [2020-10-12 16:13:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:44,332 INFO L93 Difference]: Finished difference Result 468 states and 669 transitions. [2020-10-12 16:13:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:13:44,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-12 16:13:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:44,335 INFO L225 Difference]: With dead ends: 468 [2020-10-12 16:13:44,335 INFO L226 Difference]: Without dead ends: 460 [2020-10-12 16:13:44,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-12 16:13:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 263. [2020-10-12 16:13:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-12 16:13:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 360 transitions. [2020-10-12 16:13:44,361 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 360 transitions. Word has length 29 [2020-10-12 16:13:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:44,362 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 360 transitions. [2020-10-12 16:13:44,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:13:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 360 transitions. [2020-10-12 16:13:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:13:44,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:44,363 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:44,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:13:44,363 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1706081638, now seen corresponding path program 7 times [2020-10-12 16:13:44,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:44,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090582705] [2020-10-12 16:13:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:44,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:45,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:45,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:13:45,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:45,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-12 16:13:45,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:45,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:13:45,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:45,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:13:45,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:45,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:45,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:45,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:45,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:45,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:45,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:45,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:45,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:45,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090582705] [2020-10-12 16:13:45,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:45,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:13:45,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021617124] [2020-10-12 16:13:45,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:13:45,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:13:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:13:45,606 INFO L87 Difference]: Start difference. First operand 263 states and 360 transitions. Second operand 15 states. [2020-10-12 16:13:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:46,380 INFO L93 Difference]: Finished difference Result 416 states and 606 transitions. [2020-10-12 16:13:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:13:46,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-12 16:13:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:46,383 INFO L225 Difference]: With dead ends: 416 [2020-10-12 16:13:46,384 INFO L226 Difference]: Without dead ends: 361 [2020-10-12 16:13:46,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:13:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-12 16:13:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 284. [2020-10-12 16:13:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-12 16:13:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 391 transitions. [2020-10-12 16:13:46,410 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 391 transitions. Word has length 29 [2020-10-12 16:13:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:46,410 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 391 transitions. [2020-10-12 16:13:46,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:13:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 391 transitions. [2020-10-12 16:13:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:13:46,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:46,412 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:46,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:13:46,412 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash 517880257, now seen corresponding path program 3 times [2020-10-12 16:13:46,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:46,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891833619] [2020-10-12 16:13:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:46,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:46,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:46,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:46,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:46,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:46,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:13:46,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:46,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-12 16:13:46,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:13:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:13:46,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:47,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:47,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:47,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:47,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:47,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:47,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:47,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:47,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:47,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:47,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:47,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:47,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891833619] [2020-10-12 16:13:47,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:47,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:13:47,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547722955] [2020-10-12 16:13:47,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:13:47,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:47,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:13:47,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:13:47,975 INFO L87 Difference]: Start difference. First operand 284 states and 391 transitions. Second operand 19 states. [2020-10-12 16:13:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:48,663 INFO L93 Difference]: Finished difference Result 293 states and 399 transitions. [2020-10-12 16:13:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:13:48,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-12 16:13:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:48,665 INFO L225 Difference]: With dead ends: 293 [2020-10-12 16:13:48,665 INFO L226 Difference]: Without dead ends: 281 [2020-10-12 16:13:48,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:13:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-12 16:13:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2020-10-12 16:13:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-12 16:13:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 387 transitions. [2020-10-12 16:13:48,689 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 387 transitions. Word has length 30 [2020-10-12 16:13:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:48,689 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 387 transitions. [2020-10-12 16:13:48,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:13:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 387 transitions. [2020-10-12 16:13:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:13:48,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:48,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:48,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:13:48,691 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:48,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:48,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1029274942, now seen corresponding path program 4 times [2020-10-12 16:13:48,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:48,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098545705] [2020-10-12 16:13:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:48,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:48,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:48,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:48,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:13:48,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:48,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-12 16:13:48,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:48,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:13:48,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:13:48,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:48,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:48,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:48,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:48,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:48,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:48,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:48,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:48,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:48,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 16:13:48,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098545705] [2020-10-12 16:13:48,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:48,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:13:48,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966285052] [2020-10-12 16:13:48,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:13:48,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:48,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:13:48,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:13:48,956 INFO L87 Difference]: Start difference. First operand 281 states and 387 transitions. Second operand 7 states. [2020-10-12 16:13:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:49,220 INFO L93 Difference]: Finished difference Result 476 states and 674 transitions. [2020-10-12 16:13:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:13:49,220 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-12 16:13:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:49,222 INFO L225 Difference]: With dead ends: 476 [2020-10-12 16:13:49,222 INFO L226 Difference]: Without dead ends: 446 [2020-10-12 16:13:49,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:13:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-12 16:13:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 288. [2020-10-12 16:13:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-12 16:13:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 391 transitions. [2020-10-12 16:13:49,250 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 391 transitions. Word has length 30 [2020-10-12 16:13:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:49,250 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 391 transitions. [2020-10-12 16:13:49,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:13:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 391 transitions. [2020-10-12 16:13:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:13:49,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:49,251 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:49,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:13:49,251 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2137882017, now seen corresponding path program 2 times [2020-10-12 16:13:49,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:49,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226771851] [2020-10-12 16:13:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:49,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:49,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:49,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:50,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:50,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:13:50,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:50,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-10-12 16:13:50,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:50,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:13:50,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:13:50,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:13:50,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:50,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:50,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:50,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:50,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:50,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:50,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:50,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:50,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:50,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:50,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 16:13:50,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226771851] [2020-10-12 16:13:50,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:50,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:13:50,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577487149] [2020-10-12 