/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:36:50,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:36:50,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:36:50,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:36:50,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:36:50,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:36:50,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:36:50,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:36:50,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:36:50,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:36:50,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:36:50,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:36:50,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:36:50,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:36:50,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:36:50,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:36:50,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:36:50,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:36:50,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:36:50,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:36:50,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:36:50,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:36:50,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:36:50,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:36:50,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:36:50,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:36:50,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:36:50,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:36:50,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:36:50,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:36:50,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:36:50,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:36:50,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:36:50,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:36:50,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:36:50,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:36:50,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:36:50,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:36:50,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:36:50,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:36:50,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:36:50,747 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 [2020-10-27 01:36:50,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:36:50,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:36:50,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:36:50,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:36:50,802 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:36:50,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:36:50,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:36:50,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:36:50,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:36:50,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:36:50,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:36:50,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:36:50,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:36:50,805 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:36:50,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:36:50,805 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:36:50,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:36:50,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:36:50,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:36:50,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:36:50,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:36:50,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:36:50,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:36:50,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:36:50,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:36:50,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:36:50,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:36:50,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:36:50,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:36:50,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:36:51,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:36:51,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:36:51,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:36:51,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:36:51,255 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:36:51,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2020-10-27 01:36:51,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adcf2addd/ddad0c46e19347388a8adc45097f01cf/FLAGffdd221de [2020-10-27 01:36:52,005 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:36:52,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2020-10-27 01:36:52,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adcf2addd/ddad0c46e19347388a8adc45097f01cf/FLAGffdd221de [2020-10-27 01:36:52,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adcf2addd/ddad0c46e19347388a8adc45097f01cf [2020-10-27 01:36:52,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:36:52,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:36:52,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:36:52,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:36:52,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:36:52,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b670a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52, skipping insertion in model container [2020-10-27 01:36:52,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:36:52,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:36:52,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:36:52,606 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:36:52,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:36:52,642 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:36:52,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52 WrapperNode [2020-10-27 01:36:52,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:36:52,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:36:52,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:36:52,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:36:52,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (1/1) ... [2020-10-27 01:36:52,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:36:52,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:36:52,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:36:52,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:36:52,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (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 [2020-10-27 01:36:52,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:36:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:36:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:36:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:36:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:36:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:36:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:36:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:36:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:36:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:36:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:36:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:36:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:36:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:36:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:36:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:36:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:36:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:36:53,361 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:36:53,362 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:36:53,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:36:53 BoogieIcfgContainer [2020-10-27 01:36:53,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:36:53,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:36:53,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:36:53,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:36:53,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:36:52" (1/3) ... [2020-10-27 01:36:53,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb22359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:36:53, skipping insertion in model container [2020-10-27 01:36:53,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:36:52" (2/3) ... [2020-10-27 01:36:53,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb22359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:36:53, skipping insertion in model container [2020-10-27 01:36:53,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:36:53" (3/3) ... [2020-10-27 01:36:53,378 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2020-10-27 01:36:53,392 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:36:53,398 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:36:53,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:36:53,463 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:36:53,463 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:36:53,463 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:36:53,464 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:36:53,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:36:53,464 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:36:53,464 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:36:53,464 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:36:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-27 01:36:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:36:53,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:53,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:53,502 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:53,510 INFO L82 PathProgramCache]: Analyzing trace with hash -758433903, now seen corresponding path program 1 times [2020-10-27 01:36:53,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:53,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615914084] [2020-10-27 01:36:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:53,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:53,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:53,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:54,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:54,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:54,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:36:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:36:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-27 01:36:54,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:54,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:36:54,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:36:54,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:36:54,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:36:54,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:54,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:54,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:54,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:54,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:36:54,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:54,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:36:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:54,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615914084] [2020-10-27 01:36:54,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:36:54,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:36:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689662746] [2020-10-27 01:36:54,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:36:54,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:54,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:36:54,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:36:54,370 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2020-10-27 01:36:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:54,605 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2020-10-27 01:36:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:36:54,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:36:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:54,616 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:36:54,616 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:36:54,620 INFO L677 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 [2020-10-27 01:36:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:36:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 01:36:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:36:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-10-27 01:36:54,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-10-27 01:36:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:54,666 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-10-27 01:36:54,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:36:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-10-27 01:36:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:36:54,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:54,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:54,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:36:54,668 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1073831761, now seen corresponding path program 1 times [2020-10-27 01:36:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:54,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423320400] [2020-10-27 01:36:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:54,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:54,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:54,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:36:54,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:54,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 01:36:54,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:36:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:36:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:36:54,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:54,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:54,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:54,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:54,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:36:54,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:54,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:54,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:54,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:54,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423320400] [2020-10-27 01:36:54,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:36:54,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:36:54,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670089180] [2020-10-27 01:36:54,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:36:54,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:54,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:36:54,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:36:54,845 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 4 states. [2020-10-27 01:36:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:54,962 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-10-27 01:36:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:36:54,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:36:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:54,964 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:36:54,965 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:36:54,966 INFO L677 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 [2020-10-27 01:36:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:36:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-10-27 01:36:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:36:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-27 01:36:54,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2020-10-27 01:36:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:54,975 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-27 01:36:54,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:36:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-27 01:36:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:36:54,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:54,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:54,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:36:54,977 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:54,978 INFO L82 PathProgramCache]: Analyzing trace with hash 278686385, now seen corresponding path program 1 times [2020-10-27 01:36:54,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:54,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577388383] [2020-10-27 01:36:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:55,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:55,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:55,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:55,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:55,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:55,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:36:55,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:36:55,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-27 01:36:55,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:36:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:36:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:36:55,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:55,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:55,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:55,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:55,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:55,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:36:55,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:55,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:36:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:55,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577388383] [2020-10-27 01:36:55,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:55,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:36:55,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778567571] [2020-10-27 01:36:55,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:36:55,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:36:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:36:55,871 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-27 01:36:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:56,330 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2020-10-27 01:36:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:36:56,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:36:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:56,333 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:36:56,333 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:36:56,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:36:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:36:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2020-10-27 01:36:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:36:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-10-27 01:36:56,346 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 18 [2020-10-27 01:36:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:56,347 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-10-27 01:36:56,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:36:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-10-27 01:36:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:36:56,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:56,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:56,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:36:56,348 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2110952049, now seen corresponding path program 1 times [2020-10-27 01:36:56,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:56,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602670872] [2020-10-27 01:36:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:56,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:56,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:56,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:56,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:36:56,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:36:56,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-27 01:36:56,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:36:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:36:56,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:36:56,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:56,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:56,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:56,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:56,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:56,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:56,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:36:56,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:56,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:56,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602670872] [2020-10-27 01:36:56,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:36:56,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 01:36:56,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7590122] [2020-10-27 01:36:56,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:36:56,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:56,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:36:56,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:36:56,906 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 9 states. [2020-10-27 01:36:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:57,227 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2020-10-27 01:36:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:36:57,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-27 01:36:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:57,229 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:36:57,229 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:36:57,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:36:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:36:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-27 01:36:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:36:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-27 01:36:57,241 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 18 [2020-10-27 01:36:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:57,242 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-27 01:36:57,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:36:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-27 01:36:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:36:57,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:57,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:57,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:36:57,243 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1452347245, now seen corresponding path program 1 times [2020-10-27 01:36:57,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:57,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181274167] [2020-10-27 01:36:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:57,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:57,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:57,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:57,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:57,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:57,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:57,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:36:57,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:36:57,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-27 01:36:57,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:36:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:36:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:36:57,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:57,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:57,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:57,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:57,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:57,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:57,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:36:57,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:57,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:57,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:57,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:57,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:57,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181274167] [2020-10-27 01:36:57,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:57,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:36:57,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884065115] [2020-10-27 01:36:57,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:36:57,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:57,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:36:57,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:36:57,898 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 7 states. [2020-10-27 01:36:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:58,333 INFO L93 Difference]: Finished difference Result 171 states and 227 transitions. [2020-10-27 01:36:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:36:58,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:36:58,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:58,335 INFO L225 Difference]: With dead ends: 171 [2020-10-27 01:36:58,335 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:36:58,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:36:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:36:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2020-10-27 01:36:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:36:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-10-27 01:36:58,349 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 21 [2020-10-27 01:36:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:58,349 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-10-27 01:36:58,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:36:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-10-27 01:36:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:36:58,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:58,350 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:58,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:36:58,351 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:58,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1002895503, now seen corresponding path program 2 times [2020-10-27 01:36:58,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:58,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580253936] [2020-10-27 01:36:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:58,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:58,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:58,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:58,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:58,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:36:58,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:36:58,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 01:36:58,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:36:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:36:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:36:58,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:58,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:36:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:58,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:58,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:36:58,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:36:58,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:36:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:36:58,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:36:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:36:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:36:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:36:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:36:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:36:58,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580253936] [2020-10-27 