/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 10:01:45,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 10:01:45,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 10:01:45,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 10:01:45,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 10:01:45,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 10:01:45,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 10:01:45,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 10:01:45,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 10:01:45,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 10:01:45,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 10:01:45,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 10:01:45,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 10:01:45,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 10:01:45,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 10:01:45,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 10:01:45,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 10:01:45,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 10:01:45,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 10:01:45,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 10:01:45,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 10:01:45,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 10:01:45,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 10:01:45,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 10:01:45,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 10:01:45,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 10:01:45,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 10:01:45,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 10:01:45,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 10:01:45,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 10:01:45,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 10:01:45,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 10:01:45,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 10:01:45,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 10:01:45,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 10:01:45,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 10:01:45,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 10:01:45,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 10:01:45,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 10:01:45,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 10:01:45,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 10:01:45,792 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 [2020-10-29 10:01:45,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 10:01:45,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 10:01:45,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 10:01:45,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 10:01:45,826 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 10:01:45,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 10:01:45,826 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 10:01:45,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 10:01:45,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 10:01:45,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 10:01:45,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 10:01:45,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 10:01:45,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 10:01:45,828 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 10:01:45,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 10:01:45,828 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 10:01:45,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 10:01:45,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 10:01:45,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 10:01:45,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 10:01:45,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 10:01:45,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 10:01:45,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 10:01:45,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 10:01:45,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 10:01:45,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 10:01:45,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 10:01:45,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 10:01:45,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 10:01:45,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 10:01:46,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 10:01:46,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 10:01:46,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 10:01:46,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 10:01:46,278 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 10:01:46,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2020-10-29 10:01:46,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f133845a0/25afe3f562a940208f4554599d630caf/FLAGa5d254635 [2020-10-29 10:01:47,011 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 10:01:47,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-1.i [2020-10-29 10:01:47,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f133845a0/25afe3f562a940208f4554599d630caf/FLAGa5d254635 [2020-10-29 10:01:47,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f133845a0/25afe3f562a940208f4554599d630caf [2020-10-29 10:01:47,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 10:01:47,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 10:01:47,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 10:01:47,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 10:01:47,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 10:01:47,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ce89df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47, skipping insertion in model container [2020-10-29 10:01:47,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 10:01:47,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 10:01:47,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:01:47,601 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 10:01:47,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:01:47,659 INFO L208 MainTranslator]: Completed translation [2020-10-29 10:01:47,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47 WrapperNode [2020-10-29 10:01:47,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 10:01:47,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 10:01:47,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 10:01:47,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 10:01:47,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (1/1) ... [2020-10-29 10:01:47,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 10:01:47,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 10:01:47,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 10:01:47,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 10:01:47,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (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 [2020-10-29 10:01:47,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 10:01:47,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 10:01:47,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 10:01:47,822 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 10:01:47,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 10:01:47,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 10:01:47,824 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 10:01:47,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 10:01:47,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 10:01:47,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 10:01:47,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 10:01:47,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 10:01:47,827 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 10:01:47,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 10:01:47,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 10:01:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 10:01:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 10:01:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 10:01:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 10:01:47,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 10:01:47,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 10:01:47,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 10:01:48,518 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 10:01:48,518 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-29 10:01:48,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:01:48 BoogieIcfgContainer [2020-10-29 10:01:48,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 10:01:48,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 10:01:48,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 10:01:48,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 10:01:48,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 10:01:47" (1/3) ... [2020-10-29 10:01:48,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddc6978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:01:48, skipping insertion in model container [2020-10-29 10:01:48,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:47" (2/3) ... [2020-10-29 10:01:48,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddc6978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:01:48, skipping insertion in model container [2020-10-29 10:01:48,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:01:48" (3/3) ... [2020-10-29 10:01:48,530 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2020-10-29 10:01:48,543 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 10:01:48,549 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 10:01:48,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 10:01:48,591 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 10:01:48,591 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 10:01:48,592 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 10:01:48,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 10:01:48,592 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 10:01:48,592 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 10:01:48,592 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 10:01:48,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 10:01:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-29 10:01:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 10:01:48,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:48,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:48,620 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:48,627 INFO L82 PathProgramCache]: Analyzing trace with hash 620530695, now seen corresponding path program 1 times [2020-10-29 10:01:48,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:48,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841148573] [2020-10-29 10:01:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:48,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:48,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:49,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:49,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:49,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 10:01:49,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 10:01:49,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1120 [2020-10-29 10:01:49,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:49,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 10:01:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:01:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 10:01:49,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 10:01:50,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:50,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:50,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:50,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:50,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:50,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 10:01:50,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:50,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:50,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:50,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:50,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:50,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:50,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841148573] [2020-10-29 10:01:50,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:01:50,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 10:01:50,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708589117] [2020-10-29 10:01:50,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 10:01:50,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:50,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 10:01:50,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 10:01:50,162 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 7 states. [2020-10-29 10:01:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:50,551 INFO L93 Difference]: Finished difference Result 103 states and 154 transitions. [2020-10-29 10:01:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:01:50,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-29 10:01:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:50,563 INFO L225 Difference]: With dead ends: 103 [2020-10-29 10:01:50,564 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 10:01:50,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:01:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 10:01:50,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-10-29 10:01:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 10:01:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-10-29 10:01:50,615 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-10-29 10:01:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:50,616 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-10-29 10:01:50,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 10:01:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-10-29 10:01:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 10:01:50,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:50,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:50,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 10:01:50,619 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:50,620 INFO L82 PathProgramCache]: Analyzing trace with hash 125013462, now seen corresponding path program 1 times [2020-10-29 10:01:50,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:50,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843624847] [2020-10-29 10:01:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:50,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:50,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:50,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:51,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:52,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:52,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 10:01:52,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:01:52,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1691 [2020-10-29 10:01:52,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:52,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 10:01:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:52,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 10:01:52,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 10:01:52,860 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 23 [2020-10-29 10:01:52,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:52,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:52,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:52,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:52,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:52,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 10:01:52,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:52,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:52,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:52,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843624847] [2020-10-29 10:01:52,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:52,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 10:01:52,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985617174] [2020-10-29 