/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:46:58,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:46:58,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:46:58,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:46:58,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:46:58,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:46:58,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:46:58,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:46:58,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:46:58,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:46:58,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:46:58,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:46:58,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:46:58,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:46:58,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:46:58,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:46:58,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:46:58,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:46:58,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:46:58,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:46:58,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:46:58,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:46:58,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:46:58,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:46:58,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:46:58,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:46:58,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:46:58,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:46:58,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:46:58,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:46:58,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:46:58,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:46:58,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:46:58,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:46:58,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:46:58,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:46:58,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:46:58,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:46:58,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:46:58,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:46:58,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:46:58,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:46:58,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:46:58,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:46:58,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:46:58,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:46:58,534 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:46:58,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:46:58,534 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:46:58,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:46:58,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:46:58,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:46:58,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:46:58,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:46:58,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:46:58,536 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:46:58,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:46:58,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:46:58,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:46:58,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:46:58,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:46:58,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:46:58,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:46:58,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:46:58,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:46:58,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:46:58,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:46:58,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:46:58,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:46:58,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:46:58,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:46:58,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:46:58,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:46:58,860 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:46:58,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:46:58,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:46:58,865 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:46:58,866 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-12 09:46:58,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/056c70238/37197655b61e4d56866ef98b122dc1bd/FLAG678bd9368 [2020-10-12 09:46:59,449 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:46:59,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-12 09:46:59,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/056c70238/37197655b61e4d56866ef98b122dc1bd/FLAG678bd9368 [2020-10-12 09:46:59,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/056c70238/37197655b61e4d56866ef98b122dc1bd [2020-10-12 09:46:59,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:46:59,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:46:59,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:46:59,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:46:59,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:46:59,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59, skipping insertion in model container [2020-10-12 09:46:59,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:46:59,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:47:00,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:47:00,076 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:47:00,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:47:00,127 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:47:00,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00 WrapperNode [2020-10-12 09:47:00,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:47:00,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:47:00,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:47:00,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:47:00,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (1/1) ... [2020-10-12 09:47:00,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (1/1) ... [2020-10-12 09:47:00,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (1/1) ... [2020-10-12 09:47:00,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (1/1) ... [2020-10-12 09:47:00,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (1/1) ... [2020-10-12 09:47:00,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (1/1) ... [2020-10-12 09:47:00,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (1/1) ... [2020-10-12 09:47:00,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:47:00,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:47:00,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:47:00,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:47:00,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:47:00,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:47:00,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:47:00,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:47:00,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:47:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:47:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:47:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:47:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:47:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:47:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:47:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:47:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:47:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:47:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:47:00,693 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:47:00,693 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-12 09:47:00,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:47:00 BoogieIcfgContainer [2020-10-12 09:47:00,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:47:00,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:47:00,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:47:00,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:47:00,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:46:59" (1/3) ... [2020-10-12 09:47:00,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c7d013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:47:00, skipping insertion in model container [2020-10-12 09:47:00,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:47:00" (2/3) ... [2020-10-12 09:47:00,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c7d013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:47:00, skipping insertion in model container [2020-10-12 09:47:00,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:47:00" (3/3) ... [2020-10-12 09:47:00,708 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2020-10-12 09:47:00,721 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:47:00,729 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:47:00,751 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:47:00,786 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:47:00,787 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:47:00,787 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:47:00,787 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:47:00,787 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:47:00,787 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:47:00,788 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:47:00,788 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:47:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-12 09:47:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 09:47:00,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:00,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:00,862 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2020-10-12 09:47:00,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:00,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324691713] [2020-10-12 09:47:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 09:47:01,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:01,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-12 09:47:01,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:47:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:47:01,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:01,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:01,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 09:47:01,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:01,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:01,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:01,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324691713] [2020-10-12 09:47:01,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:47:01,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 09:47:01,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723985472] [2020-10-12 09:47:01,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 09:47:01,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:01,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 09:47:01,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 09:47:01,255 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-12 09:47:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:01,416 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2020-10-12 09:47:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 09:47:01,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-12 09:47:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:01,430 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:47:01,430 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:47:01,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 09:47:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:47:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 09:47:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:47:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-12 09:47:01,485 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2020-10-12 09:47:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:01,485 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-12 09:47:01,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 09:47:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-12 09:47:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 09:47:01,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:01,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:01,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:47:01,488 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2020-10-12 09:47:01,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:01,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11496973] [2020-10-12 09:47:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 09:47:01,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:01,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-12 09:47:01,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:47:01,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:01,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:47:01,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:01,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:01,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:47:01,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:01,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:01,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11496973] [2020-10-12 09:47:01,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:47:01,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:47:01,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371508356] [2020-10-12 09:47:01,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:47:01,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:47:01,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:47:01,756 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2020-10-12 09:47:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:01,883 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-10-12 09:47:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:47:01,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 09:47:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:01,885 INFO L225 Difference]: With dead ends: 74 [2020-10-12 09:47:01,885 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 09:47:01,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:47:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 09:47:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-12 09:47:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:47:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-10-12 09:47:01,899 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2020-10-12 09:47:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:01,899 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-10-12 09:47:01,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:47:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-10-12 09:47:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 09:47:01,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:01,901 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 09:47:01,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:47:01,901 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2020-10-12 09:47:01,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:01,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009039422] [2020-10-12 09:47:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 09:47:02,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:02,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-12 09:47:02,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:47:02,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:02,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:47:02,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:02,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:02,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:02,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:47:02,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:02,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009039422] [2020-10-12 09:47:02,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:02,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:47:02,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586310467] [2020-10-12 09:47:02,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:47:02,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:02,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:47:02,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:47:02,231 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 5 states. [2020-10-12 09:47:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:02,357 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-10-12 09:47:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:47:02,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-12 09:47:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:02,359 INFO L225 Difference]: With dead ends: 76 [2020-10-12 09:47:02,360 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:47:02,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:47:02,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:47:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 09:47:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:47:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-12 09:47:02,370 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2020-10-12 09:47:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:02,370 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-12 09:47:02,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:47:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-12 09:47:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 09:47:02,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:02,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:02,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:47:02,373 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:02,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1951169084, now seen corresponding path program 2 times [2020-10-12 09:47:02,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:02,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935630092] [2020-10-12 09:47:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 09:47:02,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:02,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-12 09:47:02,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:47:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:47:02,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:47:02,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:02,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:02,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:47:02,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:02,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:02,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935630092] [2020-10-12 09:47:02,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:02,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:47:02,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500205808] [2020-10-12 09:47:02,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:47:02,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:47:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:47:02,647 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 6 states. [2020-10-12 09:47:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:02,792 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-10-12 09:47:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:47:02,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 09:47:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:02,795 INFO L225 Difference]: With dead ends: 78 [2020-10-12 09:47:02,795 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:47:02,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:47:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:47:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 09:47:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 09:47:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-10-12 09:47:02,811 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 20 [2020-10-12 09:47:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:02,812 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-10-12 09:47:02,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:47:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-10-12 09:47:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:47:02,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:02,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:02,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:47:02,815 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:02,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:02,816 INFO L82 PathProgramCache]: Analyzing trace with hash 457237158, now seen corresponding path program 3 times [2020-10-12 09:47:02,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:02,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582197804] [2020-10-12 09:47:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:47:03,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:03,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-12 09:47:03,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:47:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:47:03,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:03,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:03,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:03,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:03,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:47:03,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:03,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:03,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:03,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:03,177 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 09:47:03,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582197804] [2020-10-12 09:47:03,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:03,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:47:03,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439902250] [2020-10-12 09:47:03,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:47:03,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:47:03,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:47:03,181 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 7 states. [2020-10-12 09:47:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:03,351 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-10-12 09:47:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:47:03,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 09:47:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:03,353 INFO L225 Difference]: With dead ends: 80 [2020-10-12 09:47:03,353 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:47:03,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:47:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:47:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-12 09:47:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 09:47:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-12 09:47:03,366 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 22 [2020-10-12 09:47:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:03,367 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-12 09:47:03,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:47:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-12 09:47:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 09:47:03,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:03,369 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:03,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:47:03,369 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash -51736824, now seen corresponding path program 4 times [2020-10-12 09:47:03,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:03,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721045062] [2020-10-12 09:47:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 09:47:03,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:03,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-12 09:47:03,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:47:03,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:03,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:47:03,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:03,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:03,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:03,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:03,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:03,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:03,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721045062] [2020-10-12 09:47:03,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:03,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:47:03,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871714354] [2020-10-12 09:47:03,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:47:03,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:03,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:47:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:47:03,766 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 8 states. [2020-10-12 09:47:03,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:03,895 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-12 09:47:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:47:03,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-12 09:47:03,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:03,896 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:47:03,897 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 09:47:03,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:47:03,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 09:47:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-12 09:47:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 09:47:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-12 09:47:03,904 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 24 [2020-10-12 09:47:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:03,905 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-12 09:47:03,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:47:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-12 09:47:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:47:03,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:03,906 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:03,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:47:03,907 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 450538218, now seen corresponding path program 5 times [2020-10-12 09:47:03,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:03,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265902062] [2020-10-12 