16:13:50,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:13:50,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:50,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:13:50,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:13:50,472 INFO L87 Difference]: Start difference. First operand 288 states and 391 transitions. Second operand 7 states. [2020-10-12 16:13:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:53,408 INFO L93 Difference]: Finished difference Result 524 states and 710 transitions. [2020-10-12 16:13:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:13:53,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-12 16:13:53,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:53,411 INFO L225 Difference]: With dead ends: 524 [2020-10-12 16:13:53,411 INFO L226 Difference]: Without dead ends: 501 [2020-10-12 16:13:53,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-12 16:13:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 308. [2020-10-12 16:13:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-12 16:13:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 416 transitions. [2020-10-12 16:13:53,440 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 416 transitions. Word has length 30 [2020-10-12 16:13:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:53,440 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 416 transitions. [2020-10-12 16:13:53,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:13:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 416 transitions. [2020-10-12 16:13:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:13:53,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:53,442 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:53,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:13:53,442 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2055124415, now seen corresponding path program 8 times [2020-10-12 16:13:53,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:53,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628234978] [2020-10-12 16:13:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:53,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:53,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:53,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:54,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:54,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:54,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:13:54,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:13:54,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1353 [2020-10-12 16:13:54,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:54,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:13:54,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:54,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:13:54,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:55,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:55,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:55,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:55,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:55,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:55,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:55,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:55,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:55,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:55,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:55,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:13:55,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628234978] [2020-10-12 16:13:55,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:55,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:13:55,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087358231] [2020-10-12 16:13:55,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:13:55,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:13:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:55,072 INFO L87 Difference]: Start difference. First operand 308 states and 416 transitions. Second operand 16 states. [2020-10-12 16:13:55,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:55,949 INFO L93 Difference]: Finished difference Result 488 states and 704 transitions. [2020-10-12 16:13:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:13:55,950 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-12 16:13:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:55,952 INFO L225 Difference]: With dead ends: 488 [2020-10-12 16:13:55,952 INFO L226 Difference]: Without dead ends: 421 [2020-10-12 16:13:55,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:13:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-12 16:13:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 331. [2020-10-12 16:13:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-12 16:13:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 449 transitions. [2020-10-12 16:13:55,976 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 449 transitions. Word has length 30 [2020-10-12 16:13:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:55,976 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 449 transitions. [2020-10-12 16:13:55,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:13:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 449 transitions. [2020-10-12 16:13:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:13:55,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:55,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:55,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:13:55,978 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:55,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1871589000, now seen corresponding path program 5 times [2020-10-12 16:13:55,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:55,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676195577] [2020-10-12 16:13:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:55,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:57,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:57,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:13:57,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:13:57,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1947 [2020-10-12 16:13:57,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:57,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:13:57,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:57,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:13:57,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:05,014 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-12 16:14:05,636 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-12 16:14:08,337 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-12 16:14:08,722 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-12 16:14:12,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:12,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:12,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:12,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:12,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:12,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:12,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:12,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:12,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:12,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:12,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:12,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676195577] [2020-10-12 16:14:12,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:12,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:14:12,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066922468] [2020-10-12 16:14:12,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:14:12,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:12,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:14:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=369, Unknown=2, NotChecked=0, Total=420 [2020-10-12 16:14:12,258 INFO L87 Difference]: Start difference. First operand 331 states and 449 transitions. Second operand 21 states. [2020-10-12 16:14:14,720 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-12 16:14:15,486 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-12 16:14:18,665 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-12 16:14:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:21,112 INFO L93 Difference]: Finished difference Result 361 states and 491 transitions. [2020-10-12 16:14:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:14:21,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-10-12 16:14:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:21,115 INFO L225 Difference]: With dead ends: 361 [2020-10-12 16:14:21,115 INFO L226 Difference]: Without dead ends: 344 [2020-10-12 16:14:21,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=75, Invalid=573, Unknown=2, NotChecked=0, Total=650 [2020-10-12 16:14:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-12 16:14:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2020-10-12 16:14:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-12 16:14:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 462 transitions. [2020-10-12 16:14:21,146 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 462 transitions. Word has length 31 [2020-10-12 16:14:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:21,146 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 462 transitions. [2020-10-12 16:14:21,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:14:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 462 transitions. [2020-10-12 16:14:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:14:21,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:21,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:21,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:14:21,148 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:21,148 INFO L82 PathProgramCache]: Analyzing trace with hash -155989097, now seen corresponding path program 5 times [2020-10-12 16:14:21,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:21,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15268077] [2020-10-12 16:14:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:21,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:21,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:24,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:14:24,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:14:24,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3218 [2020-10-12 16:14:24,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:14:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:14:24,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:25,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:25,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:25,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:25,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:25,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:25,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:25,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15268077] [2020-10-12 16:14:25,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:25,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:25,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177752107] [2020-10-12 16:14:25,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:25,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:25,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:25,462 INFO L87 Difference]: Start difference. First operand 343 states and 462 transitions. Second operand 18 states. [2020-10-12 16:14:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:26,824 INFO L93 Difference]: Finished difference Result 570 states and 804 transitions. [2020-10-12 16:14:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:14:26,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-12 16:14:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:26,827 INFO L225 Difference]: With dead ends: 570 [2020-10-12 16:14:26,827 INFO L226 Difference]: Without dead ends: 483 [2020-10-12 16:14:26,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:26,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-12 16:14:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 405. [2020-10-12 16:14:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-12 16:14:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 533 transitions. [2020-10-12 16:14:26,876 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 533 transitions. Word has length 31 [2020-10-12 16:14:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:26,876 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 533 transitions. [2020-10-12 16:14:26,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 533 transitions. [2020-10-12 16:14:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:14:26,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:26,878 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:26,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:14:26,878 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:26,879 INFO L82 PathProgramCache]: Analyzing trace with hash -9451386, now seen corresponding path program 9 times [2020-10-12 16:14:26,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:26,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31129648] [2020-10-12 16:14:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:26,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:27,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:14:27,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:27,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-12 16:14:27,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:27,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:14:27,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:27,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:14:27,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:28,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:28,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:28,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:28,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:28,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:28,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:28,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:28,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:28,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31129648] [2020-10-12 