01:36:58,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:36:58,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:36:58,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685211706] [2020-10-27 01:36:58,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:36:58,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:36:58,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:36:58,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:36:58,950 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-10-27 01:36:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:36:59,116 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2020-10-27 01:36:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:36:59,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 01:36:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:36:59,119 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:36:59,119 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:36:59,120 INFO L677 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 [2020-10-27 01:36:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:36:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-27 01:36:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:36:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2020-10-27 01:36:59,135 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 24 [2020-10-27 01:36:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:36:59,136 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2020-10-27 01:36:59,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:36:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2020-10-27 01:36:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:36:59,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:36:59,137 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:36:59,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:36:59,138 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:36:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:36:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1787694801, now seen corresponding path program 3 times [2020-10-27 01:36:59,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:36:59,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928122485] [2020-10-27 01:36:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:36:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:36:59,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:36:59,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:00,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:00,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:00,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:01,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:01,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:37:01,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 01:37:01,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2156 [2020-10-27 01:37:01,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:01,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:37:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:37:01,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:01,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:01,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:01,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:01,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:01,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:37:01,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:01,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:01,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:01,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:01,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:01,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928122485] [2020-10-27 01:37:01,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:01,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:37:01,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106428803] [2020-10-27 01:37:01,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:37:01,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:37:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:37:01,494 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand 9 states. [2020-10-27 01:37:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:02,115 INFO L93 Difference]: Finished difference Result 222 states and 286 transitions. [2020-10-27 01:37:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:37:02,117 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:37:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:02,118 INFO L225 Difference]: With dead ends: 222 [2020-10-27 01:37:02,118 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:37:02,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:37:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:37:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2020-10-27 01:37:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 01:37:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2020-10-27 01:37:02,154 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 27 [2020-10-27 01:37:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:02,155 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2020-10-27 01:37:02,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:37:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2020-10-27 01:37:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:37:02,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:02,156 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:02,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:37:02,156 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:02,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1251374413, now seen corresponding path program 1 times [2020-10-27 01:37:02,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:02,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875390312] [2020-10-27 01:37:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:02,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:02,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:02,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:02,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:02,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:02,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:02,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:37:02,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:02,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-27 01:37:02,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:02,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:37:02,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:37:02,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:02,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:02,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:02,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:02,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:02,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:02,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:02,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:02,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:02,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875390312] [2020-10-27 01:37:02,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:02,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:37:02,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020998413] [2020-10-27 01:37:02,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:37:02,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:02,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:37:02,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:37:02,788 INFO L87 Difference]: Start difference. First operand 111 states and 142 transitions. Second operand 10 states. [2020-10-27 01:37:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:03,156 INFO L93 Difference]: Finished difference Result 307 states and 402 transitions. [2020-10-27 01:37:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:37:03,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:37:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:03,158 INFO L225 Difference]: With dead ends: 307 [2020-10-27 01:37:03,158 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 01:37:03,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:37:03,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 01:37:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 93. [2020-10-27 01:37:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:37:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2020-10-27 01:37:03,170 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 30 [2020-10-27 01:37:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:03,171 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2020-10-27 01:37:03,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:37:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2020-10-27 01:37:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:37:03,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:03,172 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:03,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:37:03,172 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:03,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1162366357, now seen corresponding path program 2 times [2020-10-27 01:37:03,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:03,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729229638] [2020-10-27 01:37:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:03,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:03,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:03,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:03,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:03,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:03,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:37:03,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:03,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-27 01:37:03,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:03,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:37:03,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:03,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:37:03,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:03,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:03,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:03,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:03,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:03,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:03,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:03,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:03,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:03,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729229638] [2020-10-27 01:37:03,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:03,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:37:03,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974442605] [2020-10-27 01:37:03,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:37:03,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:03,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:37:03,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:37:03,869 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand 11 states. [2020-10-27 01:37:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:04,520 INFO L93 Difference]: Finished difference Result 281 states and 359 transitions. [2020-10-27 01:37:04,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:37:04,521 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:37:04,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:04,522 INFO L225 Difference]: With dead ends: 281 [2020-10-27 01:37:04,522 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:37:04,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:37:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:37:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 133. [2020-10-27 01:37:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:37:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 170 transitions. [2020-10-27 01:37:04,537 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 170 transitions. Word has length 33 [2020-10-27 01:37:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:04,537 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 170 transitions. [2020-10-27 01:37:04,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:37:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 170 transitions. [2020-10-27 01:37:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:37:04,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:04,539 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:04,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:37:04,539 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1723791501, now seen corresponding path program 3 times [2020-10-27 01:37:04,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:04,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768040700] [2020-10-27 01:37:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:04,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:04,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:04,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:04,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:05,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:37:05,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:05,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-27 01:37:05,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:05,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:37:05,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:05,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:37:05,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:05,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:05,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:05,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:05,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:05,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:05,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:05,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768040700] [2020-10-27 01:37:05,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:05,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:37:05,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208239318] [2020-10-27 01:37:05,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:37:05,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:05,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:37:05,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:37:05,185 INFO L87 Difference]: Start difference. First operand 133 states and 170 transitions. Second operand 11 states. [2020-10-27 01:37:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:05,344 INFO L93 Difference]: Finished difference Result 306 states and 406 transitions. [2020-10-27 01:37:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:37:05,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 01:37:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:05,346 INFO L225 Difference]: With dead ends: 306 [2020-10-27 01:37:05,346 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:37:05,347 INFO L677 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 [2020-10-27 01:37:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:37:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2020-10-27 01:37:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:37:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2020-10-27 01:37:05,360 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 36 [2020-10-27 01:37:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:05,360 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2020-10-27 01:37:05,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:37:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2020-10-27 01:37:05,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:37:05,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:05,362 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:05,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:37:05,362 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:05,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1715434541, now seen corresponding path program 4 times [2020-10-27 01:37:05,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:05,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198792728] [2020-10-27 01:37:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:05,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:05,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:06,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:07,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:07,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:37:07,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:37:07,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1794 [2020-10-27 01:37:07,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:07,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:37:07,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:07,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:37:07,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:07,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:07,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:07,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:07,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:07,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:07,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:07,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:07,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198792728] [2020-10-27 01:37:07,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:07,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:37:07,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634051452] [2020-10-27 01:37:07,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:37:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:37:07,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:37:07,344 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand 13 states. [2020-10-27 01:37:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:07,940 INFO L93 Difference]: Finished difference Result 420 states and 537 transitions. [2020-10-27 01:37:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:37:07,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 01:37:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:07,942 INFO L225 Difference]: With dead ends: 420 [2020-10-27 01:37:07,943 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 01:37:07,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:37:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 01:37:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 120. [2020-10-27 01:37:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:37:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2020-10-27 01:37:07,981 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 39 [2020-10-27 01:37:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:07,981 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2020-10-27 01:37:07,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:37:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2020-10-27 01:37:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:37:07,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:07,983 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:07,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:37:07,983 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:07,984 INFO L82 PathProgramCache]: Analyzing trace with hash 825750579, now seen corresponding path program 5 times [2020-10-27 01:37:07,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:07,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269448322] [2020-10-27 01:37:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:07,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:08,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:08,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:08,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:08,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:37:08,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:08,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-27 01:37:08,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:08,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:37:08,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:08,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:37:08,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:08,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:08,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:08,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:08,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:08,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:08,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:37:08,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:08,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:08,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:08,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:08,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:08,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269448322] [2020-10-27 01:37:08,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:08,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:37:08,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686569566] [2020-10-27 01:37:08,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:37:08,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:08,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:37:08,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:37:08,921 INFO L87 Difference]: Start difference. First operand 120 states and 150 transitions. Second operand 13 states. [2020-10-27 01:37:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:09,147 INFO L93 Difference]: Finished difference Result 265 states and 342 transitions. [2020-10-27 01:37:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:37:09,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 01:37:09,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:09,150 INFO L225 Difference]: With dead ends: 265 [2020-10-27 01:37:09,150 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:37:09,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:37:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:37:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2020-10-27 01:37:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:37:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 174 transitions. [2020-10-27 01:37:09,164 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 174 transitions. Word has length 42 [2020-10-27 01:37:09,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:09,164 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 174 transitions. [2020-10-27 01:37:09,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:37:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 174 transitions. [2020-10-27 01:37:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:37:09,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:09,167 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:09,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:37:09,167 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash -508991725, now seen corresponding path program 6 times [2020-10-27 01:37:09,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:09,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775312939] [2020-10-27 01:37:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:09,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:09,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:10,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:11,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:11,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:37:11,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:37:11,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2295 [2020-10-27 01:37:11,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:11,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:37:11,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:11,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:37:11,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:11,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:11,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:11,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:11,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:11,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:11,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:37:11,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:11,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:37:11,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775312939] [2020-10-27 01:37:11,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:11,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:37:11,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156058101] [2020-10-27 01:37:11,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:37:11,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:11,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:37:11,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:37:11,656 INFO L87 Difference]: Start difference. First operand 140 states and 174 transitions. Second operand 14 states. [2020-10-27 01:37:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:12,486 INFO L93 Difference]: Finished difference Result 340 states and 425 transitions. [2020-10-27 01:37:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:37:12,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 01:37:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:12,488 INFO L225 Difference]: With dead ends: 340 [2020-10-27 01:37:12,488 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 01:37:12,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=501, Invalid=1305, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:37:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 01:37:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2020-10-27 01:37:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 01:37:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 229 transitions. [2020-10-27 01:37:12,505 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 229 transitions. Word has length 45 [2020-10-27 01:37:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:12,505 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 229 transitions. [2020-10-27 01:37:12,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:37:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 229 transitions. [2020-10-27 01:37:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:37:12,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:12,506 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:12,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:37:12,507 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:12,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1095797739, now seen corresponding path program 7 times [2020-10-27 01:37:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:12,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356752006] [2020-10-27 01:37:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:12,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:13,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:13,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:37:13,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:13,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-27 