09:47:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:47:04,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:04,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-12 09:47:04,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:47:04,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:04,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:47:04,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:04,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:04,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:04,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:04,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:04,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:04,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:04,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:04,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265902062] [2020-10-12 09:47:04,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:04,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:47:04,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047149515] [2020-10-12 09:47:04,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:47:04,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:47:04,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:47:04,222 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 9 states. [2020-10-12 09:47:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:04,354 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-10-12 09:47:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:47:04,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-12 09:47:04,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:04,356 INFO L225 Difference]: With dead ends: 84 [2020-10-12 09:47:04,356 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 09:47:04,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:47:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 09:47:04,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-12 09:47:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:47:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-12 09:47:04,363 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 26 [2020-10-12 09:47:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:04,363 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-12 09:47:04,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:47:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-12 09:47:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:47:04,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:04,365 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:04,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:47:04,365 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2100516428, now seen corresponding path program 6 times [2020-10-12 09:47:04,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:04,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972757662] [2020-10-12 09:47:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:47:04,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:04,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-12 09:47:04,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:47:04,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:04,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:47:04,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:04,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:04,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:04,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:04,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:04,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:04,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972757662] [2020-10-12 09:47:04,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:04,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:47:04,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593672989] [2020-10-12 09:47:04,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:47:04,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:47:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:47:04,672 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 10 states. [2020-10-12 09:47:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:04,791 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-12 09:47:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:47:04,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 09:47:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:04,793 INFO L225 Difference]: With dead ends: 86 [2020-10-12 09:47:04,793 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:47:04,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:47:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:47:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-12 09:47:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 09:47:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-12 09:47:04,800 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 28 [2020-10-12 09:47:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:04,800 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-12 09:47:04,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:47:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-12 09:47:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:47:04,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:04,802 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:04,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:47:04,802 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:04,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1408323282, now seen corresponding path program 7 times [2020-10-12 09:47:04,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:04,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892399715] [2020-10-12 09:47:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:47:05,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:05,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-12 09:47:05,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:47:05,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:05,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:47:05,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:05,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:05,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:05,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:05,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:05,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:05,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:05,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892399715] [2020-10-12 09:47:05,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:05,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:47:05,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577463742] [2020-10-12 09:47:05,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:47:05,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:05,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:47:05,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:47:05,168 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 11 states. [2020-10-12 09:47:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:05,291 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-10-12 09:47:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:47:05,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 09:47:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:05,292 INFO L225 Difference]: With dead ends: 88 [2020-10-12 09:47:05,293 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:47:05,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:47:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:47:05,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-12 09:47:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:47:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-12 09:47:05,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2020-10-12 09:47:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:05,300 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-12 09:47:05,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:47:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-12 09:47:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:47:05,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:05,301 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:05,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:47:05,301 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:05,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:05,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1853957232, now seen corresponding path program 8 times [2020-10-12 09:47:05,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:05,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887970214] [2020-10-12 09:47:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:47:05,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:05,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-12 09:47:05,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:47:05,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:05,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:47:05,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:05,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:05,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:05,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:05,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:05,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:05,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887970214] [2020-10-12 09:47:05,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:05,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:47:05,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331152528] [2020-10-12 09:47:05,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:47:05,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:47:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:47:05,760 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 12 states. [2020-10-12 09:47:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:05,913 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-12 09:47:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:47:05,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 09:47:05,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:05,914 INFO L225 Difference]: With dead ends: 90 [2020-10-12 09:47:05,915 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:47:05,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:47:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:47:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-12 09:47:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:47:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-12 09:47:05,921 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 32 [2020-10-12 09:47:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:05,922 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-12 09:47:05,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:47:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-12 09:47:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:47:05,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:05,923 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:05,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:47:05,924 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash -611453582, now seen corresponding path program 9 times [2020-10-12 09:47:05,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:05,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128134516] [2020-10-12 09:47:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:06,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:47:06,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:06,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-12 09:47:06,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:47:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:06,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:47:06,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:06,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:06,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:06,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:06,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:06,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:06,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:06,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:06,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:06,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:06,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:06,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128134516] [2020-10-12 09:47:06,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:06,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:47:06,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089397809] [2020-10-12 09:47:06,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:47:06,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:47:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:47:06,606 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 13 states. [2020-10-12 09:47:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:06,720 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2020-10-12 09:47:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:47:06,721 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 09:47:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:06,722 INFO L225 Difference]: With dead ends: 92 [2020-10-12 09:47:06,722 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:47:06,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:47:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:47:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-12 09:47:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:47:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-12 09:47:06,728 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 34 [2020-10-12 09:47:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:06,729 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-12 09:47:06,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:47:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-12 09:47:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:47:06,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:06,730 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:06,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:47:06,730 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:06,731 INFO L82 PathProgramCache]: Analyzing trace with hash -566354220, now seen corresponding path program 10 times [2020-10-12 09:47:06,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:06,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481839128] [2020-10-12 09:47:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:06,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:47:07,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-12 09:47:07,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:47:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:47:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:07,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:07,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:07,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:07,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:07,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:07,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:07,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:07,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:07,443 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 09:47:07,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481839128] [2020-10-12 09:47:07,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:07,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:47:07,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303757997] [2020-10-12 09:47:07,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:47:07,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:07,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:47:07,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:47:07,445 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 14 states. [2020-10-12 09:47:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:07,582 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2020-10-12 09:47:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:47:07,582 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-12 09:47:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:07,583 INFO L225 Difference]: With dead ends: 94 [2020-10-12 09:47:07,583 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:47:07,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:47:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:47:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-12 09:47:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:47:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-10-12 09:47:07,590 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 36 [2020-10-12 09:47:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:07,590 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-10-12 09:47:07,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:47:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-10-12 09:47:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:47:07,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:07,591 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:07,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:47:07,592 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash -175540298, now seen corresponding path program 11 times [2020-10-12 09:47:07,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:07,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621252954] [2020-10-12 09:47:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:07,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:08,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:08,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:47:08,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:08,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-12 09:47:08,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:08,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:47:08,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:47:08,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:08,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:08,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:08,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:08,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:08,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:08,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:08,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:08,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:08,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621252954] [2020-10-12 09:47:08,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:08,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:47:08,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667921340] [2020-10-12 09:47:08,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:47:08,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:47:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:47:08,549 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 15 states. [2020-10-12 09:47:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:08,753 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-10-12 09:47:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:47:08,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-12 09:47:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:08,755 INFO L225 Difference]: With dead ends: 96 [2020-10-12 09:47:08,755 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:47:08,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:47:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:47:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-12 09:47:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:47:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-12 09:47:08,761 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 38 [2020-10-12 09:47:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:08,761 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-12 09:47:08,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:47:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-12 09:47:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:47:08,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:08,762 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:08,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:47:08,763 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1734483992, now seen corresponding path program 12 times [2020-10-12 09:47:08,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:08,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047193630] [2020-10-12 09:47:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:08,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:08,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:09,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 09:47:09,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:09,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 901 [2020-10-12 09:47:09,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:09,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:47:09,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:09,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:47:09,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:09,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:09,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:09,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:09,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:09,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:09,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:09,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:09,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047193630] [2020-10-12 09:47:09,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:09,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:47:09,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337978625] [2020-10-12 09:47:09,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:47:09,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:47:09,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:47:09,863 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 16 states. [2020-10-12 09:47:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:10,058 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-10-12 09:47:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:47:10,059 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-12 09:47:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:10,060 INFO L225 Difference]: With dead ends: 98 [2020-10-12 09:47:10,060 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 09:47:10,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:47:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 09:47:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-12 09:47:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 09:47:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-12 09:47:10,069 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 40 [2020-10-12 09:47:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:10,070 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-12 09:47:10,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:47:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-12 09:47:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:47:10,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:10,073 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:10,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:47:10,073 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:10,074 INFO L82 PathProgramCache]: Analyzing trace with hash -978176006, now seen corresponding path program 13 times [2020-10-12 09:47:10,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:10,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502352153] [2020-10-12 09:47:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:11,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:11,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:47:11,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:11,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 917 [2020-10-12 09:47:11,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:11,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:47:11,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:11,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:47:11,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:11,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:11,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:11,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:11,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:11,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:11,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:11,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:11,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:11,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502352153] [2020-10-12 09:47:11,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:11,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:47:11,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469734974] [2020-10-12 09:47:11,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:47:11,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:47:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:47:11,198 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 17 states. [2020-10-12 09:47:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:11,408 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-10-12 09:47:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:47:11,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-12 09:47:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:11,411 INFO L225 Difference]: With dead ends: 100 [2020-10-12 09:47:11,411 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 09:47:11,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:47:11,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 09:47:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-12 09:47:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:47:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-12 09:47:11,430 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 42 [2020-10-12 09:47:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:11,430 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-12 09:47:11,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:47:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-12 09:47:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:47:11,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:11,432 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:11,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:47:11,432 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash -799285412, now seen corresponding path program 14 times [2020-10-12 09:47:11,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:11,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943071312] [2020-10-12 