10:01:52,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 10:01:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 10:01:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:01:52,933 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 9 states. [2020-10-29 10:01:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:53,101 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2020-10-29 10:01:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 10:01:53,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-29 10:01:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:53,103 INFO L225 Difference]: With dead ends: 81 [2020-10-29 10:01:53,103 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 10:01:53,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:01:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 10:01:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 10:01:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 10:01:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-10-29 10:01:53,115 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 28 [2020-10-29 10:01:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:53,115 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-10-29 10:01:53,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 10:01:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-10-29 10:01:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 10:01:53,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:53,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:53,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 10:01:53,118 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 518342904, now seen corresponding path program 1 times [2020-10-29 10:01:53,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:53,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238004765] [2020-10-29 10:01:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:53,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:53,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:53,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:53,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:58,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:58,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 10:01:58,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:01:58,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 10:01:58,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:58,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:58,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:01:58,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:58,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:01:58,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-10-29 10:01:58,544 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2020-10-29 10:01:58,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:58,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:58,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:58,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:58,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:58,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 10:01:58,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:58,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:58,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:58,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:58,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:58,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:58,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238004765] [2020-10-29 10:01:58,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:58,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:01:58,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119859919] [2020-10-29 10:01:58,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:01:58,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:01:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:01:58,784 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 10 states. [2020-10-29 10:01:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:59,422 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2020-10-29 10:01:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:01:59,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 10:01:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:59,425 INFO L225 Difference]: With dead ends: 126 [2020-10-29 10:01:59,425 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 10:01:59,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:01:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 10:01:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 64. [2020-10-29 10:01:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 10:01:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-10-29 10:01:59,439 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 30 [2020-10-29 10:01:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:59,440 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-10-29 10:01:59,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:01:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-10-29 10:01:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 10:01:59,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:59,441 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:59,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 10:01:59,442 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:59,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1938378883, now seen corresponding path program 1 times [2020-10-29 10:01:59,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:59,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240565669] [2020-10-29 10:01:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:59,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:59,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:59,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:00,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:00,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:04,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:04,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 10:02:04,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 10:02:04,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 10:02:04,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:04,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:02:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 10:02:04,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 10:02:04,868 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-10-29 10:02:05,233 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2020-10-29 10:02:05,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:05,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:02:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:05,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:05,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:02:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:02:05,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240565669] [2020-10-29 10:02:05,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:05,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:02:05,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968285516] [2020-10-29 10:02:05,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:02:05,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:05,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:02:05,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:02:05,320 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 10 states. [2020-10-29 10:02:05,807 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-10-29 10:02:06,084 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-10-29 10:02:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:06,215 INFO L93 Difference]: Finished difference Result 161 states and 219 transitions. [2020-10-29 10:02:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:02:06,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-29 10:02:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:06,218 INFO L225 Difference]: With dead ends: 161 [2020-10-29 10:02:06,218 INFO L226 Difference]: Without dead ends: 148 [2020-10-29 10:02:06,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-29 10:02:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-29 10:02:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2020-10-29 10:02:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 10:02:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2020-10-29 10:02:06,238 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 31 [2020-10-29 10:02:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:06,239 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2020-10-29 10:02:06,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:02:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2020-10-29 10:02:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 10:02:06,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:06,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:06,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 10:02:06,241 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:06,242 INFO L82 PathProgramCache]: Analyzing trace with hash 550814618, now seen corresponding path program 2 times [2020-10-29 10:02:06,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:06,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598892123] [2020-10-29 10:02:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:06,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:06,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:06,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:06,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:11,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:11,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 10:02:11,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:02:11,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 10:02:11,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:11,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:11,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:02:11,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:11,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 10:02:11,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:02:11,545 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 21 [2020-10-29 10:02:11,754 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-29 10:02:11,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:11,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:11,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:11,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:11,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:02:11,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:11,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:11,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:11,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:11,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:11,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:02:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 10:02:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598892123] [2020-10-29 10:02:11,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:11,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:02:11,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170808116] [2020-10-29 10:02:11,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:02:11,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:02:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:02:11,828 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand 10 states. [2020-10-29 10:02:12,327 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-29 10:02:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:12,634 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2020-10-29 10:02:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:02:12,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-29 10:02:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:12,636 INFO L225 Difference]: With dead ends: 163 [2020-10-29 10:02:12,636 INFO L226 Difference]: Without dead ends: 156 [2020-10-29 10:02:12,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-29 10:02:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-29 10:02:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2020-10-29 10:02:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 10:02:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 133 transitions. [2020-10-29 10:02:12,656 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 133 transitions. Word has length 32 [2020-10-29 10:02:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:12,656 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 133 transitions. [2020-10-29 10:02:12,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:02:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 133 transitions. [2020-10-29 10:02:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 10:02:12,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:12,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:12,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 10:02:12,659 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash 846091520, now seen corresponding path program 3 times [2020-10-29 10:02:12,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:12,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114270596] [2020-10-29 10:02:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:12,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:12,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:12,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:12,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:13,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:13,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 10:02:13,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:02:13,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-29 10:02:13,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:13,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 10:02:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:02:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 10:02:13,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:13,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:13,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:13,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:13,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:13,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:13,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:02:13,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:13,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:13,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:13,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:02:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 10:02:13,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114270596] [2020-10-29 10:02:13,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:02:13,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 10:02:13,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326507082] [2020-10-29 10:02:13,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 10:02:13,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:13,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 10:02:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 10:02:13,594 INFO L87 Difference]: Start difference. First operand 98 states and 133 transitions. Second operand 4 states. [2020-10-29 10:02:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:13,710 INFO L93 Difference]: Finished difference Result 164 states and 222 transitions. [2020-10-29 10:02:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 10:02:13,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-29 10:02:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:13,712 INFO L225 Difference]: With dead ends: 164 [2020-10-29 10:02:13,712 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 10:02:13,714 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 [2020-10-29 10:02:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 10:02:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-10-29 10:02:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 