01:37:13,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:13,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:37:13,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:13,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:37:13,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:13,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:13,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:13,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:13,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:13,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:13,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:13,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:13,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:13,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:13,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:13,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356752006] [2020-10-27 01:37:13,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:13,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:37:13,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054052140] [2020-10-27 01:37:13,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:37:13,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:37:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:37:13,474 INFO L87 Difference]: Start difference. First operand 181 states and 229 transitions. Second operand 14 states. [2020-10-27 01:37:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:13,652 INFO L93 Difference]: Finished difference Result 390 states and 505 transitions. [2020-10-27 01:37:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:37:13,653 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 01:37:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:13,655 INFO L225 Difference]: With dead ends: 390 [2020-10-27 01:37:13,655 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 01:37:13,657 INFO L677 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 [2020-10-27 01:37:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 01:37:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 200. [2020-10-27 01:37:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 01:37:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 253 transitions. [2020-10-27 01:37:13,677 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 253 transitions. Word has length 45 [2020-10-27 01:37:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:13,677 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 253 transitions. [2020-10-27 01:37:13,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:37:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 253 transitions. [2020-10-27 01:37:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:37:13,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:13,679 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:13,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:37:13,679 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:13,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2030812175, now seen corresponding path program 8 times [2020-10-27 01:37:13,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:13,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159711014] [2020-10-27 01:37:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:13,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:13,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:13,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:13,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:13,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:13,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:14,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:14,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:14,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:15,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:15,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:37:15,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:37:15,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2052 [2020-10-27 01:37:15,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:37:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:15,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:37:15,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:15,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:15,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:15,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:15,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:15,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:15,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:15,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:15,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:15,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:15,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:15,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:15,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159711014] [2020-10-27 01:37:15,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:15,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:37:15,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983762174] [2020-10-27 01:37:15,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:37:15,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:37:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:37:15,939 INFO L87 Difference]: Start difference. First operand 200 states and 253 transitions. Second operand 15 states. [2020-10-27 01:37:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:16,523 INFO L93 Difference]: Finished difference Result 531 states and 677 transitions. [2020-10-27 01:37:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:37:16,524 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 01:37:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:16,527 INFO L225 Difference]: With dead ends: 531 [2020-10-27 01:37:16,527 INFO L226 Difference]: Without dead ends: 337 [2020-10-27 01:37:16,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:37:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-27 01:37:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 294. [2020-10-27 01:37:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-27 01:37:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 371 transitions. [2020-10-27 01:37:16,551 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 371 transitions. Word has length 48 [2020-10-27 01:37:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:16,553 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 371 transitions. [2020-10-27 01:37:16,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:37:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 371 transitions. [2020-10-27 01:37:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:37:16,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:16,556 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:16,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:37:16,557 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:16,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1871128111, now seen corresponding path program 9 times [2020-10-27 01:37:16,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:16,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165416185] [2020-10-27 01:37:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:16,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:16,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:16,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:16,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:17,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:17,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:37:17,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:17,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-27 01:37:17,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:17,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:37:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:37:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:17,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:17,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:17,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:17,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:17,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:17,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:17,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:17,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:17,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:17,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165416185] [2020-10-27 01:37:17,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:17,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:37:17,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876601713] [2020-10-27 01:37:17,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:37:17,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:17,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:37:17,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:37:17,826 INFO L87 Difference]: Start difference. First operand 294 states and 371 transitions. Second operand 15 states. [2020-10-27 01:37:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:18,068 INFO L93 Difference]: Finished difference Result 656 states and 841 transitions. [2020-10-27 01:37:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:37:18,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 01:37:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:18,071 INFO L225 Difference]: With dead ends: 656 [2020-10-27 01:37:18,072 INFO L226 Difference]: Without dead ends: 368 [2020-10-27 01:37:18,073 INFO L677 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 [2020-10-27 01:37:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-27 01:37:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 325. [2020-10-27 01:37:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 01:37:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 411 transitions. [2020-10-27 01:37:18,096 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 411 transitions. Word has length 48 [2020-10-27 01:37:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:18,096 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 411 transitions. [2020-10-27 01:37:18,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:37:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 411 transitions. [2020-10-27 01:37:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:37:18,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:18,097 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:18,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:37:18,097 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash -281020205, now seen corresponding path program 10 times [2020-10-27 01:37:18,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:18,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620947244] [2020-10-27 01:37:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:18,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:18,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:19,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:20,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:20,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:37:20,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:37:20,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2737 [2020-10-27 01:37:20,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:37:20,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:20,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:37:20,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:21,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:21,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:21,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:21,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:21,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:21,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:21,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620947244] [2020-10-27 01:37:21,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:21,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:37:21,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821021392] [2020-10-27 01:37:21,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:37:21,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:21,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:37:21,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:37:21,068 INFO L87 Difference]: Start difference. First operand 325 states and 411 transitions. Second operand 16 states. [2020-10-27 01:37:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:21,349 INFO L93 Difference]: Finished difference Result 720 states and 925 transitions. [2020-10-27 01:37:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:37:21,350 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-27 01:37:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:21,353 INFO L225 Difference]: With dead ends: 720 [2020-10-27 01:37:21,354 INFO L226 Difference]: Without dead ends: 401 [2020-10-27 01:37:21,355 INFO L677 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 [2020-10-27 01:37:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-27 01:37:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 358. [2020-10-27 01:37:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-27 01:37:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 455 transitions. [2020-10-27 01:37:21,380 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 455 transitions. Word has length 51 [2020-10-27 01:37:21,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:21,381 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 455 transitions. [2020-10-27 01:37:21,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:37:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 455 transitions. [2020-10-27 01:37:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:37:21,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:21,382 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:21,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:37:21,384 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash 340292527, now seen corresponding path program 11 times [2020-10-27 01:37:21,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:21,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759168181] [2020-10-27 01:37:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:21,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:21,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:22,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:22,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:22,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:22,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:22,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:22,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:22,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:23,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:24,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:26,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:26,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:37:26,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 01:37:26,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:37:26,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:37:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:37:26,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:26,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:26,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:26,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:26,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:26,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:26,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:37:26,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:26,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:26,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:26,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:26,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:26,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759168181] [2020-10-27 01:37:26,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:26,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:37:26,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917787577] [2020-10-27 01:37:26,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:37:26,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:26,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:37:26,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:37:26,704 INFO L87 Difference]: Start difference. First operand 358 states and 455 transitions. Second operand 17 states. [2020-10-27 01:37:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:27,442 INFO L93 Difference]: Finished difference Result 907 states and 1164 transitions. [2020-10-27 01:37:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:37:27,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-27 01:37:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:27,448 INFO L225 Difference]: With dead ends: 907 [2020-10-27 01:37:27,448 INFO L226 Difference]: Without dead ends: 555 [2020-10-27 01:37:27,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:37:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-27 01:37:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 352. [2020-10-27 01:37:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-27 01:37:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 447 transitions. [2020-10-27 01:37:27,484 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 447 transitions. Word has length 54 [2020-10-27 01:37:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:27,485 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 447 transitions. [2020-10-27 01:37:27,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:37:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 447 transitions. [2020-10-27 01:37:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:37:27,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:27,486 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:27,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:37:27,487 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash -246513487, now seen corresponding path program 12 times [2020-10-27 01:37:27,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:27,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697739978] [2020-10-27 01:37:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:27,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:27,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:27,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:27,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:27,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:27,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:28,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:28,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:28,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:28,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:29,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:30,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:30,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:37:30,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 01:37:30,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3201 [2020-10-27 01:37:30,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:37:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:37:30,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:30,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:30,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:30,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:30,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:30,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:30,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:37:30,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:30,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:30,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:30,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:37:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:37:30,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697739978] [2020-10-27 01:37:30,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:30,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:37:30,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681941953] [2020-10-27 01:37:30,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:37:30,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:37:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:37:30,962 INFO L87 Difference]: Start difference. First operand 352 states and 447 transitions. Second operand 15 states. [2020-10-27 01:37:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:31,614 INFO L93 Difference]: Finished difference Result 712 states and 903 transitions. [2020-10-27 01:37:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:37:31,614 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-10-27 01:37:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:31,621 INFO L225 Difference]: With dead ends: 712 [2020-10-27 01:37:31,621 INFO L226 Difference]: Without dead ends: 414 [2020-10-27 01:37:31,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:37:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-27 01:37:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 283. [2020-10-27 01:37:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-27 01:37:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 353 transitions. [2020-10-27 01:37:31,650 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 353 transitions. Word has length 54 [2020-10-27 01:37:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:31,650 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 353 transitions. [2020-10-27 01:37:31,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:37:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 353 transitions. [2020-10-27 01:37:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:37:31,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:31,651 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:31,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:37:31,652 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:31,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1935457229, now seen corresponding path program 13 times [2020-10-27 01:37:31,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:31,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111669989] [2020-10-27 01:37:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:31,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:32,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:32,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:37:32,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:37:32,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-10-27 01:37:32,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:32,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:37:32,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:32,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:37:32,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:32,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:32,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:32,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:32,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:32,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:32,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:32,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:32,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:32,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111669989] [2020-10-27 01:37:32,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:32,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:37:32,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979106847] [2020-10-27 01:37:32,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:37:32,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:37:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:37:32,846 INFO L87 Difference]: Start difference. First operand 283 states and 353 transitions. Second operand 17 states. [2020-10-27 01:37:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:33,099 INFO L93 Difference]: Finished difference Result 651 states and 827 transitions. [2020-10-27 01:37:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:37:33,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-27 01:37:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:33,102 INFO L225 Difference]: With dead ends: 651 [2020-10-27 01:37:33,103 INFO L226 Difference]: Without dead ends: 374 [2020-10-27 01:37:33,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:37:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-27 01:37:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 310. [2020-10-27 01:37:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-27 01:37:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 389 transitions. [2020-10-27 01:37:33,129 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 389 transitions. Word has length 54 [2020-10-27 01:37:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:33,129 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 389 transitions. [2020-10-27 01:37:33,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:37:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 389 transitions. [2020-10-27 01:37:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:37:33,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:33,130 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:33,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:37:33,131 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1809105517, now seen corresponding path program 14 times [2020-10-27 01:37:33,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:33,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118946547] [2020-10-27 01:37:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:33,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:33,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:34,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:34,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:34,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:36,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:37:36,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 01:37:36,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3238 [2020-10-27 01:37:36,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:37:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:37:36,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:36,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:36,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:36,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:36,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:36,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:36,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:37:36,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118946547] [2020-10-27 01:37:36,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:36,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:37:36,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005858477] [2020-10-27 01:37:36,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:37:36,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:37:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:37:36,583 INFO L87 Difference]: Start difference. First operand 310 states and 389 transitions. Second operand 16 states. [2020-10-27 01:37:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:37,231 INFO L93 Difference]: Finished difference Result 499 states and 625 transitions. [2020-10-27 01:37:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:37:37,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-27 01:37:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:37,234 INFO L225 Difference]: With dead ends: 499 [2020-10-27 01:37:37,234 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 