09:47:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:11,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:11,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:12,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:12,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:47:12,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:12,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 963 [2020-10-12 09:47:12,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:12,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:47:12,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:12,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:47:12,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:12,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:12,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:12,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:12,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:12,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:12,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:12,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:12,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:12,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:12,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:12,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:12,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943071312] [2020-10-12 09:47:12,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:12,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:47:12,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838976278] [2020-10-12 09:47:12,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:47:12,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:47:12,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:47:12,612 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 18 states. [2020-10-12 09:47:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:12,785 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2020-10-12 09:47:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:47:12,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-12 09:47:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:12,786 INFO L225 Difference]: With dead ends: 102 [2020-10-12 09:47:12,787 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:47:12,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:47:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:47:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-12 09:47:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 09:47:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-10-12 09:47:12,793 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 44 [2020-10-12 09:47:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:12,794 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-10-12 09:47:12,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:47:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-10-12 09:47:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:47:12,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:12,795 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:12,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:47:12,796 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:12,796 INFO L82 PathProgramCache]: Analyzing trace with hash -684116418, now seen corresponding path program 15 times [2020-10-12 09:47:12,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:12,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778415644] [2020-10-12 09:47:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:12,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:13,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:13,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:47:13,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:13,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-12 09:47:13,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:13,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:47:13,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:13,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:47:13,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:13,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:13,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:13,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:13,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:13,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:13,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:13,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:13,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:13,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:13,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:13,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778415644] [2020-10-12 09:47:13,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:13,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:47:13,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299991510] [2020-10-12 09:47:13,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:47:13,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:13,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:47:13,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:47:13,972 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 19 states. [2020-10-12 09:47:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:14,153 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2020-10-12 09:47:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:47:14,154 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-12 09:47:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:14,155 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:47:14,155 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 09:47:14,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:47:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 09:47:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-12 09:47:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 09:47:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-12 09:47:14,161 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 46 [2020-10-12 09:47:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:14,162 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-12 09:47:14,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:47:14,162 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-12 09:47:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:47:14,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:14,163 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:14,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:47:14,163 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1675862880, now seen corresponding path program 16 times [2020-10-12 09:47:14,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:14,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505644013] [2020-10-12 09:47:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:14,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:15,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:15,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:47:15,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:15,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-12 09:47:15,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:15,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:47:15,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:15,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:47:15,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:15,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:15,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:15,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:15,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:15,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:15,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:15,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:15,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:15,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:15,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:15,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:15,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505644013] [2020-10-12 09:47:15,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:15,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:47:15,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105782747] [2020-10-12 09:47:15,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:47:15,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:47:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:47:15,498 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 20 states. [2020-10-12 09:47:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:15,645 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2020-10-12 09:47:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:47:15,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-12 09:47:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:15,646 INFO L225 Difference]: With dead ends: 106 [2020-10-12 09:47:15,647 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:47:15,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:47:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:47:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-12 09:47:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 09:47:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-12 09:47:15,654 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 48 [2020-10-12 09:47:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:15,655 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-12 09:47:15,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:47:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-12 09:47:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:47:15,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:15,656 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:15,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:47:15,656 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:15,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1261473150, now seen corresponding path program 17 times [2020-10-12 09:47:15,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:15,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134462954] [2020-10-12 09:47:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:15,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:16,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:47:16,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:16,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1210 [2020-10-12 09:47:16,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:16,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:47:16,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:47:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:17,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:17,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:17,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:17,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:17,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:17,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:17,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:17,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134462954] [2020-10-12 09:47:17,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:17,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:47:17,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012276945] [2020-10-12 09:47:17,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:47:17,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:47:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:47:17,117 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 21 states. [2020-10-12 09:47:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:17,240 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2020-10-12 09:47:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:47:17,241 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-12 09:47:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:17,242 INFO L225 Difference]: With dead ends: 108 [2020-10-12 09:47:17,242 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 09:47:17,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:47:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 09:47:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-12 09:47:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 09:47:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-12 09:47:17,249 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 50 [2020-10-12 09:47:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:17,250 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-12 09:47:17,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:47:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-12 09:47:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:47:17,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:17,250 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:17,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:47:17,251 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:17,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:17,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1830066148, now seen corresponding path program 18 times [2020-10-12 09:47:17,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:17,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198476500] [2020-10-12 09:47:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:17,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:17,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:18,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:18,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:47:18,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:18,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1193 [2020-10-12 09:47:18,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:47:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:47:18,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:18,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:18,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:18,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:18,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:18,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:18,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:18,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:18,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:18,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:18,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198476500] [2020-10-12 09:47:18,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:18,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:47:18,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103974202] [2020-10-12 09:47:18,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:47:18,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:47:18,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:47:18,797 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 22 states. [2020-10-12 09:47:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:18,985 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-10-12 09:47:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:47:18,985 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-12 09:47:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:18,986 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:47:18,986 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 09:47:18,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:47:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 09:47:18,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-12 09:47:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 09:47:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-12 09:47:18,992 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 52 [2020-10-12 09:47:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:18,992 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-12 09:47:18,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:47:18,993 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-12 09:47:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:47:18,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:18,993 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:18,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:47:18,996 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:18,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:18,996 INFO L82 PathProgramCache]: Analyzing trace with hash 681962694, now seen corresponding path program 19 times [2020-10-12 09:47:18,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:18,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461479854] [2020-10-12 09:47:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:19,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:19,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:20,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:20,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:47:20,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:20,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-10-12 09:47:20,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:20,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:47:20,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:20,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:47:20,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:20,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:20,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:20,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:20,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:20,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:20,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:20,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461479854] [2020-10-12 09:47:20,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:20,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:47:20,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623314074] [2020-10-12 09:47:20,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:47:20,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:20,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:47:20,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:47:20,551 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 23 states. [2020-10-12 09:47:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:20,700 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-10-12 09:47:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:47:20,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-12 09:47:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:20,702 INFO L225 Difference]: With dead ends: 112 [2020-10-12 09:47:20,702 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 09:47:20,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:47:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 09:47:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-12 09:47:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:47:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-10-12 09:47:20,709 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 54 [2020-10-12 09:47:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:20,709 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-10-12 09:47:20,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:47:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-10-12 09:47:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 09:47:20,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:20,710 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:20,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:47:20,710 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1161138472, now seen corresponding path program 20 times [2020-10-12 09:47:20,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:20,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386245660] [2020-10-12 09:47:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:20,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:20,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:22,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:22,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 09:47:22,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:22,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1411 [2020-10-12 09:47:22,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:22,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:47:22,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:22,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:47:22,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:22,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:22,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:22,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:22,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:22,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:22,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:22,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:22,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:22,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:22,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:22,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:22,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386245660] [2020-10-12 09:47:22,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:22,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:47:22,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132715263] [2020-10-12 09:47:22,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:47:22,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:22,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:47:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:47:22,443 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 24 states. [2020-10-12 09:47:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:22,659 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-10-12 09:47:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:47:22,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-12 09:47:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:22,662 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:47:22,663 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:47:22,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:47:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:47:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-12 09:47:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 09:47:22,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-10-12 09:47:22,670 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 56 [2020-10-12 09:47:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:22,671 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-10-12 09:47:22,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:47:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-10-12 09:47:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 09:47:22,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:22,672 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:22,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:47:22,672 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2087560458, now seen corresponding path program 21 times [2020-10-12 09:47:22,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:22,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835186693] [2020-10-12 09:47:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:22,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:22,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:23,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:23,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 09:47:23,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:23,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-12 09:47:23,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:23,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:47:23,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:23,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:47:23,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:24,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:24,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:24,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:24,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:24,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:24,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:24,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:24,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:24,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835186693] [2020-10-12 09:47:24,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:24,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:47:24,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444115357] [2020-10-12 09:47:24,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:47:24,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:47:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:47:24,244 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 25 states. [2020-10-12 09:47:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:24,440 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-12 09:47:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:47:24,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-12 09:47:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:24,441 INFO L225 Difference]: With dead ends: 116 [2020-10-12 09:47:24,442 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 09:47:24,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:47:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 09:47:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-12 09:47:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 09:47:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-10-12 09:47:24,447 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 58 [2020-10-12 09:47:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:24,447 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-10-12 09:47:24,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:47:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-10-12 09:47:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:47:24,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:24,448 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:24,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:47:24,448 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash -974108564, now seen corresponding path program 22 times [2020-10-12 09:47:24,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:24,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448481982] [2020-10-12 09:47:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:24,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:25,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:25,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:47:25,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:25,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1479 [2020-10-12 