10:02:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2020-10-29 10:02:13,745 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 33 [2020-10-29 10:02:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:13,748 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2020-10-29 10:02:13,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 10:02:13,749 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2020-10-29 10:02:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 10:02:13,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:13,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:13,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 10:02:13,754 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:13,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:13,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1662812226, now seen corresponding path program 1 times [2020-10-29 10:02:13,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:13,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657820240] [2020-10-29 10:02:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:13,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:13,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:13,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:13,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:14,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:18,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:18,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 10:02:18,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:02:18,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 10:02:18,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:18,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:02:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 10:02:18,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:02:19,153 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2020-10-29 10:02:19,407 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 39 [2020-10-29 10:02:19,700 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 47 [2020-10-29 10:02:19,876 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-29 10:02:19,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:19,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:19,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:19,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:19,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:02:19,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:19,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:19,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:19,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:19,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:19,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 10:02:19,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657820240] [2020-10-29 10:02:19,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:19,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:02:19,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794335951] [2020-10-29 10:02:19,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:02:19,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:02:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:02:19,963 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand 11 states. [2020-10-29 10:02:20,420 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-29 10:02:20,605 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-10-29 10:02:20,795 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-29 10:02:20,981 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-29 10:02:21,162 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-29 10:02:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:21,467 INFO L93 Difference]: Finished difference Result 126 states and 164 transitions. [2020-10-29 10:02:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:02:21,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-29 10:02:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:21,470 INFO L225 Difference]: With dead ends: 126 [2020-10-29 10:02:21,471 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 10:02:21,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-29 10:02:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 10:02:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 67. [2020-10-29 10:02:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 10:02:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2020-10-29 10:02:21,489 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 33 [2020-10-29 10:02:21,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:21,490 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2020-10-29 10:02:21,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:02:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2020-10-29 10:02:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 10:02:21,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:21,491 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:21,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 10:02:21,492 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:21,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1355769909, now seen corresponding path program 2 times [2020-10-29 10:02:21,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:21,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122900465] [2020-10-29 10:02:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:21,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:21,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:21,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:21,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:21,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:24,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:24,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 10:02:24,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:02:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3419 [2020-10-29 10:02:24,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:24,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 10:02:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:02:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 10:02:24,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:25,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:25,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:25,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:25,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:25,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:25,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 10:02:25,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:25,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:25,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:25,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:25,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:25,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 10:02:25,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122900465] [2020-10-29 10:02:25,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:02:25,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 10:02:25,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120900131] [2020-10-29 10:02:25,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 10:02:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 10:02:25,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:02:25,169 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 8 states. [2020-10-29 10:02:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:25,409 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2020-10-29 10:02:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:02:25,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-29 10:02:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:25,411 INFO L225 Difference]: With dead ends: 92 [2020-10-29 10:02:25,411 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 10:02:25,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:02:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 10:02:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-29 10:02:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 10:02:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2020-10-29 10:02:25,428 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 35 [2020-10-29 10:02:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:25,429 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2020-10-29 10:02:25,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 10:02:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2020-10-29 10:02:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 10:02:25,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:25,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:25,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 10:02:25,434 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash -152893307, now seen corresponding path program 1 times [2020-10-29 10:02:25,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:25,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773345049] [2020-10-29 10:02:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:25,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:25,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:25,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:25,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:25,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:25,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:26,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:30,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:30,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 10:02:30,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 10:02:30,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 10:02:30,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:30,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:30,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 10:02:30,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:02:30,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:02:30,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:30,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:30,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:30,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:30,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:30,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:30,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:30,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:30,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:30,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 10:02:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773345049] [2020-10-29 10:02:30,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:30,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 10:02:30,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442080171] [2020-10-29 10:02:30,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 10:02:30,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 10:02:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:02:30,690 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 8 states. [2020-10-29 10:02:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:30,937 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2020-10-29 10:02:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:02:30,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-29 10:02:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:30,939 INFO L225 Difference]: With dead ends: 89 [2020-10-29 10:02:30,939 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 10:02:30,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:02:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 10:02:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2020-10-29 10:02:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 10:02:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-29 10:02:30,952 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 35 [2020-10-29 10:02:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:30,952 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-29 10:02:30,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 10:02:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-29 10:02:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 10:02:30,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:30,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:30,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 10:02:30,954 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:30,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2016541435, now seen corresponding path program 1 times [2020-10-29 10:02:30,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:30,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609275205] [2020-10-29 10:02:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:30,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:30,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:31,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 10:02:31,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 10:02:31,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-29 10:02:31,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:31,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:31,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 10:02:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 10:02:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 10:02:31,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:31,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:31,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:31,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:31,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:31,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:31,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:31,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:31,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:31,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:31,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:31,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 10:02:31,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609275205] [2020-10-29 10:02:31,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:31,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 10:02:31,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401784053] [2020-10-29 10:02:31,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 10:02:31,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 10:02:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 10:02:31,588 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 5 states. [2020-10-29 10:02:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:31,710 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2020-10-29 10:02:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 10:02:31,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-29 10:02:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:31,712 INFO L225 Difference]: With dead ends: 119 [2020-10-29 10:02:31,712 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 10:02:31,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 10:02:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 10:02:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-29 10:02:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 10:02:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2020-10-29 10:02:31,729 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 36 [2020-10-29 10:02:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:31,729 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2020-10-29 10:02:31,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 10:02:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2020-10-29 10:02:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 10:02:31,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:31,730 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:31,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 10:02:31,731 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:31,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1365316482, now seen corresponding path program 1 times [2020-10-29 10:02:31,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:31,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865081953] [2020-10-29 