16:14:28,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:28,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:14:28,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541632810] [2020-10-12 16:14:28,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:14:28,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:28,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:14:28,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:14:28,344 INFO L87 Difference]: Start difference. First operand 405 states and 533 transitions. Second operand 17 states. [2020-10-12 16:14:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:29,764 INFO L93 Difference]: Finished difference Result 606 states and 855 transitions. [2020-10-12 16:14:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:14:29,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-12 16:14:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:29,768 INFO L225 Difference]: With dead ends: 606 [2020-10-12 16:14:29,768 INFO L226 Difference]: Without dead ends: 539 [2020-10-12 16:14:29,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-10-12 16:14:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 432. [2020-10-12 16:14:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-10-12 16:14:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 571 transitions. [2020-10-12 16:14:29,809 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 571 transitions. Word has length 31 [2020-10-12 16:14:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:29,809 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 571 transitions. [2020-10-12 16:14:29,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:14:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 571 transitions. [2020-10-12 16:14:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:14:29,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:29,812 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:29,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:14:29,812 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1927142367, now seen corresponding path program 6 times [2020-10-12 16:14:29,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:29,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704683451] [2020-10-12 16:14:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:29,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:30,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:30,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:30,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:30,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:14:30,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:30,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-12 16:14:30,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:30,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:14:30,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:30,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:14:30,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:33,640 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-10-12 16:14:34,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:34,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:34,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:34,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:34,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:34,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:34,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:34,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:34,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:34,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:34,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704683451] [2020-10-12 16:14:34,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:34,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:14:34,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759091680] [2020-10-12 16:14:34,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:14:34,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:34,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:14:34,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:14:34,330 INFO L87 Difference]: Start difference. First operand 432 states and 571 transitions. Second operand 21 states. [2020-10-12 16:14:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:37,208 INFO L93 Difference]: Finished difference Result 445 states and 583 transitions. [2020-10-12 16:14:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:14:37,208 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-12 16:14:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:37,211 INFO L225 Difference]: With dead ends: 445 [2020-10-12 16:14:37,211 INFO L226 Difference]: Without dead ends: 432 [2020-10-12 16:14:37,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:14:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-12 16:14:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2020-10-12 16:14:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-10-12 16:14:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 570 transitions. [2020-10-12 16:14:37,251 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 570 transitions. Word has length 32 [2020-10-12 16:14:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:37,251 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 570 transitions. [2020-10-12 16:14:37,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:14:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 570 transitions. [2020-10-12 16:14:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:14:37,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:37,253 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:37,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:14:37,253 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1611138943, now seen corresponding path program 7 times [2020-10-12 16:14:37,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:37,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47062581] [2020-10-12 16:14:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:37,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:37,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:38,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:14:38,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:38,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-12 16:14:38,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:38,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:14:38,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 16:14:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:14:38,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:38,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:38,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:38,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:38,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:38,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:38,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:38,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:38,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:38,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 16:14:38,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47062581] [2020-10-12 16:14:38,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:38,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:14:38,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475215958] [2020-10-12 16:14:38,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:14:38,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:38,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:14:38,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:14:38,720 INFO L87 Difference]: Start difference. First operand 432 states and 570 transitions. Second operand 8 states. [2020-10-12 16:14:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:41,293 INFO L93 Difference]: Finished difference Result 728 states and 945 transitions. [2020-10-12 16:14:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:14:41,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-12 16:14:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:41,297 INFO L225 Difference]: With dead ends: 728 [2020-10-12 16:14:41,297 INFO L226 Difference]: Without dead ends: 703 [2020-10-12 16:14:41,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:14:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-12 16:14:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 471. [2020-10-12 16:14:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-12 16:14:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 614 transitions. [2020-10-12 16:14:41,332 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 614 transitions. Word has length 32 [2020-10-12 16:14:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:41,333 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 614 transitions. [2020-10-12 16:14:41,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:14:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 614 transitions. [2020-10-12 16:14:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:14:41,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:41,334 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:41,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:14:41,334 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash 413208223, now seen corresponding path program 10 times [2020-10-12 16:14:41,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:41,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988067820] [2020-10-12 16:14:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:41,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:41,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:41,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:41,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:41,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:43,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:14:43,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:43,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1667 [2020-10-12 16:14:43,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:43,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:14:43,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:43,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:14:43,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:43,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:43,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:43,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:43,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:43,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:43,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:43,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:43,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988067820] [2020-10-12 16:14:43,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:43,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:43,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185457852] [2020-10-12 16:14:43,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:43,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:43,353 INFO L87 Difference]: Start difference. First operand 471 states and 614 transitions. Second operand 18 states. [2020-10-12 16:14:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:44,455 INFO L93 Difference]: Finished difference Result 698 states and 974 transitions. [2020-10-12 16:14:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:14:44,456 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-10-12 16:14:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:44,459 INFO L225 Difference]: With dead ends: 698 [2020-10-12 16:14:44,459 INFO L226 Difference]: Without dead ends: 614 [2020-10-12 16:14:44,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:14:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2020-10-12 16:14:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 500. [2020-10-12 16:14:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-12 16:14:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 654 transitions. [2020-10-12 16:14:44,495 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 654 transitions. Word has length 32 [2020-10-12 16:14:44,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:44,496 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 654 transitions. [2020-10-12 16:14:44,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 654 transitions. [2020-10-12 16:14:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:14:44,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:44,497 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:44,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:14:44,498 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1151585383, now seen corresponding path program 6 times [2020-10-12 16:14:44,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:44,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899200679] [2020-10-12 16:14:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:49,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:14:49,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:14:49,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:14:49,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:49,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:14:49,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:49,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:14:49,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:49,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:49,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:49,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:49,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:49,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:49,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:49,848 