01:37:37,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=566, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:37:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 01:37:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 182. [2020-10-27 01:37:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 01:37:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2020-10-27 01:37:37,251 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 57 [2020-10-27 01:37:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:37,251 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2020-10-27 01:37:37,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:37:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2020-10-27 01:37:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:37:37,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:37,252 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:37,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:37:37,252 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1776751061, now seen corresponding path program 15 times [2020-10-27 01:37:37,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:37,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449648383] [2020-10-27 01:37:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:37,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:37,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:38,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:38,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:38,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:38,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:39,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:41,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:41,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:37:41,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:37:41,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4302 [2020-10-27 01:37:41,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:37:41,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:41,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:37:41,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:41,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:41,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:41,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:41,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:41,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:41,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:37:41,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:41,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:41,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:37:41,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449648383] [2020-10-27 01:37:41,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:41,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:37:41,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100386529] [2020-10-27 01:37:41,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:37:41,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:41,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:37:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:37:41,830 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand 18 states. [2020-10-27 01:37:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:42,924 INFO L93 Difference]: Finished difference Result 441 states and 552 transitions. [2020-10-27 01:37:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 01:37:42,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-27 01:37:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:42,929 INFO L225 Difference]: With dead ends: 441 [2020-10-27 01:37:42,929 INFO L226 Difference]: Without dead ends: 263 [2020-10-27 01:37:42,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=951, Invalid=2471, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:37:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-27 01:37:42,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 232. [2020-10-27 01:37:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 01:37:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 293 transitions. [2020-10-27 01:37:42,949 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 293 transitions. Word has length 57 [2020-10-27 01:37:42,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:42,949 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 293 transitions. [2020-10-27 01:37:42,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:37:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 293 transitions. [2020-10-27 01:37:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:37:42,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:42,950 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:42,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:37:42,951 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash 168876693, now seen corresponding path program 16 times [2020-10-27 01:37:42,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:42,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326551556] [2020-10-27 01:37:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:42,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:42,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:43,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:43,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:43,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:43,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:43,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:37:43,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:43,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-27 01:37:43,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:43,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:37:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:37:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:43,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:43,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:43,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:43,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:43,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:43,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:43,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:43,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326551556] [2020-10-27 01:37:43,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:43,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:37:43,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37910767] [2020-10-27 01:37:43,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:37:43,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:43,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:37:43,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:37:43,710 INFO L87 Difference]: Start difference. First operand 232 states and 293 transitions. Second operand 18 states. [2020-10-27 01:37:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:44,012 INFO L93 Difference]: Finished difference Result 507 states and 651 transitions. [2020-10-27 01:37:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:37:44,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-27 01:37:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:44,017 INFO L225 Difference]: With dead ends: 507 [2020-10-27 01:37:44,017 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 01:37:44,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:37:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 01:37:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 251. [2020-10-27 01:37:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 01:37:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 317 transitions. [2020-10-27 01:37:44,048 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 317 transitions. Word has length 57 [2020-10-27 01:37:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:44,048 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 317 transitions. [2020-10-27 01:37:44,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:37:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 317 transitions. [2020-10-27 01:37:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:37:44,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:44,049 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:44,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:37:44,049 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1567928975, now seen corresponding path program 17 times [2020-10-27 01:37:44,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:44,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865783612] [2020-10-27 01:37:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:44,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1345 [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:37:45,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:45,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:45,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:45,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:45,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:45,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:45,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:45,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865783612] [2020-10-27 01:37:45,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:45,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:37:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408041047] [2020-10-27 01:37:45,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:37:45,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:45,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:37:45,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:37:45,686 INFO L87 Difference]: Start difference. First operand 251 states and 317 transitions. Second operand 20 states. [2020-10-27 01:37:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:46,520 INFO L93 Difference]: Finished difference Result 645 states and 815 transitions. [2020-10-27 01:37:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:37:46,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-27 01:37:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:46,523 INFO L225 Difference]: With dead ends: 645 [2020-10-27 01:37:46,524 INFO L226 Difference]: Without dead ends: 335 [2020-10-27 01:37:46,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=420, Invalid=912, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:37:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-27 01:37:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 237. [2020-10-27 01:37:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 01:37:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 298 transitions. [2020-10-27 01:37:46,544 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 298 transitions. Word has length 60 [2020-10-27 01:37:46,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:46,544 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 298 transitions. [2020-10-27 01:37:46,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:37:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 298 transitions. [2020-10-27 01:37:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:37:46,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:46,545 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:46,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:37:46,545 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:46,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1412523477, now seen corresponding path program 18 times [2020-10-27 01:37:46,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:46,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089352756] [2020-10-27 01:37:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:46,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:46,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:46,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:37:47,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:47,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:47,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:47,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:47,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:47,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:47,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:47,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:47,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:47,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:47,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089352756] [2020-10-27 01:37:47,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:47,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:37:47,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45273208] [2020-10-27 01:37:47,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:37:47,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:37:47,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:37:47,566 INFO L87 Difference]: Start difference. First operand 237 states and 298 transitions. Second operand 20 states. [2020-10-27 01:37:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:47,858 INFO L93 Difference]: Finished difference Result 527 states and 675 transitions. [2020-10-27 01:37:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:37:47,858 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-10-27 01:37:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:47,862 INFO L225 Difference]: With dead ends: 527 [2020-10-27 01:37:47,863 INFO L226 Difference]: Without dead ends: 296 [2020-10-27 01:37:47,869 INFO L677 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 [2020-10-27 01:37:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-27 01:37:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 263. [2020-10-27 01:37:47,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-27 01:37:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 330 transitions. [2020-10-27 01:37:47,893 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 330 transitions. Word has length 63 [2020-10-27 01:37:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:47,893 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 330 transitions. [2020-10-27 01:37:47,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:37:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 330 transitions. [2020-10-27 01:37:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:37:47,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:47,894 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:47,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:37:47,894 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:47,895 INFO L82 PathProgramCache]: Analyzing trace with hash -474482127, now seen corresponding path program 19 times [2020-10-27 01:37:47,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:47,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375771105] [2020-10-27 01:37:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:47,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:48,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:48,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:48,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:48,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:48,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:48,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:48,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:49,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:49,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:37:49,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:37:49,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1824 [2020-10-27 01:37:49,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:37:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:37:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:50,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:50,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:50,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:50,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:50,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:50,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:50,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:50,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:50,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:50,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:50,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375771105] [2020-10-27 01:37:50,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:50,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:37:50,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353371265] [2020-10-27 01:37:50,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:37:50,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:50,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:37:50,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:37:50,070 INFO L87 Difference]: Start difference. First operand 263 states and 330 transitions. Second operand 21 states. [2020-10-27 01:37:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:50,362 INFO L93 Difference]: Finished difference Result 566 states and 721 transitions. [2020-10-27 01:37:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:37:50,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-27 01:37:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:50,366 INFO L225 Difference]: With dead ends: 566 [2020-10-27 01:37:50,366 INFO L226 Difference]: Without dead ends: 309 [2020-10-27 01:37:50,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:37:50,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-27 01:37:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 281. [2020-10-27 01:37:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-27 01:37:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 354 transitions. [2020-10-27 01:37:50,406 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 354 transitions. Word has length 66 [2020-10-27 01:37:50,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:50,407 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 354 transitions. [2020-10-27 01:37:50,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:37:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 354 transitions. [2020-10-27 01:37:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:37:50,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:50,408 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:50,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:37:50,408 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:50,411 INFO L82 PathProgramCache]: Analyzing trace with hash 568506453, now seen corresponding path program 20 times [2020-10-27 01:37:50,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:50,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384969706] [2020-10-27 01:37:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:50,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:50,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:51,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:51,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:51,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:51,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:52,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:52,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:55,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:55,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:37:55,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:37:55,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:37:55,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:37:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:37:55,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:55,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:55,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:55,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:55,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384969706] [2020-10-27 01:37:55,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:55,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:37:55,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277061011] [2020-10-27 01:37:55,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:37:55,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:55,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:37:55,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:37:55,785 INFO L87 Difference]: Start difference. First operand 281 states and 354 transitions. Second operand 23 states. [2020-10-27 01:37:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:57,641 INFO L93 Difference]: Finished difference Result 683 states and 863 transitions. [2020-10-27 01:37:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-27 01:37:57,642 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-10-27 01:37:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:57,646 INFO L225 Difference]: With dead ends: 683 [2020-10-27 01:37:57,646 INFO L226 Difference]: Without dead ends: 402 [2020-10-27 01:37:57,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1716, Invalid=4446, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:37:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-27 01:37:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 345. [2020-10-27 01:37:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-27 01:37:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 439 transitions. [2020-10-27 01:37:57,675 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 439 transitions. Word has length 69 [2020-10-27 01:37:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:57,675 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 439 transitions. [2020-10-27 01:37:57,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:37:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 439 transitions. [2020-10-27 01:37:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:37:57,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:57,676 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:57,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:37:57,677 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:57,677 INFO L82 PathProgramCache]: Analyzing trace with hash -848944141, now seen corresponding path program 21 times [2020-10-27 01:37:57,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:57,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746922542] [2020-10-27 01:37:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:57,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:57,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:57,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:57,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:57,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:58,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:58,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:37:58,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:37:58,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-27 01:37:58,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:37:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:37:58,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:58,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:58,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:58,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:58,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:58,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:58,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:58,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:58,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:58,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:58,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:58,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746922542] [2020-10-27 01:37:58,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:58,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:37:58,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647551798] [2020-10-27 01:37:58,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:37:58,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:37:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:37:58,738 INFO L87 Difference]: Start difference. First operand 345 states and 439 transitions. Second operand 24 states. [2020-10-27 01:37:59,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:59,791 INFO L93 Difference]: Finished difference Result 878 states and 1119 transitions. [2020-10-27 01:37:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:37:59,793 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2020-10-27 01:37:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:59,796 INFO L225 Difference]: With dead ends: 878 [2020-10-27 01:37:59,797 INFO L226 Difference]: Without dead ends: 465 [2020-10-27 01:37:59,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=642, Invalid=1338, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:37:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-27 01:37:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 285. [2020-10-27 01:37:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-27 01:37:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 358 transitions. [2020-10-27 01:37:59,845 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 358 transitions. Word has length 72 [2020-10-27 01:37:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:59,845 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 358 transitions. [2020-10-27 01:37:59,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:37:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 358 transitions. [2020-10-27 01:37:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:37:59,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:59,846 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:59,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:37:59,846 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:59,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1586090923, now seen corresponding path program 22 times [2020-10-27 01:37:59,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:59,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026644506] [2020-10-27 01:37:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:59,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:59,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:59,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:38:00,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:01,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:01,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:01,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:01,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:01,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:01,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:01,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:01,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026644506] [2020-10-27 01:38:01,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:01,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:38:01,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295486266] [2020-10-27 01:38:01,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:38:01,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:01,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:38:01,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:38:01,084 INFO L87 Difference]: Start difference. First operand 285 states and 358 transitions. Second operand 24 states. [2020-10-27 01:38:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:01,385 INFO L93 Difference]: Finished difference Result 623 states and 795 transitions. [2020-10-27 01:38:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:38:01,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2020-10-27 01:38:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:01,390 INFO L225 Difference]: With dead ends: 623 [2020-10-27 01:38:01,390 INFO L226 Difference]: Without dead ends: 344 [2020-10-27 01:38:01,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:38:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-27 