10:02:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:31,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:31,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:33,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:35,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:36,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:36,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 10:02:36,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 10:02:36,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 10:02:36,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:36,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 10:02:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:02:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 10:02:36,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:37,020 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2020-10-29 10:02:37,166 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 43 [2020-10-29 10:02:37,349 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2020-10-29 10:02:37,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:37,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:37,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:37,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:37,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:02:37,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:37,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:37,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:37,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:37,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:37,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 10:02:37,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865081953] [2020-10-29 10:02:37,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:37,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 10:02:37,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664596676] [2020-10-29 10:02:37,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 10:02:37,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:37,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 10:02:37,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:02:37,431 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 9 states. [2020-10-29 10:02:38,133 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-29 10:02:38,268 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-29 10:02:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:38,348 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-10-29 10:02:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 10:02:38,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-29 10:02:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:38,350 INFO L225 Difference]: With dead ends: 99 [2020-10-29 10:02:38,350 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 10:02:38,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:02:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 10:02:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-29 10:02:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 10:02:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2020-10-29 10:02:38,396 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 45 [2020-10-29 10:02:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:38,397 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2020-10-29 10:02:38,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 10:02:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2020-10-29 10:02:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 10:02:38,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:38,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:38,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 10:02:38,399 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1107151044, now seen corresponding path program 1 times [2020-10-29 10:02:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:38,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900061870] [2020-10-29 10:02:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:38,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:38,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:38,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:39,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:39,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:39,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:39,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:39,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:41,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:41,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:42,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:42,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:42,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:42,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:42,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:42,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:42,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:43,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:43,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 10:02:43,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 10:02:43,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 10:02:43,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:43,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:02:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 10:02:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:02:43,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:43,624 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2020-10-29 10:02:43,778 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 30 [2020-10-29 10:02:43,929 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2020-10-29 10:02:44,161 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-29 10:02:44,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:44,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:44,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:44,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:44,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:44,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:44,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:44,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:44,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 10:02:44,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900061870] [2020-10-29 10:02:44,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:44,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:02:44,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418676657] [2020-10-29 10:02:44,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:02:44,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:44,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:02:44,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:02:44,275 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 11 states. [2020-10-29 10:02:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:45,376 INFO L93 Difference]: Finished difference Result 178 states and 226 transitions. [2020-10-29 10:02:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 10:02:45,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-29 10:02:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:45,378 INFO L225 Difference]: With dead ends: 178 [2020-10-29 10:02:45,378 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 10:02:45,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-10-29 10:02:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 10:02:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2020-10-29 10:02:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 10:02:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2020-10-29 10:02:45,402 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 45 [2020-10-29 10:02:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:45,403 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2020-10-29 10:02:45,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:02:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2020-10-29 10:02:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 10:02:45,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:45,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:45,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 10:02:45,404 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1241164550, now seen corresponding path program 1 times [2020-10-29 10:02:45,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:45,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454432001] [2020-10-29 10:02:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:45,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:45,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:45,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:45,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 10:02:45,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:02:45,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-29 10:02:45,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:45,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 10:02:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 10:02:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 10:02:45,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:46,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:46,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:46,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:46,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:46,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:46,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:46,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:46,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 10:02:46,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454432001] [2020-10-29 10:02:46,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:46,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 10:02:46,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603102001] [2020-10-29 10:02:46,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 10:02:46,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:46,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 10:02:46,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:02:46,100 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand 9 states. [2020-10-29 10:02:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:46,522 INFO L93 Difference]: Finished difference Result 179 states and 229 transitions. [2020-10-29 10:02:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:02:46,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-29 10:02:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:46,524 INFO L225 Difference]: With dead ends: 179 [2020-10-29 10:02:46,525 INFO L226 Difference]: Without dead ends: 172 [2020-10-29 10:02:46,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:02:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-29 10:02:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2020-10-29 10:02:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 10:02:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2020-10-29 10:02:46,553 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 45 [2020-10-29 10:02:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:46,553 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2020-10-29 10:02:46,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 10:02:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2020-10-29 10:02:46,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 10:02:46,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:46,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:46,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 10:02:46,555 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1773939068, now seen corresponding path program 1 times [2020-10-29 10:02:46,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:46,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104495885] [2020-10-29 10:02:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:46,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:46,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:46,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:46,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:46,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:46,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:47,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:51,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:51,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 10:02:51,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 10:02:51,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 10:02:51,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:51,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:02:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 10:02:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:02:51,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:51,906 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-29 10:02:52,172 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2020-10-29 10:02:52,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:52,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:52,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:52,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:52,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:52,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:52,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:52,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:52,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 10:02:52,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104495885] [2020-10-29 10:02:52,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:52,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:02:52,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445439994] [2020-10-29 10:02:52,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:02:52,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:02:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:02:52,241 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand 11 states. [2020-10-29 10:02:53,069 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-29 10:02:53,397 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-10-29 10:02:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:53,548 INFO L93 Difference]: Finished difference Result 289 states and 372 transitions. [2020-10-29 10:02:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 10:02:53,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-29 10:02:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:53,552 INFO L225 Difference]: With dead ends: 289 [2020-10-29 10:02:53,552 INFO L226 Difference]: Without dead ends: 240 [2020-10-29 10:02:53,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-29 10:02:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-29 10:02:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 172. [2020-10-29 10:02:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-29 10:02:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 220 transitions. [2020-10-29 10:02:53,587 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 220 transitions. Word has length 45 [2020-10-29 10:02:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:02:53,588 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 220 transitions. [2020-10-29 10:02:53,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:02:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 220 transitions. [2020-10-29 10:02:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 10:02:53,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:02:53,589 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:02:53,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 10:02:53,589 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:02:53,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:02:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash 682063484, now seen corresponding path program 1 times [2020-10-29 10:02:53,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:02:53,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181699872] [2020-10-29 