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 16:14:49,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899200679] [2020-10-12 16:14:49,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:49,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:14:49,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226040188] [2020-10-12 16:14:49,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:14:49,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:14:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:14:49,850 INFO L87 Difference]: Start difference. First operand 500 states and 654 transitions. Second operand 16 states. [2020-10-12 16:14:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:51,413 INFO L93 Difference]: Finished difference Result 611 states and 808 transitions. [2020-10-12 16:14:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:14:51,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-12 16:14:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:51,416 INFO L225 Difference]: With dead ends: 611 [2020-10-12 16:14:51,416 INFO L226 Difference]: Without dead ends: 530 [2020-10-12 16:14:51,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:14:51,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-12 16:14:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 501. [2020-10-12 16:14:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-12 16:14:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 652 transitions. [2020-10-12 16:14:51,455 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 652 transitions. Word has length 33 [2020-10-12 16:14:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:51,455 INFO L479 AbstractCegarLoop]: Abstraction has 501 states and 652 transitions. [2020-10-12 16:14:51,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:14:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 652 transitions. [2020-10-12 16:14:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:14:51,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:51,457 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:51,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:14:51,457 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash 630754214, now seen corresponding path program 11 times [2020-10-12 16:14:51,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:51,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145905558] [2020-10-12 16:14:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:51,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:14:52,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:52,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1078 [2020-10-12 16:14:52,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:14:52,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:52,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:14:52,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:53,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:53,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:53,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:53,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:53,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:53,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:53,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:53,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:53,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:53,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:53,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145905558] [2020-10-12 16:14:53,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:53,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:14:53,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104195323] [2020-10-12 16:14:53,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:14:53,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:53,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:14:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:14:53,020 INFO L87 Difference]: Start difference. First operand 501 states and 652 transitions. Second operand 19 states. [2020-10-12 16:14:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:54,446 INFO L93 Difference]: Finished difference Result 735 states and 1026 transitions. [2020-10-12 16:14:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:14:54,447 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-10-12 16:14:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:54,451 INFO L225 Difference]: With dead ends: 735 [2020-10-12 16:14:54,451 INFO L226 Difference]: Without dead ends: 651 [2020-10-12 16:14:54,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:14:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2020-10-12 16:14:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 530. [2020-10-12 16:14:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2020-10-12 16:14:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 692 transitions. [2020-10-12 16:14:54,489 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 692 transitions. Word has length 33 [2020-10-12 16:14:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:54,490 INFO L479 AbstractCegarLoop]: Abstraction has 530 states and 692 transitions. [2020-10-12 16:14:54,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:14:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 692 transitions. [2020-10-12 16:14:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:54,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:54,491 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:54,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:14:54,492 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash -869540031, now seen corresponding path program 8 times [2020-10-12 16:14:54,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:54,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941154753] [2020-10-12 16:14:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:54,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:55,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:55,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:55,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-12 16:14:55,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:14:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:14:55,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:56,593 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-12 16:14:57,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:57,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:57,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:57,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:57,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:57,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:57,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:57,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:57,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:57,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:57,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941154753] [2020-10-12 16:14:57,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:57,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:14:57,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710604705] [2020-10-12 16:14:57,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:14:57,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:57,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:14:57,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:14:57,641 INFO L87 Difference]: Start difference. First operand 530 states and 692 transitions. Second operand 24 states. [2020-10-12 16:14:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:58,563 INFO L93 Difference]: Finished difference Result 544 states and 705 transitions. [2020-10-12 16:14:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:14:58,564 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2020-10-12 16:14:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:58,567 INFO L225 Difference]: With dead ends: 544 [2020-10-12 16:14:58,567 INFO L226 Difference]: Without dead ends: 530 [2020-10-12 16:14:58,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-12 16:14:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 530. [2020-10-12 16:14:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2020-10-12 16:14:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 691 transitions. [2020-10-12 16:14:58,605 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 691 transitions. Word has length 34 [2020-10-12 16:14:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:58,605 INFO L479 AbstractCegarLoop]: Abstraction has 530 states and 691 transitions. [2020-10-12 16:14:58,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:14:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 691 transitions. [2020-10-12 16:14:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:58,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:58,607 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:58,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:14:58,607 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:58,608 INFO L82 PathProgramCache]: Analyzing trace with hash -942720159, now seen corresponding path program 9 times [2020-10-12 16:14:58,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:58,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813244887] [2020-10-12 16:14:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:58,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:58,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:58,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:58,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-12 16:14:58,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:14:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:14:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:14:58,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:59,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:59,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:59,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:59,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:59,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:59,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:59,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-12 16:14:59,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813244887] [2020-10-12 16:14:59,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:59,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:14:59,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588566663] [2020-10-12 16:14:59,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:14:59,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:59,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:14:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:14:59,070 INFO L87 Difference]: Start difference. First operand 530 states and 691 transitions. Second operand 8 states. [2020-10-12 16:15:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:00,292 INFO L93 Difference]: Finished difference Result 845 states and 1145 transitions. [2020-10-12 16:15:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:15:00,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-12 16:15:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:00,297 INFO L225 Difference]: With dead ends: 845 [2020-10-12 16:15:00,297 INFO L226 Difference]: Without dead ends: 809 [2020-10-12 16:15:00,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:15:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-10-12 16:15:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 509. [2020-10-12 16:15:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-12 16:15:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 668 transitions. [2020-10-12 16:15:00,325 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 668 transitions. Word has length 34 [2020-10-12 16:15:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:00,325 INFO L479 AbstractCegarLoop]: Abstraction has 509 states and 668 transitions. [2020-10-12 16:15:00,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:15:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 668 transitions. [2020-10-12 16:15:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:15:00,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:00,326 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:00,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:15:00,327 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:00,327 INFO L82 PathProgramCache]: Analyzing trace with hash -625230079, now seen corresponding path program 7 times [2020-10-12 16:15:00,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:00,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430758766] [2020-10-12 16:15:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:00,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:01,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:01,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:03,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:15:03,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:15:03,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-12 16:15:03,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:03,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:15:03,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:03,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:15:03,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:05,731 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2020-10-12 16:15:07,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:07,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:07,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:07,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:07,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:07,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:07,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:07,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:07,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:07,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430758766] [2020-10-12 