01:38:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 311. [2020-10-27 01:38:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-27 01:38:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 390 transitions. [2020-10-27 01:38:01,415 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 390 transitions. Word has length 75 [2020-10-27 01:38:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:01,415 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 390 transitions. [2020-10-27 01:38:01,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:38:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 390 transitions. [2020-10-27 01:38:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:38:01,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:01,416 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:01,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:38:01,417 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1171283023, now seen corresponding path program 23 times [2020-10-27 01:38:01,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:01,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643887372] [2020-10-27 01:38:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:02,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:02,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2278 [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:38:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:04,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:04,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:04,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:04,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:04,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:38:04,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:04,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:04,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643887372] [2020-10-27 01:38:04,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:04,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:38:04,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167145450] [2020-10-27 01:38:04,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:38:04,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:04,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:38:04,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:38:04,168 INFO L87 Difference]: Start difference. First operand 311 states and 390 transitions. Second operand 25 states. [2020-10-27 01:38:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:04,519 INFO L93 Difference]: Finished difference Result 662 states and 841 transitions. [2020-10-27 01:38:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:38:04,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-10-27 01:38:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:04,524 INFO L225 Difference]: With dead ends: 662 [2020-10-27 01:38:04,524 INFO L226 Difference]: Without dead ends: 357 [2020-10-27 01:38:04,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:38:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-27 01:38:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 329. [2020-10-27 01:38:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-27 01:38:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 414 transitions. [2020-10-27 01:38:04,565 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 414 transitions. Word has length 78 [2020-10-27 01:38:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:04,565 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 414 transitions. [2020-10-27 01:38:04,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:38:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 414 transitions. [2020-10-27 01:38:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:38:04,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:04,567 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 19, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:04,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:38:04,567 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash -250044715, now seen corresponding path program 24 times [2020-10-27 01:38:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:04,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954052743] [2020-10-27 01:38:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:04,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:07,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:07,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:09,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:09,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:38:09,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:38:09,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:38:09,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:09,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:38:09,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:09,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:38:09,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:10,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:10,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:10,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:10,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:10,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:10,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:38:10,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:10,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:10,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954052743] [2020-10-27 01:38:10,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:10,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:38:10,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953405266] [2020-10-27 01:38:10,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:38:10,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:38:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:38:10,049 INFO L87 Difference]: Start difference. First operand 329 states and 414 transitions. Second operand 26 states. [2020-10-27 01:38:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:11,037 INFO L93 Difference]: Finished difference Result 853 states and 1073 transitions. [2020-10-27 01:38:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:38:11,044 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-10-27 01:38:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:11,047 INFO L225 Difference]: With dead ends: 853 [2020-10-27 01:38:11,047 INFO L226 Difference]: Without dead ends: 530 [2020-10-27 01:38:11,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:38:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-27 01:38:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 489. [2020-10-27 01:38:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-27 01:38:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 610 transitions. [2020-10-27 01:38:11,081 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 610 transitions. Word has length 81 [2020-10-27 01:38:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:11,081 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 610 transitions. [2020-10-27 01:38:11,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:38:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 610 transitions. [2020-10-27 01:38:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:38:11,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:11,083 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:11,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:38:11,083 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash -643071725, now seen corresponding path program 25 times [2020-10-27 01:38:11,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:11,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60148784] [2020-10-27 01:38:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:11,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:11,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:11,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:11,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:11,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:11,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:11,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:12,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:12,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:14,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:14,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:38:14,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:38:14,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3148 [2020-10-27 01:38:14,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:14,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:38:14,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:14,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:38:14,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:14,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:14,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:14,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:14,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:14,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:14,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:14,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:14,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:14,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60148784] [2020-10-27 01:38:14,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:14,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:38:14,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41858129] [2020-10-27 01:38:14,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:38:14,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:14,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:38:14,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:38:14,691 INFO L87 Difference]: Start difference. First operand 489 states and 610 transitions. Second operand 26 states. [2020-10-27 01:38:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:15,817 INFO L93 Difference]: Finished difference Result 1035 states and 1297 transitions. [2020-10-27 01:38:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:38:15,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-10-27 01:38:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:15,821 INFO L225 Difference]: With dead ends: 1035 [2020-10-27 01:38:15,821 INFO L226 Difference]: Without dead ends: 712 [2020-10-27 01:38:15,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:38:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2020-10-27 01:38:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 578. [2020-10-27 01:38:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-27 01:38:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 711 transitions. [2020-10-27 01:38:15,864 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 711 transitions. Word has length 81 [2020-10-27 01:38:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:15,864 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 711 transitions. [2020-10-27 01:38:15,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:38:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 711 transitions. [2020-10-27 01:38:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:38:15,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:15,865 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:15,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:38:15,866 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:15,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1229877739, now seen corresponding path program 26 times [2020-10-27 01:38:15,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:15,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655662312] [2020-10-27 01:38:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:15,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:15,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:15,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:16,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:16,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:16,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:17,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:17,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:38:17,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:38:17,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1355 [2020-10-27 01:38:17,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:38:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:38:17,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:17,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:17,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:17,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:17,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:17,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:17,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:38:17,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:17,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:17,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:17,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:17,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:38:17,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655662312] [2020-10-27 01:38:17,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:17,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:38:17,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065384573] [2020-10-27 01:38:17,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:38:17,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:17,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:38:17,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:38:17,679 INFO L87 Difference]: Start difference. First operand 578 states and 711 transitions. Second operand 25 states. [2020-10-27 01:38:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:18,677 INFO L93 Difference]: Finished difference Result 830 states and 1023 transitions. [2020-10-27 01:38:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:38:18,680 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-10-27 01:38:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:18,683 INFO L225 Difference]: With dead ends: 830 [2020-10-27 01:38:18,683 INFO L226 Difference]: Without dead ends: 497 [2020-10-27 01:38:18,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=1457, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:38:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-27 01:38:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 408. [2020-10-27 01:38:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-27 01:38:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 501 transitions. [2020-10-27 01:38:18,716 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 501 transitions. Word has length 81 [2020-10-27 01:38:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:18,717 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 501 transitions. [2020-10-27 01:38:18,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:38:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 501 transitions. [2020-10-27 01:38:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:38:18,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:18,718 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:18,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:38:18,718 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:18,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1664140079, now seen corresponding path program 27 times [2020-10-27 01:38:18,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:18,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061809545] [2020-10-27 01:38:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:18,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:18,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:19,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:20,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:20,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:38:20,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:38:20,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1406 [2020-10-27 01:38:20,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:20,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:38:20,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:20,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:38:20,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:20,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:20,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:20,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:20,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:20,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:38:20,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:20,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:20,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061809545] [2020-10-27 01:38:20,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:20,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:38:20,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156403475] [2020-10-27 01:38:20,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:38:20,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:20,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:38:20,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:38:20,617 INFO L87 Difference]: Start difference. First operand 408 states and 501 transitions. Second operand 26 states. [2020-10-27 01:38:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:21,021 INFO L93 Difference]: Finished difference Result 879 states and 1093 transitions. [2020-10-27 01:38:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:38:21,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-10-27 01:38:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:21,024 INFO L225 Difference]: With dead ends: 879 [2020-10-27 01:38:21,024 INFO L226 Difference]: Without dead ends: 477 [2020-10-27 01:38:21,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:38:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-27 01:38:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 433. [2020-10-27 01:38:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-27 01:38:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 533 transitions. [2020-10-27 01:38:21,057 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 533 transitions. Word has length 81 [2020-10-27 01:38:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:21,057 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 533 transitions. [2020-10-27 01:38:21,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:38:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 533 transitions. [2020-10-27 01:38:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:38:21,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:21,059 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:21,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:38:21,060 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:21,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1732364017, now seen corresponding path program 28 times [2020-10-27 01:38:21,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:21,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725021109] [2020-10-27 01:38:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:21,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:24,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:24,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:38:24,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:38:24,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2939 [2020-10-27 01:38:24,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:38:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 01:38:24,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:24,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:24,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:24,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:24,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:24,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:24,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:38:24,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:24,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 775 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:38:24,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725021109] [2020-10-27 01:38:24,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:24,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:38:24,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661885130] [2020-10-27 01:38:24,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:38:24,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:38:24,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:38:24,489 INFO L87 Difference]: Start difference. First operand 433 states and 533 transitions. Second operand 26 states. [2020-10-27 01:38:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:25,698 INFO L93 Difference]: Finished difference Result 696 states and 858 transitions. [2020-10-27 01:38:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:38:25,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2020-10-27 01:38:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:25,701 INFO L225 Difference]: With dead ends: 696 [2020-10-27 01:38:25,701 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 01:38:25,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=771, Invalid=1581, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:38:25,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 01:38:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 335. [2020-10-27 01:38:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-27 01:38:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 420 transitions. [2020-10-27 01:38:25,730 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 420 transitions. Word has length 84 [2020-10-27 01:38:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:25,730 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 420 transitions. [2020-10-27 01:38:25,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:38:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 420 transitions. [2020-10-27 01:38:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:38:25,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:25,732 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:25,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:38:25,732 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:25,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1104322673, now seen corresponding path program 29 times [2020-10-27 01:38:25,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:25,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204732431] [2020-10-27 01:38:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:25,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:25,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:25,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:25,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:25,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:26,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:26,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:26,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:26,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:28,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:28,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:38:28,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:38:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2470 [2020-10-27 01:38:28,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:38:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 01:38:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:28,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:28,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:28,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:28,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:28,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:38:28,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:28,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:28,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:28,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:28,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:28,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204732431] [2020-10-27 01:38:28,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:28,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:38:28,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67779790] [2020-10-27 01:38:28,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:38:28,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:38:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:38:28,767 INFO L87 Difference]: Start difference. First operand 335 states and 420 transitions. Second operand 27 states. [2020-10-27 01:38:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:29,140 INFO L93 Difference]: Finished difference Result 715 states and 906 transitions. [2020-10-27 01:38:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:38:29,140 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2020-10-27 01:38:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:29,142 INFO L225 Difference]: With dead ends: 715 [2020-10-27 01:38:29,142 INFO L226 Difference]: Without dead ends: 386 [2020-10-27 01:38:29,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:38:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-27 01:38:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 353. [2020-10-27 01:38:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-27 01:38:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 444 transitions. [2020-10-27 01:38:29,171 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 444 transitions. Word has length 84 [2020-10-27 01:38:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:29,172 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 444 transitions. [2020-10-27 01:38:29,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:38:29,172 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 444 transitions. [2020-10-27 01:38:29,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 01:38:29,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:29,173 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:29,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:38:29,173 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:29,174 INFO L82 PathProgramCache]: Analyzing trace with hash 555444757, now seen corresponding path program 30 times [2020-10-27 01:38:29,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:29,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712977898] [2020-10-27 01:38:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:30,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:30,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:30,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:30,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:31,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:31,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:31,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:31,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:32,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:34,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:34,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 01:38:34,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:38:34,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:38:34,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:38:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:38:34,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:34,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:34,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:34,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:34,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:34,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:34,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:38:34,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:34,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:34,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:34,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:34,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:38:34,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712977898] [2020-10-27 