10:02:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:02:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:53,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:53,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:53,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:53,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:53,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:54,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:54,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:54,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:55,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:55,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:56,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:56,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:58,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 10:02:58,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:58,960 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-10-29 10:02:59,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:02:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:02:59,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:02:59,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:02:59,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:02:59,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:02:59,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:02:59,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:02:59,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:02:59,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:02:59,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:02:59,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:02:59,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:02:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 10:02:59,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181699872] [2020-10-29 10:02:59,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:02:59,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:02:59,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652885519] [2020-10-29 10:02:59,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:02:59,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:02:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:02:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:02:59,037 INFO L87 Difference]: Start difference. First operand 172 states and 220 transitions. Second operand 11 states. [2020-10-29 10:02:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:02:59,983 INFO L93 Difference]: Finished difference Result 537 states and 694 transitions. [2020-10-29 10:02:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 10:02:59,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-29 10:02:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:02:59,991 INFO L225 Difference]: With dead ends: 537 [2020-10-29 10:02:59,991 INFO L226 Difference]: Without dead ends: 437 [2020-10-29 10:02:59,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-29 10:02:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-29 10:03:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 290. [2020-10-29 10:03:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-29 10:03:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 375 transitions. [2020-10-29 10:03:00,066 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 375 transitions. Word has length 45 [2020-10-29 10:03:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:00,066 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 375 transitions. [2020-10-29 10:03:00,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:03:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 375 transitions. [2020-10-29 10:03:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 10:03:00,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:00,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:00,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 10:03:00,067 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:00,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:00,068 INFO L82 PathProgramCache]: Analyzing trace with hash -855965632, now seen corresponding path program 2 times [2020-10-29 10:03:00,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:00,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958718390] [2020-10-29 10:03:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:00,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:00,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:01,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:01,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:01,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:01,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:02,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:03,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:03,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:05,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:05,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 10:03:05,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-29 10:03:05,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 10:03:05,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:05,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:05,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:03:05,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 10:03:05,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:03:05,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:05,609 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-29 10:03:05,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:05,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:05,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:05,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:05,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:05,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:05,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 10:03:05,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958718390] [2020-10-29 10:03:05,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:05,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:03:05,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141212386] [2020-10-29 10:03:05,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:03:05,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:05,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:03:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:03:05,685 INFO L87 Difference]: Start difference. First operand 290 states and 375 transitions. Second operand 11 states. [2020-10-29 10:03:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:06,892 INFO L93 Difference]: Finished difference Result 609 states and 793 transitions. [2020-10-29 10:03:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 10:03:06,893 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-29 10:03:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:06,896 INFO L225 Difference]: With dead ends: 609 [2020-10-29 10:03:06,896 INFO L226 Difference]: Without dead ends: 359 [2020-10-29 10:03:06,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-10-29 10:03:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-29 10:03:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 282. [2020-10-29 10:03:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-29 10:03:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 362 transitions. [2020-10-29 10:03:06,959 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 362 transitions. Word has length 45 [2020-10-29 10:03:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:06,959 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 362 transitions. [2020-10-29 10:03:06,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:03:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 362 transitions. [2020-10-29 10:03:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 10:03:06,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:06,960 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:06,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 10:03:06,961 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:06,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1439076252, now seen corresponding path program 1 times [2020-10-29 10:03:06,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:06,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511386384] [2020-10-29 10:03:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:06,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:07,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:07,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:07,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:07,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:11,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:11,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 10:03:11,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:03:11,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 10:03:11,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:11,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:03:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:03:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 10:03:11,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:12,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:12,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:12,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:12,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:12,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:12,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:12,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:12,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:12,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:12,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:12,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:12,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 10:03:12,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511386384] [2020-10-29 10:03:12,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:12,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:03:12,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077787137] [2020-10-29 10:03:12,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:03:12,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:12,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:03:12,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:03:12,283 INFO L87 Difference]: Start difference. First operand 282 states and 362 transitions. Second operand 10 states. [2020-10-29 10:03:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:12,850 INFO L93 Difference]: Finished difference Result 408 states and 509 transitions. [2020-10-29 10:03:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 10:03:12,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-29 10:03:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:12,853 INFO L225 Difference]: With dead ends: 408 [2020-10-29 10:03:12,853 INFO L226 Difference]: Without dead ends: 323 [2020-10-29 10:03:12,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-29 10:03:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-29 10:03:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 296. [2020-10-29 10:03:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-29 10:03:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 372 transitions. [2020-10-29 10:03:12,921 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 372 transitions. Word has length 46 [2020-10-29 10:03:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:12,921 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 372 transitions. [2020-10-29 10:03:12,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:03:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 372 transitions. [2020-10-29 10:03:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 10:03:12,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:12,923 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:12,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 10:03:12,923 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:12,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1698024485, now seen corresponding path program 2 times [2020-10-29 10:03:12,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:12,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100604192] [2020-10-29 10:03:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:12,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:12,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:12,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:13,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:14,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:14,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:14,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:14,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:14,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:15,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:15,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:15,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:15,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:17,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:17,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:17,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 10:03:17,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 10:03:17,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 10:03:17,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:17,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:17,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:03:17,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 10:03:17,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 10:03:17,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:18,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:18,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:18,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:18,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:18,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:18,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:18,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:18,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:18,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 10:03:18,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100604192] [2020-10-29 10:03:18,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:18,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 10:03:18,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835200895] [2020-10-29 10:03:18,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 10:03:18,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:18,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 10:03:18,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:03:18,592 INFO L87 Difference]: Start difference. First operand 296 states and 372 transitions. Second operand 12 states. [2020-10-29 10:03:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:19,879 INFO L93 Difference]: Finished difference Result 506 states and 627 transitions. [2020-10-29 10:03:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 10:03:19,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 10:03:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:19,884 INFO L225 Difference]: With dead ends: 506 [2020-10-29 10:03:19,884 INFO L226 Difference]: Without dead ends: 456 [2020-10-29 10:03:19,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 10:03:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-29 10:03:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 365. [2020-10-29 10:03:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-29 10:03:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 458 transitions. [2020-10-29 10:03:19,966 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 458 transitions. Word has length 48 [2020-10-29 10:03:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:19,966 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 458 transitions. [2020-10-29 10:03:19,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 10:03:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 458 transitions. [2020-10-29 10:03:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 10:03:19,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:19,968 