16:15:07,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:07,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:15:07,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967671398] [2020-10-12 16:15:07,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:15:07,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:07,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:15:07,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:15:07,199 INFO L87 Difference]: Start difference. First operand 509 states and 668 transitions. Second operand 25 states. [2020-10-12 16:15:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:09,850 INFO L93 Difference]: Finished difference Result 787 states and 1104 transitions. [2020-10-12 16:15:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:15:09,851 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-12 16:15:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:09,854 INFO L225 Difference]: With dead ends: 787 [2020-10-12 16:15:09,854 INFO L226 Difference]: Without dead ends: 719 [2020-10-12 16:15:09,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:15:09,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2020-10-12 16:15:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 578. [2020-10-12 16:15:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-12 16:15:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 753 transitions. [2020-10-12 16:15:09,895 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 753 transitions. Word has length 34 [2020-10-12 16:15:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:09,896 INFO L479 AbstractCegarLoop]: Abstraction has 578 states and 753 transitions. [2020-10-12 16:15:09,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:15:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 753 transitions. [2020-10-12 16:15:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:15:09,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:09,897 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:09,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:15:09,898 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:09,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:09,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1215254657, now seen corresponding path program 12 times [2020-10-12 16:15:09,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:09,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744297979] [2020-10-12 16:15:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:09,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:10,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:15:10,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:15:10,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1051 [2020-10-12 16:15:10,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:15:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:15:10,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:11,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:11,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:11,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:11,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:11,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:11,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:11,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:11,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:11,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:11,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:11,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:15:11,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744297979] [2020-10-12 16:15:11,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:11,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:15:11,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079760480] [2020-10-12 16:15:11,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:15:11,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:11,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:15:11,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:15:11,375 INFO L87 Difference]: Start difference. First operand 578 states and 753 transitions. Second operand 20 states. [2020-10-12 16:15:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:12,803 INFO L93 Difference]: Finished difference Result 824 states and 1143 transitions. [2020-10-12 16:15:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:15:12,804 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2020-10-12 16:15:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:12,808 INFO L225 Difference]: With dead ends: 824 [2020-10-12 16:15:12,808 INFO L226 Difference]: Without dead ends: 740 [2020-10-12 16:15:12,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:15:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2020-10-12 16:15:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 609. [2020-10-12 16:15:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2020-10-12 16:15:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 796 transitions. [2020-10-12 16:15:12,841 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 796 transitions. Word has length 34 [2020-10-12 16:15:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:12,841 INFO L479 AbstractCegarLoop]: Abstraction has 609 states and 796 transitions. [2020-10-12 16:15:12,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:15:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 796 transitions. [2020-10-12 16:15:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:15:12,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:12,843 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:12,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:15:12,843 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:12,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1422442455, now seen corresponding path program 8 times [2020-10-12 16:15:12,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:12,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627245562] [2020-10-12 16:15:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:12,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:12,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:12,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:13,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:13,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:13,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:15,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:16,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:16,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:17,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:17,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:15:17,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:15:17,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:15:17,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:17,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:15:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:15:17,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:18,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:18,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:18,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:18,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:18,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:18,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:18,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:18,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:18,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:18,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627245562] [2020-10-12 16:15:18,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:18,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:15:18,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506938337] [2020-10-12 16:15:18,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:15:18,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:18,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:15:18,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:15:18,203 INFO L87 Difference]: Start difference. First operand 609 states and 796 transitions. Second operand 18 states. [2020-10-12 16:15:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:19,580 INFO L93 Difference]: Finished difference Result 727 states and 963 transitions. [2020-10-12 16:15:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:15:19,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-12 16:15:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:19,583 INFO L225 Difference]: With dead ends: 727 [2020-10-12 16:15:19,583 INFO L226 Difference]: Without dead ends: 645 [2020-10-12 16:15:19,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:15:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2020-10-12 16:15:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 610. [2020-10-12 16:15:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-10-12 16:15:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 794 transitions. [2020-10-12 16:15:19,614 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 794 transitions. Word has length 35 [2020-10-12 16:15:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:19,615 INFO L479 AbstractCegarLoop]: Abstraction has 610 states and 794 transitions. [2020-10-12 16:15:19,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:15:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 794 transitions. [2020-10-12 16:15:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:15:19,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:19,616 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:19,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:15:19,616 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:19,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:19,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1688012486, now seen corresponding path program 13 times [2020-10-12 16:15:19,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:19,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931465538] [2020-10-12 16:15:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:19,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:21,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:21,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:15:21,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:15:21,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2117 [2020-10-12 16:15:21,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:15:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:15:21,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:22,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:22,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:22,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:22,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:22,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:22,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:22,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:22,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:22,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:22,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:22,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:15:22,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931465538] [2020-10-12 16:15:22,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:22,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:15:22,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915839397] [2020-10-12 16:15:22,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:15:22,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:22,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:15:22,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:15:22,188 INFO L87 Difference]: Start difference. First operand 610 states and 794 transitions. Second operand 21 states. [2020-10-12 16:15:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:23,588 INFO L93 Difference]: Finished difference Result 862 states and 1196 transitions. [2020-10-12 16:15:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:15:23,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-12 16:15:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:23,593 INFO L225 Difference]: With dead ends: 862 [2020-10-12 16:15:23,593 INFO L226 Difference]: Without dead ends: 778 [2020-10-12 16:15:23,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:15:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-10-12 16:15:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 641. [2020-10-12 16:15:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-12 16:15:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 837 transitions. [2020-10-12 16:15:23,628 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 837 transitions. Word has length 35 [2020-10-12 16:15:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:23,629 INFO L479 AbstractCegarLoop]: Abstraction has 641 states and 837 transitions. [2020-10-12 16:15:23,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:15:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 837 transitions. [2020-10-12 16:15:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:15:23,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:23,630 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] [2020-10-12 16:15:23,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:15:23,631 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1618575777, now seen corresponding path program 10 times [2020-10-12 16:15:23,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:23,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920543615] [2020-10-12 16:15:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:23,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:23,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:23,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:24,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:24,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:24,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:15:24,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:15:24,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-12 