09:47:25,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:47:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:47:25,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:26,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:26,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:26,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:26,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:26,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:26,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:26,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:26,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:26,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:26,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:26,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:26,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448481982] [2020-10-12 09:47:26,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:26,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:47:26,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705653546] [2020-10-12 09:47:26,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:47:26,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:26,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:47:26,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:47:26,293 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 26 states. [2020-10-12 09:47:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:26,437 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-12 09:47:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:47:26,437 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-12 09:47:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:26,438 INFO L225 Difference]: With dead ends: 118 [2020-10-12 09:47:26,438 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 09:47:26,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:47:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 09:47:26,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-12 09:47:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 09:47:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-12 09:47:26,442 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 60 [2020-10-12 09:47:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:26,442 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-12 09:47:26,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:47:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-12 09:47:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:47:26,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:26,443 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:26,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:47:26,443 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1185440946, now seen corresponding path program 23 times [2020-10-12 09:47:26,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:26,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988007248] [2020-10-12 09:47:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:26,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:26,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:27,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:27,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:47:27,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:27,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1263 [2020-10-12 09:47:27,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:47:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:47:27,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:28,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:28,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:28,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:28,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:28,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:28,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:28,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988007248] [2020-10-12 09:47:28,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:28,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:47:28,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598344684] [2020-10-12 09:47:28,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:47:28,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:47:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:47:28,225 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 27 states. [2020-10-12 09:47:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:28,456 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2020-10-12 09:47:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:47:28,457 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-12 09:47:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:28,458 INFO L225 Difference]: With dead ends: 120 [2020-10-12 09:47:28,458 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:47:28,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:47:28,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:47:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-12 09:47:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 09:47:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-12 09:47:28,463 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 62 [2020-10-12 09:47:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:28,464 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-12 09:47:28,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:47:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-12 09:47:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 09:47:28,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:28,465 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:28,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:47:28,465 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:28,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1882570160, now seen corresponding path program 24 times [2020-10-12 09:47:28,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:28,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626448168] [2020-10-12 09:47:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:28,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:28,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:29,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:29,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 09:47:29,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:29,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-12 09:47:29,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:47:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:47:29,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:30,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:30,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:30,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:30,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:30,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:30,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:47:30,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:30,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:30,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626448168] [2020-10-12 09:47:30,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:30,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:47:30,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084812458] [2020-10-12 09:47:30,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:47:30,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:30,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:47:30,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:47:30,125 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 28 states. [2020-10-12 09:47:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:30,433 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2020-10-12 09:47:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:47:30,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-12 09:47:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:30,434 INFO L225 Difference]: With dead ends: 122 [2020-10-12 09:47:30,434 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 09:47:30,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:47:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 09:47:30,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-12 09:47:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 09:47:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-12 09:47:30,444 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 64 [2020-10-12 09:47:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:30,445 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-12 09:47:30,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:47:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-12 09:47:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 09:47:30,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:30,446 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:30,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:47:30,447 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash -401289326, now seen corresponding path program 25 times [2020-10-12 09:47:30,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:30,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670316886] [2020-10-12 09:47:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:30,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:31,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:31,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 09:47:31,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:31,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1402 [2020-10-12 09:47:31,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:31,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:47:31,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:31,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:47:31,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:32,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:32,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:32,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:32,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:32,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:32,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:32,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:32,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:32,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:32,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:32,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670316886] [2020-10-12 09:47:32,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:32,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:47:32,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933063657] [2020-10-12 09:47:32,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:47:32,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:32,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:47:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:47:32,322 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 29 states. [2020-10-12 09:47:32,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:32,575 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2020-10-12 09:47:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:47:32,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-12 09:47:32,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:32,576 INFO L225 Difference]: With dead ends: 124 [2020-10-12 09:47:32,577 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 09:47:32,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:47:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 09:47:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-12 09:47:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 09:47:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2020-10-12 09:47:32,584 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 66 [2020-10-12 09:47:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:32,585 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2020-10-12 09:47:32,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:47:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2020-10-12 09:47:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:47:32,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:32,586 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:32,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:47:32,587 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:32,587 INFO L82 PathProgramCache]: Analyzing trace with hash -461967116, now seen corresponding path program 26 times [2020-10-12 09:47:32,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:32,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652239215] [2020-10-12 09:47:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:32,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:34,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:34,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:47:34,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-12 09:47:34,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:47:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:34,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:47:34,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:34,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:34,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:34,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:34,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:34,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:34,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:34,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:34,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:34,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:34,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:34,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:34,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652239215] [2020-10-12 09:47:34,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:34,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:47:34,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534276283] [2020-10-12 09:47:34,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:47:34,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:47:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:47:34,753 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand 30 states. [2020-10-12 09:47:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:34,969 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-10-12 09:47:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:47:34,970 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-12 09:47:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:34,971 INFO L225 Difference]: With dead ends: 126 [2020-10-12 09:47:34,971 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 09:47:34,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:47:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 09:47:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-12 09:47:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 09:47:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-10-12 09:47:34,977 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 68 [2020-10-12 09:47:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:34,977 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-10-12 09:47:34,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:47:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-10-12 09:47:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:47:34,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:34,978 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:34,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:47:34,978 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:34,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1356218838, now seen corresponding path program 27 times [2020-10-12 09:47:34,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:34,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943952088] [2020-10-12 09:47:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:35,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:36,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:36,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 09:47:36,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:36,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1662 [2020-10-12 09:47:36,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:47:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:47:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:37,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:37,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:37,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:37,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:37,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:37,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:37,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:37,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:37,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:37,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943952088] [2020-10-12 09:47:37,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:37,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:47:37,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872344090] [2020-10-12 09:47:37,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:47:37,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:47:37,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:47:37,127 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 31 states. [2020-10-12 09:47:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:37,422 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2020-10-12 09:47:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:47:37,423 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-12 09:47:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:37,424 INFO L225 Difference]: With dead ends: 128 [2020-10-12 09:47:37,424 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:47:37,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:47:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:47:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-12 09:47:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 09:47:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-10-12 09:47:37,435 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 70 [2020-10-12 09:47:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:37,436 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-10-12 09:47:37,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:47:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-10-12 09:47:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 09:47:37,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:37,437 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:37,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:47:37,437 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash 581231160, now seen corresponding path program 28 times [2020-10-12 09:47:37,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:37,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794826777] [2020-10-12 09:47:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:37,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:39,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:39,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 09:47:39,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:39,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1572 [2020-10-12 09:47:39,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:39,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:47:39,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:39,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:47:39,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:39,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:39,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:39,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:39,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:39,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:39,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:39,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:39,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794826777] [2020-10-12 09:47:39,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:39,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:47:39,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203913739] [2020-10-12 09:47:39,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:47:39,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:47:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:47:39,607 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 32 states. [2020-10-12 09:47:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:39,830 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2020-10-12 09:47:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:47:39,830 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-12 09:47:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:39,831 INFO L225 Difference]: With dead ends: 130 [2020-10-12 09:47:39,831 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 09:47:39,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:47:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 09:47:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-12 09:47:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 09:47:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-12 09:47:39,837 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 72 [2020-10-12 09:47:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:39,837 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-12 09:47:39,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:47:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-12 09:47:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:47:39,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:39,838 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:39,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:47:39,839 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:39,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1152585190, now seen corresponding path program 29 times [2020-10-12 09:47:39,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:39,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439826829] [2020-10-12 09:47:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:39,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:41,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:41,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:47:41,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:41,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1720 [2020-10-12 09:47:41,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:41,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:47:41,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:41,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:47:41,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:42,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:42,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:42,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:42,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:42,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:42,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:42,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:42,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:42,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:42,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:42,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:42,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439826829] [2020-10-12 09:47:42,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:42,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:47:42,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575735387] [2020-10-12 09:47:42,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:47:42,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:42,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:47:42,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:47:42,107 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 33 states. [2020-10-12 09:47:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:42,301 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-12 09:47:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:47:42,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-12 09:47:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:42,303 INFO L225 Difference]: With dead ends: 132 [2020-10-12 09:47:42,303 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 09:47:42,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:47:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 09:47:42,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-12 09:47:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 09:47:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2020-10-12 09:47:42,309 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 74 [2020-10-12 09:47:42,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:42,309 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2020-10-12 09:47:42,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:47:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2020-10-12 09:47:42,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 09:47:42,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:42,311 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:42,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:47:42,311 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:42,311 INFO L82 PathProgramCache]: Analyzing trace with hash -902786692, now seen corresponding path program 30 times [2020-10-12 09:47:42,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:42,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549573779] [2020-10-12 09:47:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:42,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:42,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:44,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:44,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 09:47:44,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:44,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1886 [2020-10-12 09:47:44,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:44,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:47:44,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:44,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:47:44,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:44,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:44,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:44,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:44,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:44,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:44,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549573779] [2020-10-12 09:47:44,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:44,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:47:44,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130333592] [2020-10-12 09:47:44,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:47:44,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:47:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:47:44,810 