01:38:34,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:34,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:38:34,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137262670] [2020-10-27 01:38:34,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:38:34,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:34,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:38:34,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:38:34,717 INFO L87 Difference]: Start difference. First operand 353 states and 444 transitions. Second operand 28 states. [2020-10-27 01:38:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:37,227 INFO L93 Difference]: Finished difference Result 826 states and 1039 transitions. [2020-10-27 01:38:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-27 01:38:37,228 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2020-10-27 01:38:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:37,230 INFO L225 Difference]: With dead ends: 826 [2020-10-27 01:38:37,230 INFO L226 Difference]: Without dead ends: 477 [2020-10-27 01:38:37,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2706, Invalid=6996, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:38:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-27 01:38:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 433. [2020-10-27 01:38:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-27 01:38:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 550 transitions. [2020-10-27 01:38:37,265 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 550 transitions. Word has length 87 [2020-10-27 01:38:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:37,266 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 550 transitions. [2020-10-27 01:38:37,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:38:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 550 transitions. [2020-10-27 01:38:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 01:38:37,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:37,267 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:37,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:38:37,267 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1052429611, now seen corresponding path program 31 times [2020-10-27 01:38:37,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:37,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124618416] [2020-10-27 01:38:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:37,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:37,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:37,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:37,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:37,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:38,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:38,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 01:38:38,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:38:38,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-27 01:38:38,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:38:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:38:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:38,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:38,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:38,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:38,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:38,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:38:38,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:38,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:38,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:38,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:38,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:38,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124618416] [2020-10-27 01:38:38,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:38,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:38:38,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795240379] [2020-10-27 01:38:38,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:38:38,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:38:38,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:38:38,798 INFO L87 Difference]: Start difference. First operand 433 states and 550 transitions. Second operand 29 states. [2020-10-27 01:38:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:41,758 INFO L93 Difference]: Finished difference Result 1014 states and 1289 transitions. [2020-10-27 01:38:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-27 01:38:41,759 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 87 [2020-10-27 01:38:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:41,761 INFO L225 Difference]: With dead ends: 1014 [2020-10-27 01:38:41,761 INFO L226 Difference]: Without dead ends: 584 [2020-10-27 01:38:41,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2905 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2931, Invalid=7575, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:38:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-10-27 01:38:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 435. [2020-10-27 01:38:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-27 01:38:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 553 transitions. [2020-10-27 01:38:41,800 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 553 transitions. Word has length 87 [2020-10-27 01:38:41,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:41,800 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 553 transitions. [2020-10-27 01:38:41,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:38:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 553 transitions. [2020-10-27 01:38:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:38:41,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:41,801 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:41,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:38:41,801 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:41,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:41,802 INFO L82 PathProgramCache]: Analyzing trace with hash 872094259, now seen corresponding path program 32 times [2020-10-27 01:38:41,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:41,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001477602] [2020-10-27 01:38:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:41,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:41,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:42,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:42,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 01:38:42,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:43,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:43,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001477602] [2020-10-27 01:38:43,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:43,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:38:43,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870247748] [2020-10-27 01:38:43,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:38:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:38:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:38:43,364 INFO L87 Difference]: Start difference. First operand 435 states and 553 transitions. Second operand 29 states. [2020-10-27 01:38:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:43,820 INFO L93 Difference]: Finished difference Result 946 states and 1218 transitions. [2020-10-27 01:38:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:38:43,821 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 90 [2020-10-27 01:38:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:43,824 INFO L225 Difference]: With dead ends: 946 [2020-10-27 01:38:43,824 INFO L226 Difference]: Without dead ends: 517 [2020-10-27 01:38:43,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:38:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-27 01:38:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 473. [2020-10-27 01:38:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-10-27 01:38:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 601 transitions. [2020-10-27 01:38:43,859 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 601 transitions. Word has length 90 [2020-10-27 01:38:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:43,859 INFO L481 AbstractCegarLoop]: Abstraction has 473 states and 601 transitions. [2020-10-27 01:38:43,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:38:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 601 transitions. [2020-10-27 01:38:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:38:43,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:43,860 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:43,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:38:43,861 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1431077139, now seen corresponding path program 33 times [2020-10-27 01:38:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:43,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48185057] [2020-10-27 01:38:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:43,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:43,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:44,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:44,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:44,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:44,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:44,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:44,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:44,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:45,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:46,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:46,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 01:38:46,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:38:46,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2389 [2020-10-27 01:38:46,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:38:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:38:46,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:46,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:46,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:46,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:46,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:46,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:46,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:38:46,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:46,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:46,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:46,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:46,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:46,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48185057] [2020-10-27 01:38:46,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:46,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:38:46,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913429612] [2020-10-27 01:38:46,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:38:46,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:46,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:38:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:38:46,921 INFO L87 Difference]: Start difference. First operand 473 states and 601 transitions. Second operand 30 states. [2020-10-27 01:38:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:48,498 INFO L93 Difference]: Finished difference Result 1172 states and 1484 transitions. [2020-10-27 01:38:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 01:38:48,499 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2020-10-27 01:38:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:48,502 INFO L225 Difference]: With dead ends: 1172 [2020-10-27 01:38:48,502 INFO L226 Difference]: Without dead ends: 705 [2020-10-27 01:38:48,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1140, Invalid=2052, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:38:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-10-27 01:38:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 657. [2020-10-27 01:38:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-10-27 01:38:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 824 transitions. [2020-10-27 01:38:48,546 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 824 transitions. Word has length 93 [2020-10-27 01:38:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:48,546 INFO L481 AbstractCegarLoop]: Abstraction has 657 states and 824 transitions. [2020-10-27 01:38:48,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:38:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 824 transitions. [2020-10-27 01:38:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:38:48,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:48,547 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:48,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:38:48,548 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:48,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1038050129, now seen corresponding path program 34 times [2020-10-27 01:38:48,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:48,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741369347] [2020-10-27 01:38:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:48,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:48,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:48,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:48,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:48,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:49,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:49,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 01:38:49,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:38:49,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-27 01:38:49,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:38:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:38:49,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:50,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:50,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:50,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:50,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:50,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:50,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:38:50,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:50,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:50,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:50,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:50,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:38:50,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741369347] [2020-10-27 01:38:50,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:50,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:38:50,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862355951] [2020-10-27 01:38:50,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:38:50,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:38:50,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:38:50,543 INFO L87 Difference]: Start difference. First operand 657 states and 824 transitions. Second operand 30 states. [2020-10-27 01:38:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:52,110 INFO L93 Difference]: Finished difference Result 1132 states and 1427 transitions. [2020-10-27 01:38:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:38:52,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2020-10-27 01:38:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:52,114 INFO L225 Difference]: With dead ends: 1132 [2020-10-27 01:38:52,114 INFO L226 Difference]: Without dead ends: 571 [2020-10-27 01:38:52,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1065, Invalid=2127, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:38:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-27 01:38:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 367. [2020-10-27 01:38:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-27 01:38:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 460 transitions. [2020-10-27 01:38:52,144 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 460 transitions. Word has length 93 [2020-10-27 01:38:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:52,144 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 460 transitions. [2020-10-27 01:38:52,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:38:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 460 transitions. [2020-10-27 01:38:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:38:52,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:52,145 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:52,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:38:52,146 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash 844271125, now seen corresponding path program 35 times [2020-10-27 01:38:52,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:52,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842542647] [2020-10-27 01:38:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:52,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:52,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:53,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:53,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 01:38:53,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:38:53,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1051 [2020-10-27 01:38:53,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:53,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:38:53,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:53,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:38:53,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:53,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:53,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:53,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:53,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:53,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:53,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:38:53,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:53,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:53,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:53,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:53,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:53,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842542647] [2020-10-27 01:38:53,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:53,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:38:53,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485552541] [2020-10-27 01:38:53,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:38:53,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:38:53,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:38:53,832 INFO L87 Difference]: Start difference. First operand 367 states and 460 transitions. Second operand 30 states. [2020-10-27 01:38:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:54,293 INFO L93 Difference]: Finished difference Result 777 states and 982 transitions. [2020-10-27 01:38:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:38:54,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2020-10-27 01:38:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:54,295 INFO L225 Difference]: With dead ends: 777 [2020-10-27 01:38:54,295 INFO L226 Difference]: Without dead ends: 416 [2020-10-27 01:38:54,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:38:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-27 01:38:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 383. [2020-10-27 01:38:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-27 01:38:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 480 transitions. [2020-10-27 01:38:54,330 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 480 transitions. Word has length 93 [2020-10-27 01:38:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:54,330 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 480 transitions. [2020-10-27 01:38:54,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:38:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 480 transitions. [2020-10-27 01:38:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:38:54,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:54,331 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:54,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:38:54,331 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1480780273, now seen corresponding path program 36 times [2020-10-27 01:38:54,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:54,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462818447] [2020-10-27 01:38:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:54,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:54,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:54,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:55,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:55,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:55,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:55,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:55,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:55,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:56,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:56,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:38:56,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:38:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2327 [2020-10-27 01:38:56,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:38:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 01:38:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:57,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:57,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:57,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:57,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:57,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:57,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:38:57,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:57,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:57,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:57,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:57,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:57,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462818447] [2020-10-27 01:38:57,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:57,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:38:57,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020226386] [2020-10-27 01:38:57,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:38:57,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:57,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:38:57,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:38:57,347 INFO L87 Difference]: Start difference. First operand 383 states and 480 transitions. Second operand 31 states. [2020-10-27 01:38:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:57,817 INFO L93 Difference]: Finished difference Result 811 states and 1026 transitions. [2020-10-27 01:38:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:38:57,823 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 96 [2020-10-27 01:38:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:57,825 INFO L225 Difference]: With dead ends: 811 [2020-10-27 01:38:57,825 INFO L226 Difference]: Without dead ends: 434 [2020-10-27 01:38:57,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:38:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-27 01:38:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 401. [2020-10-27 01:38:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-27 01:38:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 504 transitions. [2020-10-27 01:38:57,874 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 504 transitions. Word has length 96 [2020-10-27 01:38:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:57,876 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 504 transitions. [2020-10-27 01:38:57,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:38:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 504 transitions. [2020-10-27 01:38:57,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 01:38:57,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:57,877 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:57,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:38:57,878 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1444196501, now seen corresponding path program 37 times [2020-10-27 01:38:57,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:57,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401382389] [2020-10-27 01:38:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:57,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:57,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:58,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:58,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:58,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:59,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:59,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:59,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:59,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:00,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:00,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:00,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:01,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:01,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:01,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:02,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:02,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:39:02,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:39:02,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:39:02,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:39:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 01:39:02,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:03,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:03,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:03,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:03,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:03,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:03,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:03,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:03,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:03,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401382389] [2020-10-27 01:39:03,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:03,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:39:03,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999103123] [2020-10-27 01:39:03,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:39:03,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:03,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:39:03,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:39:03,654 INFO L87 Difference]: Start difference. First operand 401 states and 504 transitions. Second operand 32 states. [2020-10-27 01:39:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:04,143 INFO L93 Difference]: Finished difference Result 847 states and 1074 transitions. [2020-10-27 01:39:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:39:04,144 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 99 [2020-10-27 01:39:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:04,146 INFO L225 Difference]: With dead ends: 847 [2020-10-27 01:39:04,146 INFO L226 Difference]: Without dead ends: 452 [2020-10-27 01:39:04,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:39:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-27 01:39:04,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 419. [2020-10-27 01:39:04,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-27 