16:15:24,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:15:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:15:24,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:25,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:25,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:25,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:25,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:25,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:25,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:25,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:25,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920543615] [2020-10-12 16:15:25,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:25,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:15:25,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916073472] [2020-10-12 16:15:25,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:15:25,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:25,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:15:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:15:25,991 INFO L87 Difference]: Start difference. First operand 641 states and 837 transitions. Second operand 24 states. [2020-10-12 16:15:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:26,818 INFO L93 Difference]: Finished difference Result 656 states and 851 transitions. [2020-10-12 16:15:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:15:26,819 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2020-10-12 16:15:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:26,822 INFO L225 Difference]: With dead ends: 656 [2020-10-12 16:15:26,822 INFO L226 Difference]: Without dead ends: 641 [2020-10-12 16:15:26,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:15:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-10-12 16:15:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2020-10-12 16:15:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-12 16:15:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 836 transitions. [2020-10-12 16:15:26,854 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 836 transitions. Word has length 36 [2020-10-12 16:15:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:26,854 INFO L479 AbstractCegarLoop]: Abstraction has 641 states and 836 transitions. [2020-10-12 16:15:26,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:15:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 836 transitions. [2020-10-12 16:15:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:15:26,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:26,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:26,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:15:26,856 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:26,856 INFO L82 PathProgramCache]: Analyzing trace with hash 340420320, now seen corresponding path program 11 times [2020-10-12 16:15:26,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:26,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371855427] [2020-10-12 16:15:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:26,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:27,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:27,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:27,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:27,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:27,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:15:27,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:15:27,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-12 16:15:27,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:27,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:15:27,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:27,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:15:27,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:29,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:29,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:29,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:29,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:29,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:29,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:29,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:29,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:29,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:29,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:29,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:29,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371855427] [2020-10-12 16:15:29,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:29,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:15:29,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6369620] [2020-10-12 16:15:29,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:15:29,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:29,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:15:29,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:15:29,134 INFO L87 Difference]: Start difference. First operand 641 states and 836 transitions. Second operand 24 states. [2020-10-12 16:15:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:30,288 INFO L93 Difference]: Finished difference Result 655 states and 849 transitions. [2020-10-12 16:15:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:15:30,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2020-10-12 16:15:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:30,293 INFO L225 Difference]: With dead ends: 655 [2020-10-12 16:15:30,293 INFO L226 Difference]: Without dead ends: 641 [2020-10-12 16:15:30,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:15:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-10-12 16:15:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2020-10-12 16:15:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-12 16:15:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 835 transitions. [2020-10-12 16:15:30,324 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 835 transitions. Word has length 36 [2020-10-12 16:15:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:30,324 INFO L479 AbstractCegarLoop]: Abstraction has 641 states and 835 transitions. [2020-10-12 16:15:30,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:15:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 835 transitions. [2020-10-12 16:15:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:15:30,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:30,325 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:30,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:15:30,325 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:30,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1435043584, now seen corresponding path program 7 times [2020-10-12 16:15:30,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:30,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421153797] [2020-10-12 16:15:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:30,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:30,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:30,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:30,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:15:30,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:30,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-12 16:15:30,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:15:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:15:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:15:30,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:30,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:30,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:30,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:30,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:30,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:30,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:30,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:30,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-12 16:15:30,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421153797] [2020-10-12 16:15:30,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:30,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:15:30,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960622272] [2020-10-12 16:15:30,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:15:30,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:30,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:15:30,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:15:30,769 INFO L87 Difference]: Start difference. First operand 641 states and 835 transitions. Second operand 8 states. [2020-10-12 16:15:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:31,985 INFO L93 Difference]: Finished difference Result 1122 states and 1497 transitions. [2020-10-12 16:15:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:15:31,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-12 16:15:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:31,990 INFO L225 Difference]: With dead ends: 1122 [2020-10-12 16:15:31,990 INFO L226 Difference]: Without dead ends: 1105 [2020-10-12 16:15:31,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:15:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2020-10-12 16:15:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 663. [2020-10-12 16:15:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2020-10-12 16:15:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 865 transitions. [2020-10-12 16:15:32,026 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 865 transitions. Word has length 36 [2020-10-12 16:15:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:32,026 INFO L479 AbstractCegarLoop]: Abstraction has 663 states and 865 transitions. [2020-10-12 16:15:32,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:15:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 865 transitions. [2020-10-12 16:15:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:15:32,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:32,027 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:32,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:15:32,028 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash -920560945, now seen corresponding path program 9 times [2020-10-12 16:15:32,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:32,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377834906] [2020-10-12 16:15:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:32,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:32,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:32,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:32,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:32,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:33,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:33,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:33,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:35,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:37,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:37,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:15:37,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:15:37,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:15:37,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:15:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:15:37,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:37,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:37,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:37,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:37,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:37,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:37,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:37,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:37,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:37,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:37,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:37,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:37,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377834906] [2020-10-12 16:15:37,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:37,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:15:37,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113079827] [2020-10-12 16:15:37,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:15:37,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:15:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:15:37,394 INFO L87 Difference]: Start difference. First operand 663 states and 865 transitions. Second operand 18 states. [2020-10-12 16:15:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:39,037 INFO L93 Difference]: Finished difference Result 763 states and 1016 transitions. [2020-10-12 16:15:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:15:39,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-12 16:15:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:39,040 INFO L225 Difference]: With dead ends: 763 [2020-10-12 16:15:39,040 INFO L226 Difference]: Without dead ends: 699 [2020-10-12 16:15:39,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:15:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-12 16:15:39,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 664. [2020-10-12 16:15:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-10-12 16:15:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 866 transitions. [2020-10-12 16:15:39,075 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 866 transitions. Word has length 36 [2020-10-12 16:15:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:39,075 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 866 transitions. [2020-10-12 16:15:39,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:15:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 866 transitions. [2020-10-12 16:15:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:15:39,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:39,076 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:39,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:15:39,076 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:39,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1494980703, now