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand 34 states. [2020-10-12 09:47:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:45,100 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-10-12 09:47:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:47:45,101 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-12 09:47:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:45,102 INFO L225 Difference]: With dead ends: 134 [2020-10-12 09:47:45,102 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 09:47:45,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:47:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 09:47:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-12 09:47:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 09:47:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-12 09:47:45,108 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 76 [2020-10-12 09:47:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:45,108 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-12 09:47:45,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:47:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-12 09:47:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 09:47:45,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:45,109 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:45,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:47:45,109 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1364598690, now seen corresponding path program 31 times [2020-10-12 09:47:45,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:45,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456753616] [2020-10-12 09:47:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:45,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:45,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:47,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:47,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 09:47:47,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:47,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2189 [2020-10-12 09:47:47,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:47:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:47:47,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:47,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:47,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:47,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:47,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:47,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:47,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:47,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:47,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:47,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456753616] [2020-10-12 09:47:47,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:47,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:47:47,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990583250] [2020-10-12 09:47:47,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:47:47,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:47:47,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:47:47,908 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 35 states. [2020-10-12 09:47:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:48,198 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2020-10-12 09:47:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:47:48,201 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-12 09:47:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:48,202 INFO L225 Difference]: With dead ends: 136 [2020-10-12 09:47:48,202 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:47:48,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:47:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:47:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-12 09:47:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:47:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-10-12 09:47:48,208 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 78 [2020-10-12 09:47:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:48,208 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-10-12 09:47:48,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:47:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-10-12 09:47:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 09:47:48,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:48,209 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:48,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:47:48,210 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1510670016, now seen corresponding path program 32 times [2020-10-12 09:47:48,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:48,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740249720] [2020-10-12 09:47:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:48,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:48,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:50,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:50,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 09:47:50,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:50,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2333 [2020-10-12 09:47:50,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:47:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:47:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:51,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:51,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:51,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:51,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:51,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:51,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:51,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:51,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:51,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:51,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:51,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:51,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740249720] [2020-10-12 09:47:51,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:51,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:47:51,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16338441] [2020-10-12 09:47:51,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:47:51,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:51,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:47:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:47:51,239 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 36 states. [2020-10-12 09:47:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:51,539 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2020-10-12 09:47:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:47:51,540 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-12 09:47:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:51,541 INFO L225 Difference]: With dead ends: 138 [2020-10-12 09:47:51,542 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 09:47:51,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:47:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 09:47:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-12 09:47:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 09:47:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2020-10-12 09:47:51,547 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 80 [2020-10-12 09:47:51,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:51,548 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2020-10-12 09:47:51,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:47:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2020-10-12 09:47:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 09:47:51,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:51,549 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:51,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:47:51,550 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:51,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1315042142, now seen corresponding path program 33 times [2020-10-12 09:47:51,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:51,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765518056] [2020-10-12 09:47:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:53,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:53,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 09:47:53,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:53,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2364 [2020-10-12 09:47:53,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:53,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:47:53,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:47:53,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:54,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:54,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:54,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:54,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:54,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:54,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:54,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:54,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:54,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:54,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:54,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:54,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765518056] [2020-10-12 09:47:54,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:54,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:47:54,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532271833] [2020-10-12 09:47:54,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:47:54,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:54,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:47:54,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:47:54,621 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 37 states. [2020-10-12 09:47:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:54,938 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2020-10-12 09:47:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:47:54,941 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-12 09:47:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:54,942 INFO L225 Difference]: With dead ends: 140 [2020-10-12 09:47:54,942 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 09:47:54,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:47:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 09:47:54,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-12 09:47:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 09:47:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-10-12 09:47:54,947 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 82 [2020-10-12 09:47:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:54,947 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-10-12 09:47:54,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:47:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-10-12 09:47:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 09:47:54,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:54,948 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:54,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:47:54,948 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1889872388, now seen corresponding path program 34 times [2020-10-12 09:47:54,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:54,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21091167] [2020-10-12 09:47:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:54,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:57,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:57,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 09:47:57,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:57,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2551 [2020-10-12 09:47:57,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:57,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:47:57,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:57,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:47:57,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:58,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:58,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:58,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:58,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:58,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:58,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:58,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:58,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:58,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:58,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:58,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:58,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21091167] [2020-10-12 09:47:58,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:58,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:47:58,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844325187] [2020-10-12 09:47:58,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:47:58,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:58,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:47:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:47:58,220 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 38 states. [2020-10-12 09:47:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:58,436 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2020-10-12 09:47:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:47:58,437 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-12 09:47:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:58,438 INFO L225 Difference]: With dead ends: 142 [2020-10-12 09:47:58,438 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 09:47:58,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:47:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 09:47:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-12 09:47:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 09:47:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2020-10-12 09:47:58,444 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 84 [2020-10-12 09:47:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:58,444 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2020-10-12 09:47:58,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:47:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2020-10-12 09:47:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 09:47:58,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:58,445 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:58,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:47:58,446 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1973782810, now seen corresponding path program 35 times [2020-10-12 09:47:58,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:58,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332704461] [2020-10-12 09:47:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:58,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:58,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:01,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:01,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 09:48:01,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:01,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3075 [2020-10-12 09:48:01,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:01,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:48:01,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:01,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 09:48:01,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:02,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:02,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:02,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:02,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:02,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:02,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:02,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:02,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332704461] [2020-10-12 09:48:02,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:02,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:48:02,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936093815] [2020-10-12 09:48:02,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:48:02,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:02,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:48:02,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:48:02,307 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 39 states. [2020-10-12 09:48:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:02,599 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2020-10-12 09:48:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:48:02,600 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-12 09:48:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:02,601 INFO L225 Difference]: With dead ends: 144 [2020-10-12 09:48:02,602 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 09:48:02,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:48:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 09:48:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-12 09:48:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 09:48:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2020-10-12 09:48:02,608 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 86 [2020-10-12 09:48:02,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:02,608 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2020-10-12 09:48:02,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:48:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2020-10-12 09:48:02,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 09:48:02,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:02,610 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:02,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:48:02,610 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:02,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash 200282952, now seen corresponding path program 36 times [2020-10-12 09:48:02,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:02,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810019010] [2020-10-12 09:48:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:02,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:05,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:05,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 09:48:05,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:05,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3079 [2020-10-12 09:48:05,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:48:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 09:48:05,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:06,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:06,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:06,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:06,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:06,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:06,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:06,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:06,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:06,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810019010] [2020-10-12 09:48:06,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:06,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:48:06,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673164003] [2020-10-12 09:48:06,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:48:06,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:06,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:48:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:48:06,554 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 40 states. [2020-10-12 09:48:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:06,900 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2020-10-12 09:48:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:48:06,901 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-12 09:48:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:06,902 INFO L225 Difference]: With dead ends: 146 [2020-10-12 09:48:06,902 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 09:48:06,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:48:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 09:48:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-12 09:48:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 09:48:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-10-12 09:48:06,907 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 88 [2020-10-12 09:48:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:06,908 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-10-12 09:48:06,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:48:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-10-12 09:48:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 09:48:06,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:06,909 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:06,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:48:06,909 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2123374378, now seen corresponding path program 37 times [2020-10-12 09:48:06,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:06,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292852747] [2020-10-12 09:48:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:06,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:06,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:10,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:10,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 09:48:10,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:10,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3118 [2020-10-12 09:48:10,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 09:48:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 09:48:10,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:10,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:10,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:10,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:10,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:10,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:10,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:10,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:10,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:10,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292852747] [2020-10-12 09:48:10,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:10,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 09:48:10,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825419361] [2020-10-12 09:48:10,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 09:48:10,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:10,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 09:48:10,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:48:10,923 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 41 states. [2020-10-12 09:48:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:11,251 INFO L93 Difference]: Finished difference Result 148 states and 170 transitions. [2020-10-12 09:48:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 09:48:11,252 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-12 09:48:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:11,254 INFO L225 Difference]: With dead ends: 148 [2020-10-12 09:48:11,254 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 09:48:11,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:48:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 09:48:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-12 09:48:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:48:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-10-12 09:48:11,259 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 90 [2020-10-12 09:48:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:11,259 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-10-12 09:48:11,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 09:48:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-10-12 09:48:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 09:48:11,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:11,260 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:11,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:48:11,260 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash -916669812, now seen corresponding path program 38 times [2020-10-12 09:48:11,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:11,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993284522] [2020-10-12 09:48:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:11,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:11,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:13,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:13,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 09:48:13,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:13,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2384 [2020-10-12 09:48:13,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 09:48:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 09:48:13,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:14,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:14,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:14,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:14,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:14,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:14,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:14,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:14,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993284522] [2020-10-12 09:48:14,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:14,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 09:48:14,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648718787] [2020-10-12 09:48:14,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 09:48:14,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 09:48:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:48:14,663 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 42 states. [2020-10-12 09:48:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:14,879 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-10-12 09:48:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 09:48:14,880 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-12 09:48:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:14,881 INFO L225 Difference]: With dead ends: 150 [2020-10-12 09:48:14,882 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:48:14,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:48:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:48:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-12 09:48:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 09:48:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2020-10-12 