01:39:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 528 transitions. [2020-10-27 01:39:04,184 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 528 transitions. Word has length 99 [2020-10-27 01:39:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:04,185 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 528 transitions. [2020-10-27 01:39:04,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:39:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 528 transitions. [2020-10-27 01:39:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:39:04,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:04,186 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 25, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:04,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:39:04,186 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:04,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1796229263, now seen corresponding path program 38 times [2020-10-27 01:39:04,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:04,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697162379] [2020-10-27 01:39:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:04,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:04,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:04,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:04,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:04,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:04,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:04,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:04,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:06,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:06,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:07,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:09,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:09,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:39:09,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 01:39:09,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:39:09,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:09,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:39:09,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:09,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:39:09,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:09,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:09,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:09,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:09,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:09,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:09,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:09,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:39:09,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697162379] [2020-10-27 01:39:09,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:09,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:39:09,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530178020] [2020-10-27 01:39:09,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:39:09,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:39:09,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:39:09,858 INFO L87 Difference]: Start difference. First operand 419 states and 528 transitions. Second operand 31 states. [2020-10-27 01:39:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:11,477 INFO L93 Difference]: Finished difference Result 1088 states and 1363 transitions. [2020-10-27 01:39:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 01:39:11,477 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 102 [2020-10-27 01:39:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:11,480 INFO L225 Difference]: With dead ends: 1088 [2020-10-27 01:39:11,480 INFO L226 Difference]: Without dead ends: 675 [2020-10-27 01:39:11,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1224, Invalid=2198, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:39:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-10-27 01:39:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 631. [2020-10-27 01:39:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-10-27 01:39:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 786 transitions. [2020-10-27 01:39:11,528 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 786 transitions. Word has length 102 [2020-10-27 01:39:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:11,528 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 786 transitions. [2020-10-27 01:39:11,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:39:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 786 transitions. [2020-10-27 01:39:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:39:11,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:11,529 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 26, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:11,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:39:11,530 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:11,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2105711023, now seen corresponding path program 39 times [2020-10-27 01:39:11,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:11,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970704413] [2020-10-27 01:39:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:11,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:12,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:13,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:14,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:16,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:16,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:16,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:16,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:39:16,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:39:16,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:39:16,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:16,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:39:16,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:16,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:39:16,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:17,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:17,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:17,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:17,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970704413] [2020-10-27 01:39:17,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:17,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:39:17,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884171737] [2020-10-27 01:39:17,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:39:17,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:17,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:39:17,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:39:17,343 INFO L87 Difference]: Start difference. First operand 631 states and 786 transitions. Second operand 33 states. [2020-10-27 01:39:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:18,849 INFO L93 Difference]: Finished difference Result 1539 states and 1924 transitions. [2020-10-27 01:39:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 01:39:18,849 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 102 [2020-10-27 01:39:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:18,853 INFO L225 Difference]: With dead ends: 1539 [2020-10-27 01:39:18,853 INFO L226 Difference]: Without dead ends: 914 [2020-10-27 01:39:18,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1401, Invalid=2505, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:39:18,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2020-10-27 01:39:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 529. [2020-10-27 01:39:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-10-27 01:39:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 651 transitions. [2020-10-27 01:39:18,926 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 651 transitions. Word has length 102 [2020-10-27 01:39:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:18,927 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 651 transitions. [2020-10-27 01:39:18,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:39:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 651 transitions. [2020-10-27 01:39:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:39:18,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:18,928 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:18,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:39:18,928 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1518905009, now seen corresponding path program 40 times [2020-10-27 01:39:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:18,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688183288] [2020-10-27 01:39:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:18,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:19,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:22,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:22,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:22,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:39:22,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 01:39:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4052 [2020-10-27 01:39:22,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:39:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:39:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:23,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:23,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:23,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:23,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:23,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:23,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:23,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:23,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:23,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688183288] [2020-10-27 01:39:23,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:23,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:39:23,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561339982] [2020-10-27 01:39:23,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:39:23,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:39:23,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:39:23,741 INFO L87 Difference]: Start difference. First operand 529 states and 651 transitions. Second operand 33 states. [2020-10-27 01:39:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:25,141 INFO L93 Difference]: Finished difference Result 1140 states and 1414 transitions. [2020-10-27 01:39:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 01:39:25,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 102 [2020-10-27 01:39:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:25,145 INFO L225 Difference]: With dead ends: 1140 [2020-10-27 01:39:25,145 INFO L226 Difference]: Without dead ends: 823 [2020-10-27 01:39:25,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1401, Invalid=2505, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:39:25,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2020-10-27 01:39:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 741. [2020-10-27 01:39:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2020-10-27 01:39:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 909 transitions. [2020-10-27 01:39:25,203 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 909 transitions. Word has length 102 [2020-10-27 01:39:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:25,203 INFO L481 AbstractCegarLoop]: Abstraction has 741 states and 909 transitions. [2020-10-27 01:39:25,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:39:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 909 transitions. [2020-10-27 01:39:25,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:39:25,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:25,204 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:25,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:39:25,204 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 497836655, now seen corresponding path program 41 times [2020-10-27 01:39:25,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:25,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503153464] [2020-10-27 01:39:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:26,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2005 [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:39:27,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:28,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:28,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:28,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:28,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:28,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:28,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:28,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:28,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:28,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:28,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:28,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:28,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503153464] [2020-10-27 01:39:28,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:28,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:39:28,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145225570] [2020-10-27 01:39:28,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:39:28,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:39:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:39:28,030 INFO L87 Difference]: Start difference. First operand 741 states and 909 transitions. Second operand 33 states. [2020-10-27 01:39:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:28,385 INFO L93 Difference]: Finished difference Result 1656 states and 2058 transitions. [2020-10-27 01:39:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:39:28,385 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 102 [2020-10-27 01:39:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:28,388 INFO L225 Difference]: With dead ends: 1656 [2020-10-27 01:39:28,388 INFO L226 Difference]: Without dead ends: 921 [2020-10-27 01:39:28,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:39:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2020-10-27 01:39:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 780. [2020-10-27 01:39:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-27 01:39:28,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 961 transitions. [2020-10-27 01:39:28,446 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 961 transitions. Word has length 102 [2020-10-27 01:39:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:28,446 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 961 transitions. [2020-10-27 01:39:28,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:39:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 961 transitions. [2020-10-27 01:39:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 01:39:28,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:28,447 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:28,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:39:28,448 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1341153773, now seen corresponding path program 42 times [2020-10-27 01:39:28,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:28,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903742282] [2020-10-27 01:39:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:28,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:28,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:28,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:29,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:32,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:32,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:32,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:32,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:33,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:33,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 01:39:33,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 01:39:33,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4996 [2020-10-27 01:39:33,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:39:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:39:33,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:34,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:34,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:34,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1320 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:39:34,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903742282] [2020-10-27 01:39:34,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:34,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:39:34,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895887589] [2020-10-27 01:39:34,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:39:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:39:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:39:34,187 INFO L87 Difference]: Start difference. First operand 780 states and 961 transitions. Second operand 32 states. [2020-10-27 01:39:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:37,688 INFO L93 Difference]: Finished difference Result 1154 states and 1444 transitions. [2020-10-27 01:39:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-27 01:39:37,689 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 105 [2020-10-27 01:39:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:37,691 INFO L225 Difference]: With dead ends: 1154 [2020-10-27 01:39:37,692 INFO L226 Difference]: Without dead ends: 596 [2020-10-27 01:39:37,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3660, Invalid=9450, Unknown=0, NotChecked=0, Total=13110 [2020-10-27 01:39:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2020-10-27 01:39:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 551. [2020-10-27 01:39:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-27 01:39:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 703 transitions. [2020-10-27 01:39:37,739 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 703 transitions. Word has length 105 [2020-10-27 01:39:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:37,740 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 703 transitions. [2020-10-27 01:39:37,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:39:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 703 transitions. [2020-10-27 01:39:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 01:39:37,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:37,741 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 27, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:37,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:39:37,741 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash -810341419, now seen corresponding path program 43 times [2020-10-27 01:39:37,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:37,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870412816] [2020-10-27 01:39:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:37,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:40,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:40,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:40,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:41,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:41,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:42,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 01:39:42,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:39:42,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:39:42,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:39:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:39:42,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:43,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:43,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:43,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:43,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:43,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:43,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:39:43,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:43,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:43,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:43,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:43,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:43,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870412816] [2020-10-27 01:39:43,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:43,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:39:43,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291531536] [2020-10-27 01:39:43,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:39:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:39:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:39:43,641 INFO L87 Difference]: Start difference. First operand 551 states and 703 transitions. Second operand 35 states. [2020-10-27 01:39:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:47,544 INFO L93 Difference]: Finished difference Result 1309 states and 1672 transitions. [2020-10-27 01:39:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-27 01:39:47,545 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 105 [2020-10-27 01:39:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:47,548 INFO L225 Difference]: With dead ends: 1309 [2020-10-27 01:39:47,549 INFO L226 Difference]: Without dead ends: 758 [2020-10-27 01:39:47,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4485 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4470, Invalid=11532, Unknown=0, NotChecked=0, Total=16002 [2020-10-27 01:39:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-10-27 01:39:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 651. [2020-10-27 01:39:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2020-10-27 01:39:47,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 836 transitions. [2020-10-27 01:39:47,601 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 836 transitions. Word has length 105 [2020-10-27 01:39:47,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:47,601 INFO L481 AbstractCegarLoop]: Abstraction has 651 states and 836 transitions. [2020-10-27 01:39:47,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:39:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 836 transitions. [2020-10-27 01:39:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:39:47,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:47,604 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:47,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:39:47,605 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:47,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1038679949, now seen corresponding path program 44 times [2020-10-27 01:39:47,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:47,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557959743] [2020-10-27 01:39:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:47,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:48,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:39:48,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:39:48,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-27 01:39:48,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:48,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:39:48,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:48,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 01:39:48,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:49,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:49,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:49,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:49,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:49,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:49,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:49,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:49,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:49,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:49,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:49,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:49,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557959743] [2020-10-27 01:39:49,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:49,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:39:49,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60103680] [2020-10-27 01:39:49,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:39:49,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:39:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:39:49,613 INFO L87 Difference]: Start difference. First operand 651 states and 836 transitions. Second operand 35 states. [2020-10-27 01:39:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:50,121 INFO L93 Difference]: Finished difference Result 1467 states and 1906 transitions. [2020-10-27 01:39:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:39:50,122 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 108 [2020-10-27 01:39:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:50,126 INFO L225 Difference]: With dead ends: 1467 [2020-10-27 01:39:50,126 INFO L226 Difference]: Without dead ends: 822 [2020-10-27 01:39:50,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:39:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2020-10-27 01:39:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 707. [2020-10-27 01:39:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-10-27 01:39:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 908 transitions. [2020-10-27 01:39:50,184 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 908 transitions. Word has length 108 [2020-10-27 01:39:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:50,184 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 908 transitions. [2020-10-27 01:39:50,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:39:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 908 transitions. [2020-10-27 01:39:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 01:39:50,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:50,185 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:50,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:39:50,186 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1241779501, now seen corresponding path program 45 times [2020-10-27 01:39:50,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:50,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002193098] [2020-10-27 01:39:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:50,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:51,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:52,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 01:39:52,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:39:52,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2549 [2020-10-27 01:39:52,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:39:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 01:39:52,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:53,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:53,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:53,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:53,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002193098] [2020-10-27 01:39:53,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:53,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:39:53,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464453352] [2020-10-27 01:39:53,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:39:53,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:53,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:39:53,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:39:53,702 INFO L87 Difference]: Start difference. First operand 707 states and 908 transitions. Second operand 36 states. [2020-10-27 01:39:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:54,160 INFO L93 Difference]: Finished difference