seen corresponding path program 14 times [2020-10-12 16:15:39,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:39,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741834372] [2020-10-12 16:15:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:39,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:39,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:39,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:39,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:40,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:41,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:41,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:15:41,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:15:41,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2612 [2020-10-12 16:15:41,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:41,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:15:41,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:41,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:15:41,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:42,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:42,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:42,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:42,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:42,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:42,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:42,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:42,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:42,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:15:42,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741834372] [2020-10-12 16:15:42,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:42,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:15:42,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694542911] [2020-10-12 16:15:42,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:15:42,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:42,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:15:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:15:42,185 INFO L87 Difference]: Start difference. First operand 664 states and 866 transitions. Second operand 22 states. [2020-10-12 16:15:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:43,946 INFO L93 Difference]: Finished difference Result 941 states and 1313 transitions. [2020-10-12 16:15:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:15:43,947 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-10-12 16:15:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:43,950 INFO L225 Difference]: With dead ends: 941 [2020-10-12 16:15:43,950 INFO L226 Difference]: Without dead ends: 857 [2020-10-12 16:15:43,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:15:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2020-10-12 16:15:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 697. [2020-10-12 16:15:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-12 16:15:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 912 transitions. [2020-10-12 16:15:43,987 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 912 transitions. Word has length 36 [2020-10-12 16:15:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:43,987 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 912 transitions. [2020-10-12 16:15:43,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:15:43,987 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 912 transitions. [2020-10-12 16:15:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:15:43,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:43,988 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:43,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:15:43,988 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash -539222313, now seen corresponding path program 10 times [2020-10-12 16:15:43,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:43,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430342339] [2020-10-12 16:15:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:44,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:44,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:44,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:45,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:47,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:47,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:15:47,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:15:47,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3143 [2020-10-12 16:15:47,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:15:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:47,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:15:47,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:48,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:48,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:48,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:48,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:48,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:48,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:48,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:48,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:48,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:48,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:48,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430342339] [2020-10-12 16:15:48,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:48,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:15:48,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318945394] [2020-10-12 16:15:48,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:15:48,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:48,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:15:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:15:48,478 INFO L87 Difference]: Start difference. First operand 697 states and 912 transitions. Second operand 22 states. [2020-10-12 16:15:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:50,863 INFO L93 Difference]: Finished difference Result 1279 states and 1786 transitions. [2020-10-12 16:15:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:15:50,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-10-12 16:15:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:50,868 INFO L225 Difference]: With dead ends: 1279 [2020-10-12 16:15:50,869 INFO L226 Difference]: Without dead ends: 1040 [2020-10-12 16:15:50,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:15:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2020-10-12 16:15:50,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 701. [2020-10-12 16:15:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-10-12 16:15:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 909 transitions. [2020-10-12 16:15:50,915 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 909 transitions. Word has length 37 [2020-10-12 16:15:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:50,916 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 909 transitions. [2020-10-12 16:15:50,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:15:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 909 transitions. [2020-10-12 16:15:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:15:50,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:50,917 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] [2020-10-12 16:15:50,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:15:50,917 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1072153793, now seen corresponding path program 12 times [2020-10-12 16:15:50,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:50,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602586734] [2020-10-12 16:15:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:50,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:51,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:15:51,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:15:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-12 16:15:51,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:15:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:15:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:54,605 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-10-12 16:15:57,327 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-10-12 16:15:57,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:57,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:57,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:57,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:57,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:57,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:57,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:57,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:57,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:57,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:57,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:57,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602586734] [2020-10-12 16:15:57,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:57,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:15:57,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136992867] [2020-10-12 16:15:57,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:15:57,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:57,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:15:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:15:57,598 INFO L87 Difference]: Start difference. First operand 701 states and 909 transitions. Second operand 25 states. [2020-10-12 16:16:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:05,076 INFO L93 Difference]: Finished difference Result 717 states and 924 transitions. [2020-10-12 16:16:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:16:05,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2020-10-12 16:16:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:05,080 INFO L225 Difference]: With dead ends: 717 [2020-10-12 16:16:05,080 INFO L226 Difference]: Without dead ends: 701 [2020-10-12 16:16:05,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:16:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-10-12 16:16:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 701. [2020-10-12 16:16:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-10-12 16:16:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 908 transitions. [2020-10-12 16:16:05,125 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 908 transitions. Word has length 38 [2020-10-12 16:16:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:05,125 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 908 transitions. [2020-10-12 16:16:05,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:16:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 908 transitions. [2020-10-12 16:16:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:16:05,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:05,126 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:05,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:16:05,126 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash 567946562, now seen corresponding path program 13 times [2020-10-12 16:16:05,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:05,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414672642] [2020-10-12 16:16:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:05,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:05,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:05,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:05,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:06,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:06,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:16:06,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:16:06,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-12 16:16:06,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:06,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:16:06,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:06,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:16:06,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:08,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:08,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:08,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:08,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:08,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:08,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:08,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:08,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:08,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:08,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:08,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:08,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414672642] [2020-10-12 16:16:08,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:08,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:16:08,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052321478] [2020-10-12 16:16:08,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:16:08,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:08,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:16:08,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:16:08,392 INFO L87 Difference]: Start difference. First operand 701 states and 908 transitions. Second operand 25 states. [2020-10-12 16:16:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:09,859 INFO L93 Difference]: Finished difference Result 748 states and 954 transitions. [2020-10-12 16:16:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:16:09,860 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2020-10-12 16:16:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:09,864 INFO L225 Difference]: With dead ends: 748 [2020-10-12 16:16:09,864 INFO L226 Difference]: Without dead ends: 733 [2020-10-12 16:16:09,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:16:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2020-10-12 16:16:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 