09:48:14,887 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 92 [2020-10-12 09:48:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:14,888 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2020-10-12 09:48:14,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 09:48:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2020-10-12 09:48:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 09:48:14,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:14,889 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:14,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:48:14,889 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1821375122, now seen corresponding path program 39 times [2020-10-12 09:48:14,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:14,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48297820] [2020-10-12 09:48:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:15,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:17,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:17,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 09:48:17,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:17,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2729 [2020-10-12 09:48:17,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:17,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 09:48:17,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:17,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 09:48:17,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:18,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:18,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:18,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:18,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:18,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:18,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:18,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:18,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:18,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:18,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:18,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:18,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48297820] [2020-10-12 09:48:18,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:18,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 09:48:18,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709154782] [2020-10-12 09:48:18,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 09:48:18,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 09:48:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:48:18,577 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 43 states. [2020-10-12 09:48:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:18,935 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2020-10-12 09:48:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 09:48:18,935 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-12 09:48:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:18,936 INFO L225 Difference]: With dead ends: 152 [2020-10-12 09:48:18,937 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 09:48:18,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:48:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 09:48:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-12 09:48:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 09:48:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2020-10-12 09:48:18,941 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 94 [2020-10-12 09:48:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:18,941 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2020-10-12 09:48:18,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 09:48:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2020-10-12 09:48:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 09:48:18,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:18,942 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:18,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 09:48:18,943 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash 635183056, now seen corresponding path program 40 times [2020-10-12 09:48:18,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:18,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661214374] [2020-10-12 09:48:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:18,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:19,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:21,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:21,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 09:48:21,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2758 [2020-10-12 09:48:21,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 09:48:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 09:48:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:22,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:22,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:22,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:22,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:22,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:22,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:22,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:22,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:22,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:22,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661214374] [2020-10-12 09:48:22,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:22,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 09:48:22,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055265713] [2020-10-12 09:48:22,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 09:48:22,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 09:48:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:48:22,703 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 44 states. [2020-10-12 09:48:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:23,039 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2020-10-12 09:48:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 09:48:23,040 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-12 09:48:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:23,041 INFO L225 Difference]: With dead ends: 154 [2020-10-12 09:48:23,044 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 09:48:23,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:48:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 09:48:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-12 09:48:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 09:48:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2020-10-12 09:48:23,055 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 96 [2020-10-12 09:48:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:23,056 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2020-10-12 09:48:23,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 09:48:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2020-10-12 09:48:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 09:48:23,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:23,057 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:23,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 09:48:23,057 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:23,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:23,060 INFO L82 PathProgramCache]: Analyzing trace with hash -844420686, now seen corresponding path program 41 times [2020-10-12 09:48:23,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:23,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955685866] [2020-10-12 09:48:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:23,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:23,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:26,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:26,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 09:48:26,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:26,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3034 [2020-10-12 09:48:26,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 09:48:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 09:48:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:27,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:27,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:27,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:27,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:27,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:27,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:48:27,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:27,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:27,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:27,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:27,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:27,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955685866] [2020-10-12 09:48:27,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:27,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 09:48:27,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072652463] [2020-10-12 09:48:27,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 09:48:27,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:27,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 09:48:27,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:48:27,131 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand 45 states. [2020-10-12 09:48:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:27,511 INFO L93 Difference]: Finished difference Result 156 states and 178 transitions. [2020-10-12 09:48:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 09:48:27,512 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-12 09:48:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:27,514 INFO L225 Difference]: With dead ends: 156 [2020-10-12 09:48:27,514 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 09:48:27,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:48:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 09:48:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-12 09:48:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 09:48:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2020-10-12 09:48:27,520 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 98 [2020-10-12 09:48:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:27,520 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2020-10-12 09:48:27,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 09:48:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2020-10-12 09:48:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 09:48:27,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:27,521 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:27,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 09:48:27,522 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1109441772, now seen corresponding path program 42 times [2020-10-12 09:48:27,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:27,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804758474] [2020-10-12 09:48:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:27,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:30,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:30,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 09:48:30,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:30,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3193 [2020-10-12 09:48:30,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:30,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 09:48:30,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:30,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 09:48:30,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:31,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:31,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:31,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:31,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:31,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:31,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:31,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:31,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:31,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804758474] [2020-10-12 09:48:31,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:31,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 09:48:31,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457615854] [2020-10-12 09:48:31,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 09:48:31,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:31,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 09:48:31,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:48:31,804 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 46 states. [2020-10-12 09:48:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:32,187 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-10-12 09:48:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 09:48:32,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-12 09:48:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:32,188 INFO L225 Difference]: With dead ends: 158 [2020-10-12 09:48:32,188 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 09:48:32,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:48:32,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 09:48:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-12 09:48:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 09:48:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-10-12 09:48:32,195 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 100 [2020-10-12 09:48:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:32,195 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-10-12 09:48:32,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 09:48:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-10-12 09:48:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 09:48:32,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:32,197 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:32,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 09:48:32,197 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1903332342, now seen corresponding path program 43 times [2020-10-12 09:48:32,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:32,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649199956] [2020-10-12 09:48:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:32,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:32,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:36,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:36,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 09:48:36,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:36,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4738 [2020-10-12 09:48:36,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:36,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 09:48:36,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 09:48:36,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:38,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:38,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:38,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:38,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:38,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:38,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:48:38,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:38,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:38,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649199956] [2020-10-12 09:48:38,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:38,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 09:48:38,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978059358] [2020-10-12 09:48:38,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 09:48:38,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 09:48:38,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:48:38,043 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 47 states. [2020-10-12 09:48:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:38,314 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2020-10-12 09:48:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 09:48:38,315 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-12 09:48:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:38,317 INFO L225 Difference]: With dead ends: 160 [2020-10-12 09:48:38,317 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 09:48:38,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:48:38,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 09:48:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-12 09:48:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 09:48:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2020-10-12 09:48:38,327 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 102 [2020-10-12 09:48:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:38,329 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2020-10-12 09:48:38,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 09:48:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2020-10-12 09:48:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 09:48:38,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:38,330 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:38,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 09:48:38,331 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1923668904, now seen corresponding path program 44 times [2020-10-12 09:48:38,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:38,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653250900] [2020-10-12 09:48:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:38,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:38,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:42,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:42,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 09:48:42,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:42,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3868 [2020-10-12 09:48:42,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:42,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 09:48:42,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:42,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 09:48:42,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:43,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:43,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:43,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:43,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:43,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:43,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:43,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:43,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:43,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653250900] [2020-10-12 09:48:43,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:43,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 09:48:43,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969831804] [2020-10-12 09:48:43,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 09:48:43,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:43,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 09:48:43,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:48:43,413 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 48 states. [2020-10-12 09:48:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:43,773 INFO L93 Difference]: Finished difference Result 162 states and 184 transitions. [2020-10-12 09:48:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 09:48:43,773 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-12 09:48:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:43,774 INFO L225 Difference]: With dead ends: 162 [2020-10-12 09:48:43,774 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 09:48:43,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:48:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 09:48:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-12 09:48:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 09:48:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2020-10-12 09:48:43,782 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 104 [2020-10-12 09:48:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:43,783 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2020-10-12 09:48:43,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 09:48:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2020-10-12 09:48:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 09:48:43,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:43,784 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:43,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 09:48:43,784 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1115106362, now seen corresponding path program 45 times [2020-10-12 09:48:43,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:43,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134945589] [2020-10-12 09:48:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:43,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:43,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:47,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:47,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 09:48:47,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:47,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3812 [2020-10-12 09:48:47,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 09:48:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 09:48:47,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:48,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:48,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:48,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:48,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:48,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:48,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:48:48,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:48,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:48,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:48,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:48,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:48,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134945589] [2020-10-12 09:48:48,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:48,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 09:48:48,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462677752] [2020-10-12 09:48:48,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 09:48:48,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 09:48:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:48:48,779 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand 49 states. [2020-10-12 09:48:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:49,166 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2020-10-12 09:48:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 09:48:49,167 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-12 09:48:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:49,168 INFO L225 Difference]: With dead ends: 164 [2020-10-12 09:48:49,168 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 09:48:49,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:48:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 09:48:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-12 09:48:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:48:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2020-10-12 09:48:49,175 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 106 [2020-10-12 09:48:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:49,176 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2020-10-12 09:48:49,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 09:48:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2020-10-12 09:48:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 09:48:49,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:49,177 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:49,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 09:48:49,177 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:49,178 INFO L82 PathProgramCache]: Analyzing trace with hash 800375708, now seen corresponding path program 46 times [2020-10-12 09:48:49,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:49,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277144419] [2020-10-12 09:48:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:49,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:49,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:53,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:53,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 09:48:53,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4101 [2020-10-12 09:48:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 09:48:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 09:48:53,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:54,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:54,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:54,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277144419] [2020-10-12 09:48:54,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:54,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 09:48:54,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759402658] [2020-10-12 09:48:54,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 09:48:54,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:54,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 09:48:54,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:48:54,588 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand 50 states. [2020-10-12 09:48:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:54,934 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2020-10-12 09:48:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 09:48:54,935 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-12 09:48:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:54,937 INFO L225 Difference]: With dead ends: 166 [2020-10-12 09:48:54,937 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 09:48:54,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:48:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 09:48:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-12 09:48:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 09:48:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2020-10-12 09:48:54,944 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 108 [2020-10-12 09:48:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:54,944 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2020-10-12 09:48:54,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 09:48:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2020-10-12 09:48:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 09:48:54,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:54,945 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:54,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 09:48:54,945 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1008072066, now seen corresponding path program 47 times [2020-10-12 