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:19,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 10:03:19,968 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash 159995369, now seen corresponding path program 3 times [2020-10-29 10:03:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:19,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727931727] [2020-10-29 10:03:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:19,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:20,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:21,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:21,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:21,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:21,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:23,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:23,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:23,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:23,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:23,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:24,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:24,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:24,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:24,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:24,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:25,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:25,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 10:03:25,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-29 10:03:25,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-29 10:03:25,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:25,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:25,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:03:25,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 10:03:25,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 10:03:25,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:25,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:25,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:25,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:25,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:25,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:25,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:03:25,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:25,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:25,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 10:03:25,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727931727] [2020-10-29 10:03:25,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:25,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 10:03:25,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209573607] [2020-10-29 10:03:25,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 10:03:25,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 10:03:25,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:03:25,370 INFO L87 Difference]: Start difference. First operand 365 states and 458 transitions. Second operand 12 states. [2020-10-29 10:03:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:26,311 INFO L93 Difference]: Finished difference Result 565 states and 696 transitions. [2020-10-29 10:03:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 10:03:26,312 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 10:03:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:26,315 INFO L225 Difference]: With dead ends: 565 [2020-10-29 10:03:26,315 INFO L226 Difference]: Without dead ends: 363 [2020-10-29 10:03:26,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-29 10:03:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-29 10:03:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 295. [2020-10-29 10:03:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-29 10:03:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 361 transitions. [2020-10-29 10:03:26,386 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 361 transitions. Word has length 48 [2020-10-29 10:03:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:26,387 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 361 transitions. [2020-10-29 10:03:26,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 10:03:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 361 transitions. [2020-10-29 10:03:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 10:03:26,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:26,388 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:26,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 10:03:26,389 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash -637109193, now seen corresponding path program 2 times [2020-10-29 10:03:26,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:26,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018536336] [2020-10-29 10:03:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:26,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:26,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:26,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:26,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:29,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:29,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 10:03:29,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 10:03:29,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3167 [2020-10-29 10:03:29,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:29,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 10:03:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:03:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 10:03:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:29,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:29,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:29,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:29,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:29,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:29,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:03:29,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:29,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:29,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:29,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:29,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:29,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:03:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-29 10:03:29,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018536336] [2020-10-29 10:03:29,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:29,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 10:03:29,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108107515] [2020-10-29 10:03:29,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 10:03:29,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 10:03:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 10:03:29,699 INFO L87 Difference]: Start difference. First operand 295 states and 361 transitions. Second operand 7 states. [2020-10-29 10:03:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:30,110 INFO L93 Difference]: Finished difference Result 533 states and 657 transitions. [2020-10-29 10:03:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 10:03:30,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-29 10:03:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:30,113 INFO L225 Difference]: With dead ends: 533 [2020-10-29 10:03:30,113 INFO L226 Difference]: Without dead ends: 491 [2020-10-29 10:03:30,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:03:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-29 10:03:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 299. [2020-10-29 10:03:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-29 10:03:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 366 transitions. [2020-10-29 10:03:30,186 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 366 transitions. Word has length 48 [2020-10-29 10:03:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:30,186 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 366 transitions. [2020-10-29 10:03:30,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 10:03:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 366 transitions. [2020-10-29 10:03:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 10:03:30,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:30,191 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:30,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 10:03:30,191 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:30,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1308470802, now seen corresponding path program 3 times [2020-10-29 10:03:30,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:30,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194519984] [2020-10-29 10:03:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:30,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:30,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:30,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:30,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:30,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:35,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:35,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 10:03:35,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:03:35,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 10:03:35,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:35,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:03:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:03:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 10:03:35,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:35,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:35,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:35,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:35,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:35,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:35,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:03:35,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:35,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-29 10:03:35,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194519984] [2020-10-29 10:03:35,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:35,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 10:03:35,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614101738] [2020-10-29 10:03:35,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 10:03:35,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 10:03:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:03:35,621 INFO L87 Difference]: Start difference. First operand 299 states and 366 transitions. Second operand 12 states. [2020-10-29 10:03:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:36,510 INFO L93 Difference]: Finished difference Result 702 states and 890 transitions. [2020-10-29 10:03:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:03:36,510 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-29 10:03:36,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:36,514 INFO L225 Difference]: With dead ends: 702 [2020-10-29 10:03:36,515 INFO L226 Difference]: Without dead ends: 695 [2020-10-29 10:03:36,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 10:03:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-29 10:03:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 484. [2020-10-29 10:03:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-10-29 10:03:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 598 transitions. [2020-10-29 10:03:36,643 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 598 transitions. Word has length 50 [2020-10-29 10:03:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:36,644 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 598 transitions. [2020-10-29 10:03:36,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 10:03:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 598 transitions. [2020-10-29 10:03:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 10:03:36,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:36,646 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:36,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 10:03:36,646 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1098781932, now seen corresponding path program 4 times [2020-10-29 10:03:36,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:36,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387158318] [2020-10-29 10:03:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:36,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:36,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:36,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:36,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:36,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:37,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:37,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:38,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:39,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:39,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:39,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:40,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:40,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:40,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:40,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:40,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:40,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:41,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:41,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 10:03:41,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 10:03:41,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 10:03:41,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:41,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 10:03:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:03:41,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 10:03:41,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:03:41,866 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 27 [2020-10-29 10:03:41,999 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-29 10:03:42,330 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 43 [2020-10-29 10:03:42,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:42,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:42,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:42,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:42,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:42,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 10:03:42,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:42,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 10:03:42,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387158318] [2020-10-29 10:03:42,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:42,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 10:03:42,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104884282] [2020-10-29 10:03:42,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 10:03:42,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 10:03:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:03:42,425 INFO L87 Difference]: Start difference. First operand 484 states and 598 transitions. Second operand 9 states. [2020-10-29 10:03:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:43,368 INFO L93 Difference]: Finished difference Result 1214 states and 1507 transitions. [2020-10-29 10:03:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:03:43,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-29 10:03:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:43,375 INFO L225 Difference]: With dead ends: 1214 [2020-10-29 10:03:43,376 INFO L226 Difference]: Without dead ends: 1011 [2020-10-29 10:03:43,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:03:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-10-29 10:03:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 766. [2020-10-29 10:03:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-29 10:03:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 974 transitions. [2020-10-29 10:03:43,578 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 974 transitions. Word has length 54 [2020-10-29 10:03:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:43,578 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 