Result 1535 states and 1987 transitions. [2020-10-27 01:39:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:39:54,161 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 111 [2020-10-27 01:39:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:54,165 INFO L225 Difference]: With dead ends: 1535 [2020-10-27 01:39:54,166 INFO L226 Difference]: Without dead ends: 834 [2020-10-27 01:39:54,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:39:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2020-10-27 01:39:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 740. [2020-10-27 01:39:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-10-27 01:39:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 952 transitions. [2020-10-27 01:39:54,211 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 952 transitions. Word has length 111 [2020-10-27 01:39:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:54,211 INFO L481 AbstractCegarLoop]: Abstraction has 740 states and 952 transitions. [2020-10-27 01:39:54,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:39:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 952 transitions. [2020-10-27 01:39:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 01:39:54,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:54,212 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:54,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:39:54,213 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash -171613069, now seen corresponding path program 46 times [2020-10-27 01:39:54,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:54,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675319737] [2020-10-27 01:39:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:54,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:55,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:56,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:57,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:58,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:58,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 01:39:59,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:00,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:00,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:00,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:00,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:00,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:00,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:00,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:00,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:00,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:00,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:00,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1615 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:40:00,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675319737] [2020-10-27 01:40:00,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:00,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:40:00,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276078551] [2020-10-27 01:40:00,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:40:00,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:40:00,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:40:00,208 INFO L87 Difference]: Start difference. First operand 740 states and 952 transitions. Second operand 37 states. [2020-10-27 01:40:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:04,379 INFO L93 Difference]: Finished difference Result 1667 states and 2137 transitions. [2020-10-27 01:40:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-10-27 01:40:04,380 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 114 [2020-10-27 01:40:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:04,383 INFO L225 Difference]: With dead ends: 1667 [2020-10-27 01:40:04,383 INFO L226 Difference]: Without dead ends: 931 [2020-10-27 01:40:04,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5127 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5055, Invalid=13035, Unknown=0, NotChecked=0, Total=18090 [2020-10-27 01:40:04,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-10-27 01:40:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 730. [2020-10-27 01:40:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-10-27 01:40:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 938 transitions. [2020-10-27 01:40:04,427 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 938 transitions. Word has length 114 [2020-10-27 01:40:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:04,428 INFO L481 AbstractCegarLoop]: Abstraction has 730 states and 938 transitions. [2020-10-27 01:40:04,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:40:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 938 transitions. [2020-10-27 01:40:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 01:40:04,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:04,428 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:04,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:40:04,428 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1779487437, now seen corresponding path program 47 times [2020-10-27 01:40:04,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:04,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274979371] [2020-10-27 01:40:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:04,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:04,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:04,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:04,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:04,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:05,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:05,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 01:40:05,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:05,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1123 [2020-10-27 01:40:05,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:05,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:40:05,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:05,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 01:40:05,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:06,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:06,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:06,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:06,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274979371] [2020-10-27 01:40:06,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:06,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:40:06,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500812350] [2020-10-27 01:40:06,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:40:06,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:06,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:40:06,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:40:06,544 INFO L87 Difference]: Start difference. First operand 730 states and 938 transitions. Second operand 37 states. [2020-10-27 01:40:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:06,910 INFO L93 Difference]: Finished difference Result 1579 states and 2043 transitions. [2020-10-27 01:40:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:40:06,910 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 114 [2020-10-27 01:40:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:06,914 INFO L225 Difference]: With dead ends: 1579 [2020-10-27 01:40:06,914 INFO L226 Difference]: Without dead ends: 855 [2020-10-27 01:40:06,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:40:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-27 01:40:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 761. [2020-10-27 01:40:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2020-10-27 01:40:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 978 transitions. [2020-10-27 01:40:06,962 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 978 transitions. Word has length 114 [2020-10-27 01:40:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:06,962 INFO L481 AbstractCegarLoop]: Abstraction has 761 states and 978 transitions. [2020-10-27 01:40:06,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:40:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 978 transitions. [2020-10-27 01:40:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 01:40:06,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:06,963 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:06,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:40:06,963 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1199279635, now seen corresponding path program 48 times [2020-10-27 01:40:06,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:06,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384922688] [2020-10-27 01:40:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:06,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:07,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:08,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:09,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:09,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:09,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 01:40:09,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:40:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2911 [2020-10-27 01:40:09,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:40:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 01:40:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:10,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:10,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:10,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:11,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384922688] [2020-10-27 01:40:11,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:11,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:40:11,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977455440] [2020-10-27 01:40:11,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:40:11,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:40:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:40:11,002 INFO L87 Difference]: Start difference. First operand 761 states and 978 transitions. Second operand 39 states. [2020-10-27 01:40:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:13,178 INFO L93 Difference]: Finished difference Result 1825 states and 2330 transitions. [2020-10-27 01:40:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-27 01:40:13,179 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 117 [2020-10-27 01:40:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:13,183 INFO L225 Difference]: With dead ends: 1825 [2020-10-27 01:40:13,183 INFO L226 Difference]: Without dead ends: 948 [2020-10-27 01:40:13,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1902, Invalid=3648, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:40:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-10-27 01:40:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 576. [2020-10-27 01:40:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-10-27 01:40:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 730 transitions. [2020-10-27 01:40:13,236 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 730 transitions. Word has length 117 [2020-10-27 01:40:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:13,239 INFO L481 AbstractCegarLoop]: Abstraction has 576 states and 730 transitions. [2020-10-27 01:40:13,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:40:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 730 transitions. [2020-10-27 01:40:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:40:13,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:13,240 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:13,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:40:13,241 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1721944563, now seen corresponding path program 49 times [2020-10-27 01:40:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:13,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735874095] [2020-10-27 01:40:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:13,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:13,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:13,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:14,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:14,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:40:14,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:14,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1159 [2020-10-27 01:40:14,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:14,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:40:14,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:14,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 01:40:14,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:15,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:15,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:15,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:15,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:15,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:15,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:15,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:15,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:15,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:15,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735874095] [2020-10-27 01:40:15,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:15,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:40:15,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345848649] [2020-10-27 01:40:15,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:40:15,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:15,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:40:15,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:40:15,558 INFO L87 Difference]: Start difference. First operand 576 states and 730 transitions. Second operand 39 states. [2020-10-27 01:40:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:16,098 INFO L93 Difference]: Finished difference Result 1249 states and 1597 transitions. [2020-10-27 01:40:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:40:16,099 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 120 [2020-10-27 01:40:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:16,101 INFO L225 Difference]: With dead ends: 1249 [2020-10-27 01:40:16,102 INFO L226 Difference]: Without dead ends: 679 [2020-10-27 01:40:16,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:40:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-10-27 01:40:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 608. [2020-10-27 01:40:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-10-27 01:40:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 770 transitions. [2020-10-27 01:40:16,147 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 770 transitions. Word has length 120 [2020-10-27 01:40:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:16,147 INFO L481 AbstractCegarLoop]: Abstraction has 608 states and 770 transitions. [2020-10-27 01:40:16,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:40:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 770 transitions. [2020-10-27 01:40:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 01:40:16,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:16,148 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:16,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:40:16,148 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash 489273683, now seen corresponding path program 50 times [2020-10-27 01:40:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439949390] [2020-10-27 01:40:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:16,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:17,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:19,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:19,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 01:40:19,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:40:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3150 [2020-10-27 01:40:19,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:40:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 01:40:19,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:20,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:20,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:20,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:20,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:20,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:20,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:20,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:20,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:20,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1924 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:40:20,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439949390] [2020-10-27 01:40:20,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:20,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:40:20,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520789401] [2020-10-27 01:40:20,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:40:20,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:40:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:40:20,425 INFO L87 Difference]: Start difference. First operand 608 states and 770 transitions. Second operand 40 states. [2020-10-27 01:40:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:22,490 INFO L93 Difference]: Finished difference Result 1476 states and 1852 transitions. [2020-10-27 01:40:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-27 01:40:22,490 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 123 [2020-10-27 01:40:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:22,493 INFO L225 Difference]: With dead ends: 1476 [2020-10-27 01:40:22,494 INFO L226 Difference]: Without dead ends: 749 [2020-10-27 01:40:22,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2010, Invalid=3842, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:40:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-10-27 01:40:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 604. [2020-10-27 01:40:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2020-10-27 01:40:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 765 transitions. [2020-10-27 01:40:22,540 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 765 transitions. Word has length 123 [2020-10-27 01:40:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:22,540 INFO L481 AbstractCegarLoop]: Abstraction has 604 states and 765 transitions. [2020-10-27 01:40:22,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:40:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 765 transitions. [2020-10-27 01:40:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 01:40:22,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:22,541 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:22,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:40:22,541 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash -97532331, now seen corresponding path program 51 times [2020-10-27 01:40:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:22,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815214963] [2020-10-27 01:40:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:23,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 01:40:23,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:40:23,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-27 01:40:23,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:40:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:23,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 01:40:23,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:25,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:25,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:25,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:25,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:25,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:25,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:25,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:25,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:25,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:25,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:25,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815214963] [2020-10-27 01:40:25,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:25,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:40:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389607891] [2020-10-27 01:40:25,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:40:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:25,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:40:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:40:25,068 INFO L87 Difference]: Start difference. First operand 604 states and 765 transitions. Second operand 40 states. [2020-10-27 01:40:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:25,643 INFO L93 Difference]: Finished difference Result 1279 states and 1630 transitions. [2020-10-27 01:40:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:40:25,644 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 123 [2020-10-27 01:40:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:25,646 INFO L225 Difference]: With dead ends: 1279 [2020-10-27 01:40:25,647 INFO L226 Difference]: Without dead ends: 681 [2020-10-27 01:40:25,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:40:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2020-10-27 01:40:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 623. [2020-10-27 01:40:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-10-27 01:40:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 789 transitions. [2020-10-27 01:40:25,692 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 789 transitions. Word has length 123 [2020-10-27 01:40:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:25,692 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 789 transitions. [2020-10-27 01:40:25,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:40:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 789 transitions. [2020-10-27 01:40:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 01:40:25,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:25,693 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:25,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:40:25,693 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:25,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1059599951, now seen corresponding path program 52 times [2020-10-27 01:40:25,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:25,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602344624] [2020-10-27 01:40:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:28,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 01:40:28,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:40:28,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3215 [2020-10-27 01:40:28,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:28,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:40:28,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:28,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 01:40:28,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:30,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:30,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:30,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:30,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:30,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:30,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:30,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:30,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:30,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:30,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:30,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602344624] [2020-10-27 01:40:30,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:30,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:40:30,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478843276] [2020-10-27 01:40:30,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:40:30,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:40:30,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:40:30,202 INFO L87 Difference]: Start difference. First operand 623 states and 789 transitions. Second operand 41 states. [2020-10-27 01:40:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:30,656 INFO L93 Difference]: Finished difference Result 1319 states and 1682 transitions. [2020-10-27 01:40:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:40:30,657 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 126 [2020-10-27 01:40:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:30,659 INFO L225 Difference]: With dead ends: 1319 [2020-10-27 01:40:30,659 INFO L226 Difference]: Without dead ends: 702 [2020-10-27 01:40:30,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:40:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-10-27 01:40:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 644. [2020-10-27 01:40:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-10-27 01:40:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 817 transitions. [2020-10-27 01:40:30,711 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 817 transitions. Word has length 126 [2020-10-27 01:40:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:30,711 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 817 transitions. [2020-10-27 01:40:30,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:40:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 817 transitions. [2020-10-27 01:40:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 01:40:30,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:30,712 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:30,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:40:30,712 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1699301163, now seen corresponding path program 53 times [2020-10-27 01:40:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:30,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399165032] [2020-10-27 01:40:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:30,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:35,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:35,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:35,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 01:40:35,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:40:35,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:40:35,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:40:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 01:40:35,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:36,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:36,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:36,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:36,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:36,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:36,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:40:36,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:36,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:36,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:36,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:36,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2144 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:40:36,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399165032] [2020-10-27 01:40:36,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:36,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:40:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925621275] [2020-10-27 01:40:36,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:40:36,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:36,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:40:36,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:40:36,999 INFO L87 Difference]: Start difference. First operand 644 states and 817 transitions. Second operand 41 states.