09:48:54,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:54,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259038723] [2020-10-12 09:48:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:54,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:55,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:59,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:59,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 09:48:59,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4526 [2020-10-12 09:48:59,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 09:48:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 09:48:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:00,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:00,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:00,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:00,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:00,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:00,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:00,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:00,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259038723] [2020-10-12 09:49:00,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:00,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 09:49:00,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046317849] [2020-10-12 09:49:00,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 09:49:00,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:00,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 09:49:00,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:49:00,766 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand 51 states. [2020-10-12 09:49:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:01,158 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2020-10-12 09:49:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 09:49:01,159 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-12 09:49:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:01,160 INFO L225 Difference]: With dead ends: 168 [2020-10-12 09:49:01,160 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 09:49:01,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:49:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 09:49:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-12 09:49:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 09:49:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2020-10-12 09:49:01,165 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 110 [2020-10-12 09:49:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:01,165 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2020-10-12 09:49:01,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 09:49:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2020-10-12 09:49:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 09:49:01,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:01,166 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:01,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 09:49:01,167 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash 535372000, now seen corresponding path program 48 times [2020-10-12 09:49:01,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:01,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455386176] [2020-10-12 09:49:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:01,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:05,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:05,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 09:49:05,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4651 [2020-10-12 09:49:05,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 09:49:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 09:49:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:07,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:07,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:07,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:07,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:07,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:07,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:07,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455386176] [2020-10-12 09:49:07,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:07,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 09:49:07,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687885626] [2020-10-12 09:49:07,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 09:49:07,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 09:49:07,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:49:07,202 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand 52 states. [2020-10-12 09:49:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:07,643 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2020-10-12 09:49:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 09:49:07,643 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-12 09:49:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:07,645 INFO L225 Difference]: With dead ends: 170 [2020-10-12 09:49:07,645 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 09:49:07,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:49:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 09:49:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-12 09:49:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 09:49:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-10-12 09:49:07,650 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 112 [2020-10-12 09:49:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:07,651 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-10-12 09:49:07,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 09:49:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-10-12 09:49:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 09:49:07,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:07,652 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:07,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 09:49:07,652 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2021402306, now seen corresponding path program 49 times [2020-10-12 09:49:07,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:07,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926288808] [2020-10-12 09:49:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:07,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:07,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:12,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:12,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 09:49:12,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:12,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4859 [2020-10-12 09:49:12,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:12,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 09:49:12,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:12,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 09:49:12,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:13,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:13,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:13,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:13,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:13,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:13,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:13,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:13,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926288808] [2020-10-12 09:49:13,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:13,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 09:49:13,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116191750] [2020-10-12 09:49:13,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 09:49:13,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:13,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 09:49:13,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:49:13,985 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 53 states. [2020-10-12 09:49:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:14,422 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2020-10-12 09:49:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 09:49:14,422 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-12 09:49:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:14,424 INFO L225 Difference]: With dead ends: 172 [2020-10-12 09:49:14,424 INFO L226 Difference]: Without dead ends: 140 [2020-10-12 09:49:14,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:49:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-12 09:49:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-12 09:49:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 09:49:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2020-10-12 09:49:14,430 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 114 [2020-10-12 09:49:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:14,430 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2020-10-12 09:49:14,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 09:49:14,431 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2020-10-12 09:49:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 09:49:14,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:14,432 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:14,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 09:49:14,432 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:14,432 INFO L82 PathProgramCache]: Analyzing trace with hash -127583196, now seen corresponding path program 50 times [2020-10-12 09:49:14,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:14,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631014397] [2020-10-12 09:49:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:19,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:19,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 09:49:19,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:49:19,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 09:49:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 09:49:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:20,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:20,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:20,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:20,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:20,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:20,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:20,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:20,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631014397] [2020-10-12 09:49:20,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:20,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 09:49:20,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981811325] [2020-10-12 09:49:20,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 09:49:20,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 09:49:20,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:49:20,923 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 54 states. [2020-10-12 09:49:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:21,337 INFO L93 Difference]: Finished difference Result 174 states and 196 transitions. [2020-10-12 09:49:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 09:49:21,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-12 09:49:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:21,342 INFO L225 Difference]: With dead ends: 174 [2020-10-12 09:49:21,343 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 09:49:21,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:49:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 09:49:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-12 09:49:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 09:49:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-10-12 09:49:21,348 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 116 [2020-10-12 09:49:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:21,348 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-10-12 09:49:21,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 09:49:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-10-12 09:49:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 09:49:21,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:21,349 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:21,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 09:49:21,350 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash 576618758, now seen corresponding path program 51 times [2020-10-12 09:49:21,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:21,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124676506] [2020-10-12 09:49:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:21,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:21,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:26,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:26,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 09:49:26,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:26,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 09:49:26,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 09:49:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 09:49:26,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:27,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:27,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:27,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:27,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:27,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:27,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:27,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:27,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:27,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:27,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:27,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:27,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124676506] [2020-10-12 09:49:27,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:27,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 09:49:27,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110703843] [2020-10-12 09:49:27,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 09:49:27,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:27,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 09:49:27,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:49:27,900 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 55 states. [2020-10-12 09:49:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:28,367 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2020-10-12 09:49:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 09:49:28,368 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-12 09:49:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:28,369 INFO L225 Difference]: With dead ends: 176 [2020-10-12 09:49:28,370 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 09:49:28,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:49:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 09:49:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-12 09:49:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 09:49:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2020-10-12 09:49:28,374 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 118 [2020-10-12 09:49:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:28,375 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2020-10-12 09:49:28,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 09:49:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2020-10-12 09:49:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 09:49:28,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:28,376 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:28,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 09:49:28,376 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1290136216, now seen corresponding path program 52 times [2020-10-12 09:49:28,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:28,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069657377] [2020-10-12 09:49:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:33,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:33,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 09:49:33,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-12 09:49:33,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 09:49:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 09:49:33,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:35,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:35,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:35,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:35,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:35,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:49:35,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:35,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:35,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:35,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069657377] [2020-10-12 09:49:35,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:35,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 09:49:35,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160724878] [2020-10-12 09:49:35,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 09:49:35,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:35,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 09:49:35,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 09:49:35,105 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 56 states. [2020-10-12 09:49:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:35,585 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2020-10-12 09:49:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 09:49:35,585 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-12 09:49:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:35,586 INFO L225 Difference]: With dead ends: 178 [2020-10-12 09:49:35,586 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 09:49:35,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 09:49:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 09:49:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-12 09:49:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 09:49:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2020-10-12 09:49:35,591 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 120 [2020-10-12 09:49:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:35,591 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2020-10-12 09:49:35,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 09:49:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2020-10-12 09:49:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 09:49:35,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:35,593 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:35,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 09:49:35,593 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:35,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:35,593 INFO L82 PathProgramCache]: Analyzing trace with hash 54663498, now seen corresponding path program 53 times [2020-10-12 09:49:35,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:35,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161345165] [2020-10-12 09:49:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:35,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:40,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:40,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 09:49:40,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:40,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 09:49:40,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:40,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 09:49:40,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:40,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 09:49:40,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:42,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:42,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:42,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:42,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:42,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:42,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:42,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:42,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:42,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:42,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:42,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:42,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161345165] [2020-10-12 09:49:42,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:42,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 09:49:42,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714202869] [2020-10-12 09:49:42,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 09:49:42,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:42,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 09:49:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 09:49:42,325 INFO L87 Difference]: Start difference. First operand 145 states and 156 transitions. Second operand 57 states. [2020-10-12 09:49:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:42,773 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2020-10-12 09:49:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 09:49:42,774 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-12 09:49:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:42,775 INFO L225 Difference]: With dead ends: 180 [2020-10-12 09:49:42,775 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 09:49:42,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 09:49:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 09:49:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-12 09:49:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 09:49:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 158 transitions. [2020-10-12 09:49:42,783 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 158 transitions. Word has length 122 [2020-10-12 09:49:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:42,783 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 158 transitions. [2020-10-12 09:49:42,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 09:49:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 158 transitions. [2020-10-12 09:49:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 09:49:42,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:42,784 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:42,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 09:49:42,784 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash -377967444, now seen corresponding path program 54 times [2020-10-12 09:49:42,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:42,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045478220] [2020-10-12 09:49:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:42,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:42,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:47,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:47,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 09:49:47,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:47,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 09:49:47,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:47,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 09:49:47,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:47,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 09:49:47,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:49,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:49,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:49,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:49,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:49,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:49,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:49,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:49,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:49,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:49,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045478220] [2020-10-12 09:49:49,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:49,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 09:49:49,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863025625] [2020-10-12 09:49:49,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 09:49:49,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 09:49:49,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 09:49:49,527 INFO L87 Difference]: Start difference. First operand 147 states and 158 transitions. Second operand 58 states. [2020-10-12 09:49:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:49,989 INFO L93 Difference]: Finished difference Result 182 states and 204 transitions. [2020-10-12 09:49:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 09:49:49,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-12 09:49:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:49,991 INFO L225 Difference]: With dead ends: 182 [2020-10-12 09:49:49,991 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 09:49:49,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 09:49:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 09:49:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-12 09:49:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 09:49:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2020-10-12 09:49:49,997 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 124 [2020-10-12 09:49:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:49,998 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2020-10-12 09:49:49,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 09:49:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2020-10-12 09:49:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 09:49:49,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:49,999 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:49,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 09:49:49,999 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:50,000 INFO L82 PathProgramCache]: Analyzing trace with hash 475525006, now seen corresponding path program 55 times [2020-10-12 09:49:50,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:50,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650857070] [2020-10-12 09:49:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:50,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:52,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:55,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:55,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 09:49:55,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:55,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:49:55,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 09:49:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 