974 transitions. [2020-10-29 10:03:43,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 10:03:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 974 transitions. [2020-10-29 10:03:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 10:03:43,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:43,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:43,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 10:03:43,581 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:43,582 INFO L82 PathProgramCache]: Analyzing trace with hash 964768426, now seen corresponding path program 5 times [2020-10-29 10:03:43,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:43,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211824179] [2020-10-29 10:03:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:43,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:43,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:43,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:43,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:43,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:44,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:44,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:44,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:44,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:44,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:45,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:46,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:46,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:46,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:46,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:46,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:47,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:48,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:48,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:48,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:48,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 10:03:48,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-29 10:03:48,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 10:03:48,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:48,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:48,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:03:48,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:03:48,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 10:03:48,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:49,070 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-10-29 10:03:49,500 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 42 [2020-10-29 10:03:49,888 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 38 [2020-10-29 10:03:50,132 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-29 10:03:50,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:50,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:50,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:50,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:50,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 10:03:50,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:50,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:50,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:50,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:50,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:50,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 10:03:50,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211824179] [2020-10-29 10:03:50,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:50,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:03:50,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352572494] [2020-10-29 10:03:50,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:03:50,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:03:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:03:50,210 INFO L87 Difference]: Start difference. First operand 766 states and 974 transitions. Second operand 11 states. [2020-10-29 10:03:50,525 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-29 10:03:50,670 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-29 10:03:50,838 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-29 10:03:51,194 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-29 10:03:51,434 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-29 10:03:51,669 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-29 10:03:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:51,877 INFO L93 Difference]: Finished difference Result 781 states and 988 transitions. [2020-10-29 10:03:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:03:51,877 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-29 10:03:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:51,885 INFO L225 Difference]: With dead ends: 781 [2020-10-29 10:03:51,886 INFO L226 Difference]: Without dead ends: 601 [2020-10-29 10:03:51,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-29 10:03:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-29 10:03:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2020-10-29 10:03:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-10-29 10:03:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 773 transitions. [2020-10-29 10:03:52,024 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 773 transitions. Word has length 54 [2020-10-29 10:03:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:52,025 INFO L481 AbstractCegarLoop]: Abstraction has 601 states and 773 transitions. [2020-10-29 10:03:52,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:03:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 773 transitions. [2020-10-29 10:03:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 10:03:52,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:52,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:52,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 10:03:52,027 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash -360426427, now seen corresponding path program 6 times [2020-10-29 10:03:52,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:52,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858585992] [2020-10-29 10:03:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:52,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:52,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:52,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:52,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:52,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:52,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:53,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:53,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:53,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:53,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:54,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:54,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:54,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:54,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:55,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:55,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:55,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:57,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:57,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 10:03:57,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-29 10:03:57,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 10:03:57,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:57,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:03:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:03:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 10:03:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:57,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:03:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:57,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:57,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:03:57,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:03:57,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:03:57,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:03:57,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:03:57,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:03:57,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:03:57,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:03:57,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:03:57,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:03:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-29 10:03:57,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858585992] [2020-10-29 10:03:57,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:03:57,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:03:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206789832] [2020-10-29 10:03:57,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:03:57,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:03:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:03:57,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:03:57,336 INFO L87 Difference]: Start difference. First operand 601 states and 773 transitions. Second operand 10 states. [2020-10-29 10:03:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:03:57,907 INFO L93 Difference]: Finished difference Result 868 states and 1124 transitions. [2020-10-29 10:03:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:03:57,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-29 10:03:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:03:57,912 INFO L225 Difference]: With dead ends: 868 [2020-10-29 10:03:57,912 INFO L226 Difference]: Without dead ends: 861 [2020-10-29 10:03:57,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:03:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-10-29 10:03:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 601. [2020-10-29 10:03:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-10-29 10:03:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 771 transitions. [2020-10-29 10:03:58,038 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 771 transitions. Word has length 56 [2020-10-29 10:03:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:03:58,039 INFO L481 AbstractCegarLoop]: Abstraction has 601 states and 771 transitions. [2020-10-29 10:03:58,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:03:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 771 transitions. [2020-10-29 10:03:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 10:03:58,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:03:58,041 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:03:58,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 10:03:58,042 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:03:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:03:58,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1463361617, now seen corresponding path program 7 times [2020-10-29 10:03:58,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:03:58,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797508236] [2020-10-29 10:03:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:03:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:03:58,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:58,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:58,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:58,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:58,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:58,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:59,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:59,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:03:59,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:00,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:00,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:01,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:01,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:01,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:01,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:01,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:01,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:02,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:02,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:03,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:03,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 10:04:03,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 10:04:03,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 10:04:03,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:03,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 10:04:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:04:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 10:04:03,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:03,615 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 47 [2020-10-29 10:04:04,031 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 47 [2020-10-29 10:04:04,529 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 66 [2020-10-29 10:04:04,979 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 62 [2020-10-29 10:04:05,522 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 66 [2020-10-29 10:04:05,825 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2020-10-29 10:04:05,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:04:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:05,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:05,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:05,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:04:05,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:04:05,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:04:05,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:05,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:04:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:04:05,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:04:05,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-29 10:04:05,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797508236] [2020-10-29 10:04:05,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:04:05,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 10:04:05,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774083416] [2020-10-29 10:04:05,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 10:04:05,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:04:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 10:04:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:04:05,953 INFO L87 Difference]: Start difference. First operand 601 states and 771 transitions. Second operand 13 states. [2020-10-29 10:04:06,260 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-29 10:04:06,426 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-29 10:04:06,581 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-29 10:04:06,782 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-29 10:04:07,132 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-29 10:04:07,426 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-29 10:04:07,824 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-29 10:04:08,056 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-10-29 10:04:08,309 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2020-10-29 10:04:08,771 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 51 [2020-10-29 10:04:09,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:09,108 INFO L93 Difference]: Finished difference Result 1001 states and 1277 transitions. [2020-10-29 10:04:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 10:04:09,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-29 10:04:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:09,113 INFO L225 Difference]: With dead ends: 1001 [2020-10-29 10:04:09,114 INFO L226 Difference]: Without dead ends: 971 [2020-10-29 10:04:09,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-29 10:04:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2020-10-29 10:04:09,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 654. [2020-10-29 10:04:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2020-10-29 10:04:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 837 transitions. [2020-10-29 10:04:09,274 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 837 transitions. Word has length 57 [2020-10-29 10:04:09,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:09,274 