697. [2020-10-12 16:16:09,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-12 16:16:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 903 transitions. [2020-10-12 16:16:09,910 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 903 transitions. Word has length 38 [2020-10-12 16:16:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:09,911 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 903 transitions. [2020-10-12 16:16:09,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:16:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 903 transitions. [2020-10-12 16:16:09,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:16:09,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:09,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:09,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:16:09,912 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:09,912 INFO L82 PathProgramCache]: Analyzing trace with hash -706471711, now seen corresponding path program 14 times [2020-10-12 16:16:09,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:09,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345809621] [2020-10-12 16:16:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:09,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:10,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:10,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:10,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:16:10,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:10,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-12 16:16:10,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:16:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:16:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:16:10,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:10,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:10,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:10,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:10,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:10,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:10,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:10,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:10,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 16:16:10,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345809621] [2020-10-12 16:16:10,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:10,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:16:10,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076847447] [2020-10-12 16:16:10,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:16:10,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:10,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:16:10,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:16:10,201 INFO L87 Difference]: Start difference. First operand 697 states and 903 transitions. Second operand 7 states. [2020-10-12 16:16:12,317 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-12 16:16:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:12,722 INFO L93 Difference]: Finished difference Result 1209 states and 1557 transitions. [2020-10-12 16:16:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:16:12,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-12 16:16:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:12,726 INFO L225 Difference]: With dead ends: 1209 [2020-10-12 16:16:12,726 INFO L226 Difference]: Without dead ends: 1195 [2020-10-12 16:16:12,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:16:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-10-12 16:16:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 697. [2020-10-12 16:16:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-12 16:16:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 902 transitions. [2020-10-12 16:16:12,776 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 902 transitions. Word has length 38 [2020-10-12 16:16:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:12,776 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 902 transitions. [2020-10-12 16:16:12,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:16:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 902 transitions. [2020-10-12 16:16:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:16:12,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:12,777 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:12,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:16:12,777 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:12,778 INFO L82 PathProgramCache]: Analyzing trace with hash 575753762, now seen corresponding path program 15 times [2020-10-12 16:16:12,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:12,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059162292] [2020-10-12 16:16:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:12,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:12,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:13,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:13,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:16:13,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:13,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-12 16:16:13,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:16:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:16:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:16:13,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:13,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:13,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:13,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:13,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:13,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:13,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:13,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:13,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 16:16:13,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059162292] [2020-10-12 16:16:13,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:13,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:16:13,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964159452] [2020-10-12 16:16:13,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:16:13,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:16:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:16:13,491 INFO L87 Difference]: Start difference. First operand 697 states and 902 transitions. Second operand 11 states. [2020-10-12 16:16:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:18,571 INFO L93 Difference]: Finished difference Result 1290 states and 1680 transitions. [2020-10-12 16:16:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:16:18,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-12 16:16:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:18,582 INFO L225 Difference]: With dead ends: 1290 [2020-10-12 16:16:18,582 INFO L226 Difference]: Without dead ends: 1256 [2020-10-12 16:16:18,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=63, Invalid=176, Unknown=1, NotChecked=0, Total=240 [2020-10-12 16:16:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2020-10-12 16:16:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 673. [2020-10-12 16:16:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2020-10-12 16:16:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 874 transitions. [2020-10-12 16:16:18,639 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 874 transitions. Word has length 38 [2020-10-12 16:16:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:18,639 INFO L479 AbstractCegarLoop]: Abstraction has 673 states and 874 transitions. [2020-10-12 16:16:18,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:16:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 874 transitions. [2020-10-12 16:16:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:16:18,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:18,640 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:18,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:16:18,640 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1602626609, now seen corresponding path program 11 times [2020-10-12 16:16:18,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:18,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644306456] [2020-10-12 16:16:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:18,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:18,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:18,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:19,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:19,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:23,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:23,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:16:23,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:16:23,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:16:23,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:23,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:16:23,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:16:23,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:24,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:24,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:24,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:24,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:24,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:24,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:24,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:24,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 16:16:24,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644306456] [2020-10-12 16:16:24,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:24,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:16:24,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836510944] [2020-10-12 16:16:24,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:16:24,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:24,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:16:24,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:16:24,044 INFO L87 Difference]: Start difference. First operand 673 states and 874 transitions. Second operand 18 states. [2020-10-12 16:16:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:29,365 INFO L93 Difference]: Finished difference Result 946 states and 1232 transitions. [2020-10-12 16:16:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-12 16:16:29,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-12 16:16:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:29,370 INFO L225 Difference]: With dead ends: 946 [2020-10-12 16:16:29,370 INFO L226 Difference]: Without dead ends: 863 [2020-10-12 16:16:29,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=289, Invalid=6353, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:16:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-10-12 16:16:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 637. [2020-10-12 16:16:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-12 16:16:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 834 transitions. [2020-10-12 16:16:29,419 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 834 transitions. Word has length 38 [2020-10-12 16:16:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:29,419 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 834 transitions. [2020-10-12 16:16:29,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:16:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 834 transitions. [2020-10-12 16:16:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:16:29,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:29,420 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:29,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:16:29,421 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2004893721, now seen corresponding path program 12 times [2020-10-12 16:16:29,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:29,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840125262] [2020-10-12 16:16:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:29,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:29,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:29,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:29,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:31,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:32,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:34,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:34,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:16:34,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:16:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 16:16:34,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:16:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:34,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:16:34,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:34,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:34,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:34,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:34,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:34,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:34,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:34,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:34,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:34,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:34,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:34,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:34,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840125262] [2020-10-12 16:16:34,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:34,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:16:34,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182201974] [2020-10-12 16:16:34,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:16:34,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:34,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:16:34,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:16:34,946 INFO L87 Difference]: Start difference. First operand 637 states and 834 transitions. Second operand 20 states.