09:49:55,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:56,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:56,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:56,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:56,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:56,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:56,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:56,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:56,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:56,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:56,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:56,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650857070] [2020-10-12 09:49:56,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:56,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 09:49:56,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770647647] [2020-10-12 09:49:56,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 09:49:56,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:56,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 09:49:56,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:49:56,795 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand 59 states. [2020-10-12 09:49:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:57,150 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2020-10-12 09:49:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 09:49:57,150 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-12 09:49:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:57,152 INFO L225 Difference]: With dead ends: 184 [2020-10-12 09:49:57,152 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 09:49:57,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:49:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 09:49:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-12 09:49:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 09:49:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2020-10-12 09:49:57,157 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 126 [2020-10-12 09:49:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:57,157 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2020-10-12 09:49:57,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 09:49:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2020-10-12 09:49:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 09:49:57,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:57,158 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:57,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 09:49:57,159 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash 343015920, now seen corresponding path program 56 times [2020-10-12 09:49:57,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:57,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235194482] [2020-10-12 09:49:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:59,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:02,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:02,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 09:50:02,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:02,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:50:02,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 09:50:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-12 09:50:02,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:04,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:04,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:04,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:04,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:04,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:04,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:04,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:04,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:04,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:04,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:04,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:04,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235194482] [2020-10-12 09:50:04,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:04,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 09:50:04,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227859882] [2020-10-12 09:50:04,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 09:50:04,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:04,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 09:50:04,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:50:04,085 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand 60 states. [2020-10-12 09:50:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:04,605 INFO L93 Difference]: Finished difference Result 186 states and 208 transitions. [2020-10-12 09:50:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 09:50:04,605 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 128 [2020-10-12 09:50:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:04,607 INFO L225 Difference]: With dead ends: 186 [2020-10-12 09:50:04,607 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 09:50:04,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:50:04,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 09:50:04,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-12 09:50:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 09:50:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2020-10-12 09:50:04,612 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 128 [2020-10-12 09:50:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:04,613 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2020-10-12 09:50:04,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 09:50:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2020-10-12 09:50:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 09:50:04,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:04,614 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:04,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 09:50:04,614 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:04,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1850803154, now seen corresponding path program 57 times [2020-10-12 09:50:04,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:04,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101375911] [2020-10-12 09:50:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:04,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:04,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:09,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:09,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 09:50:09,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 09:50:09,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 09:50:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 09:50:09,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:11,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:11,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:11,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:11,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:11,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:11,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:11,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:11,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:11,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101375911] [2020-10-12 09:50:11,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:11,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 09:50:11,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612899768] [2020-10-12 09:50:11,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 09:50:11,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 09:50:11,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 09:50:11,645 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand 61 states. [2020-10-12 09:50:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:12,162 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2020-10-12 09:50:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 09:50:12,162 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 130 [2020-10-12 09:50:12,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:12,163 INFO L225 Difference]: With dead ends: 188 [2020-10-12 09:50:12,163 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 09:50:12,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 09:50:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 09:50:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-12 09:50:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 09:50:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2020-10-12 09:50:12,168 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 130 [2020-10-12 09:50:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:12,169 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2020-10-12 09:50:12,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 09:50:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2020-10-12 09:50:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 09:50:12,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:12,170 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:12,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 09:50:12,170 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -864611020, now seen corresponding path program 58 times [2020-10-12 09:50:12,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:12,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765335777] [2020-10-12 09:50:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:12,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:12,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:17,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:17,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 09:50:17,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:17,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:50:17,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:17,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 09:50:17,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:17,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 09:50:17,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:19,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:19,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:19,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:19,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:19,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:19,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:19,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:19,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:19,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:19,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:19,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:19,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765335777] [2020-10-12 09:50:19,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:19,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 09:50:19,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532863592] [2020-10-12 09:50:19,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 09:50:19,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:19,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 09:50:19,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 09:50:19,272 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand 62 states. [2020-10-12 09:50:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:19,700 INFO L93 Difference]: Finished difference Result 190 states and 212 transitions. [2020-10-12 09:50:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 09:50:19,701 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 132 [2020-10-12 09:50:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:19,702 INFO L225 Difference]: With dead ends: 190 [2020-10-12 09:50:19,702 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 09:50:19,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 09:50:19,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 09:50:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-12 09:50:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 09:50:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2020-10-12 09:50:19,707 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 132 [2020-10-12 09:50:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:19,707 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2020-10-12 09:50:19,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 09:50:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2020-10-12 09:50:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 09:50:19,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:19,709 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:19,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 09:50:19,709 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:19,709 INFO L82 PathProgramCache]: Analyzing trace with hash 962483734, now seen corresponding path program 59 times [2020-10-12 09:50:19,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:19,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377675718] [2020-10-12 09:50:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:19,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:24,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:24,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 09:50:24,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:24,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 09:50:24,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 09:50:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 09:50:24,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:26,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:26,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:26,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:26,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:26,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:26,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:26,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:26,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:26,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377675718] [2020-10-12 09:50:26,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:26,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 09:50:26,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587053338] [2020-10-12 09:50:26,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 09:50:26,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:26,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 09:50:26,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 09:50:26,918 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand 63 states. [2020-10-12 09:50:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:27,417 INFO L93 Difference]: Finished difference Result 192 states and 214 transitions. [2020-10-12 09:50:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 09:50:27,417 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 134 [2020-10-12 09:50:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:27,419 INFO L225 Difference]: With dead ends: 192 [2020-10-12 09:50:27,419 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 09:50:27,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 09:50:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 09:50:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-12 09:50:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 09:50:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2020-10-12 09:50:27,424 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 134 [2020-10-12 09:50:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:27,425 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2020-10-12 09:50:27,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 09:50:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2020-10-12 09:50:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 09:50:27,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:27,426 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:27,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 09:50:27,427 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash 158918264, now seen corresponding path program 60 times [2020-10-12 09:50:27,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:27,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244130319] [2020-10-12 09:50:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:27,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:27,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:32,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:32,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 09:50:32,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:32,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-12 09:50:32,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:32,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 09:50:32,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:32,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-12 09:50:32,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:34,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:34,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:34,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:34,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:34,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:34,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:34,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:34,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244130319] [2020-10-12 09:50:34,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:34,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 09:50:34,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321126289] [2020-10-12 09:50:34,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 09:50:34,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:34,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 09:50:34,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 09:50:34,693 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand 64 states. [2020-10-12 09:50:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:35,147 INFO L93 Difference]: Finished difference Result 194 states and 216 transitions. [2020-10-12 09:50:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 09:50:35,147 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 136 [2020-10-12 09:50:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:35,149 INFO L225 Difference]: With dead ends: 194 [2020-10-12 09:50:35,149 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 09:50:35,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 09:50:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 09:50:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-12 09:50:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 09:50:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 172 transitions. [2020-10-12 09:50:35,156 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 172 transitions. Word has length 136 [2020-10-12 09:50:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:35,156 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 172 transitions. [2020-10-12 09:50:35,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 09:50:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 172 transitions. [2020-10-12 09:50:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 09:50:35,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:35,157 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:35,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 09:50:35,158 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1026614874, now seen corresponding path program 61 times [2020-10-12 09:50:35,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:35,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790623512] [2020-10-12 09:50:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:35,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:35,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:40,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:40,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 09:50:40,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:50:40,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:40,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 09:50:40,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:40,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 09:50:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:42,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:42,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:42,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:42,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:42,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:42,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:42,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:42,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:42,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:42,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:42,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:42,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790623512] [2020-10-12 09:50:42,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:42,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 09:50:42,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83369016] [2020-10-12 09:50:42,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 09:50:42,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:42,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 09:50:42,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 09:50:42,470 INFO L87 Difference]: Start difference. First operand 161 states and 172 transitions. Second operand 65 states. [2020-10-12 09:50:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:43,009 INFO L93 Difference]: Finished difference Result 196 states and 218 transitions. [2020-10-12 09:50:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 09:50:43,009 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 138 [2020-10-12 09:50:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:43,011 INFO L225 Difference]: With dead ends: 196 [2020-10-12 09:50:43,011 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 09:50:43,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 09:50:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 09:50:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-12 09:50:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 09:50:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2020-10-12 09:50:43,015 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 138 [2020-10-12 09:50:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:43,015 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2020-10-12 09:50:43,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 09:50:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2020-10-12 09:50:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 09:50:43,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:43,016 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:43,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 09:50:43,016 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1659401660, now seen corresponding path program 62 times [2020-10-12 09:50:43,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:43,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563844996] [2020-10-12 09:50:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:43,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:43,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:48,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:48,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 09:50:48,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:48,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-12 09:50:48,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:48,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 09:50:48,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:48,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-12 09:50:48,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:50,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:50,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:50,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:50,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:50,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:50,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:50,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:50,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:50,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:50,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:50,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563844996] [2020-10-12 09:50:50,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:50,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 09:50:50,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074612109] [2020-10-12 09:50:50,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 09:50:50,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:50,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 09:50:50,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 09:50:50,445 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand 66 states. [2020-10-12 09:50:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:51,003 INFO L93 Difference]: Finished difference Result 198 states and 220 transitions. [2020-10-12 09:50:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 09:50:51,004 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 140 [2020-10-12 09:50:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:51,005 INFO L225 Difference]: With dead ends: 198 [2020-10-12 09:50:51,005 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 09:50:51,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 09:50:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 09:50:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-12 09:50:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 09:50:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2020-10-12 09:50:51,013 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 140 [2020-10-12 09:50:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:51,013 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2020-10-12 09:50:51,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 09:50:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2020-10-12 09:50:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 09:50:51,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:51,015 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:51,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 09:50:51,015 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:51,015 INFO L82 PathProgramCache]: Analyzing trace with hash -117853026, now seen corresponding path program 63 times [2020-10-12 09:50:51,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:51,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858002295] [2020-10-12 09:50:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:51,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:51,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:56,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:56,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 09:50:56,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:56,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:50:56,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 09:50:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-12 09:50:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0