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 837 transitions. [2020-10-29 10:04:09,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 10:04:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 837 transitions. [2020-10-29 10:04:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 10:04:09,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:09,277 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:04:09,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 10:04:09,277 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:09,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:09,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1292654334, now seen corresponding path program 4 times [2020-10-29 10:04:09,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:09,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443876309] [2020-10-29 10:04:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:09,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:09,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:14,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 10:04:14,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:14,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:04:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:14,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:14,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:04:14,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:04:14,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:04:14,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:14,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:04:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:04:14,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:04:14,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-29 10:04:14,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443876309] [2020-10-29 10:04:14,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:04:14,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 10:04:14,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665328086] [2020-10-29 10:04:14,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 10:04:14,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:04:14,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 10:04:14,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:04:14,473 INFO L87 Difference]: Start difference. First operand 654 states and 837 transitions. Second operand 8 states. [2020-10-29 10:04:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:15,034 INFO L93 Difference]: Finished difference Result 1176 states and 1491 transitions. [2020-10-29 10:04:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:04:15,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-29 10:04:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:15,039 INFO L225 Difference]: With dead ends: 1176 [2020-10-29 10:04:15,039 INFO L226 Difference]: Without dead ends: 1116 [2020-10-29 10:04:15,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:04:15,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2020-10-29 10:04:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 662. [2020-10-29 10:04:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-10-29 10:04:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 847 transitions. [2020-10-29 10:04:15,240 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 847 transitions. Word has length 60 [2020-10-29 10:04:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:15,240 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 847 transitions. [2020-10-29 10:04:15,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 10:04:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 847 transitions. [2020-10-29 10:04:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 10:04:15,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:15,243 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:04:15,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 10:04:15,243 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:15,247 INFO L82 PathProgramCache]: Analyzing trace with hash 180349533, now seen corresponding path program 5 times [2020-10-29 10:04:15,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:15,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943072318] [2020-10-29 10:04:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:15,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:15,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:20,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:20,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 10:04:20,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:04:20,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 10:04:20,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:20,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:20,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 10:04:20,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 10:04:20,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 10:04:20,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:20,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:04:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:20,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:20,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:20,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:04:20,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:04:20,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:04:20,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:20,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:20,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:04:20,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:04:20,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:04:20,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 10:04:20,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943072318] [2020-10-29 10:04:20,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:04:20,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 10:04:20,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509694507] [2020-10-29 10:04:20,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 10:04:20,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:04:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 10:04:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:04:20,712 INFO L87 Difference]: Start difference. First operand 662 states and 847 transitions. Second operand 14 states. [2020-10-29 10:04:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:22,054 INFO L93 Difference]: Finished difference Result 1592 states and 2062 transitions. [2020-10-29 10:04:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 10:04:22,055 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-29 10:04:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:22,062 INFO L225 Difference]: With dead ends: 1592 [2020-10-29 10:04:22,062 INFO L226 Difference]: Without dead ends: 1585 [2020-10-29 10:04:22,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-29 10:04:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-10-29 10:04:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 975. [2020-10-29 10:04:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2020-10-29 10:04:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1247 transitions. [2020-10-29 10:04:22,369 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1247 transitions. Word has length 62 [2020-10-29 10:04:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:22,370 INFO L481 AbstractCegarLoop]: Abstraction has 975 states and 1247 transitions. [2020-10-29 10:04:22,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 10:04:22,370 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1247 transitions. [2020-10-29 10:04:22,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 10:04:22,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:22,373 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:04:22,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 10:04:22,374 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:22,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:22,374 INFO L82 PathProgramCache]: Analyzing trace with hash -713921675, now seen corresponding path program 8 times [2020-10-29 10:04:22,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:22,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80994293] [2020-10-29 10:04:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:22,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:22,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:23,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:23,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 10:04:23,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:04:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-29 10:04:23,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:23,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:04:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 10:04:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 10:04:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:23,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:04:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:23,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:23,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:23,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:04:23,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:04:23,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 10:04:23,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:23,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:04:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:04:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:04:23,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-29 10:04:23,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80994293] [2020-10-29 10:04:23,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:04:23,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:04:23,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653874712] [2020-10-29 10:04:23,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:04:23,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:04:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:04:23,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:04:23,350 INFO L87 Difference]: Start difference. First operand 975 states and 1247 transitions. Second operand 11 states. [2020-10-29 10:04:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:24,324 INFO L93 Difference]: Finished difference Result 1547 states and 1972 transitions. [2020-10-29 10:04:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 10:04:24,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-29 10:04:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:24,330 INFO L225 Difference]: With dead ends: 1547 [2020-10-29 10:04:24,330 INFO L226 Difference]: Without dead ends: 1540 [2020-10-29 10:04:24,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-29 10:04:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2020-10-29 10:04:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1304. [2020-10-29 10:04:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2020-10-29 10:04:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1671 transitions. [2020-10-29 10:04:24,654 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1671 transitions. Word has length 66 [2020-10-29 10:04:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:24,655 INFO L481 AbstractCegarLoop]: Abstraction has 1304 states and 1671 transitions. [2020-10-29 10:04:24,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:04:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1671 transitions. [2020-10-29 10:04:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 10:04:24,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:24,659 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:04:24,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 10:04:24,659 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:24,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1993785353, now seen corresponding path program 9 times [2020-10-29 10:04:24,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:24,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536157543] [2020-10-29 10:04:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:24,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:24,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:24,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:24,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:25,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:25,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:25,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:25,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:25,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:26,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:26,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:27,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:27,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:27,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:28,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:28,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:28,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:28,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:29,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:29,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:29,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 10:04:29,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 10:04:29,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 10:04:29,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:29,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:04:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 10:04:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 10:04:29,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:30,104 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2020-10-29 10:04:30,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:04:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:30,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:30,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:30,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:04:30,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:04:30,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:04:30,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:30,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:04:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:04:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:04:30,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-29 10:04:30,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536157543] [2020-10-29 10:04:30,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:04:30,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 10:04:30,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451796647] [2020-10-29 10:04:30,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 10:04:30,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:04:30,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 10:04:30,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:04:30,201 INFO L87 Difference]: Start difference. First operand 1304 states and 1671 transitions. Second operand 12 states. [2020-10-29 10:04:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:31,316 INFO L93 Difference]: Finished difference Result 2759 states and 3459 transitions. [2020-10-29 10:04:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:04:31,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-29 10:04:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:31,324 INFO L225 Difference]: With dead ends: 2759 [2020-10-29 10:04:31,324 INFO L226 Difference]: Without dead ends: 1817 [2020-10-29 10:04:31,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-29 10:04:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2020-10-29 10:04:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1265. [2020-10-29 10:04:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1265 states. [2020-10-29 10:04:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1566 transitions. [2020-10-29 10:04:31,657 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1566 transitions. Word has length 66 [2020-10-29 10:04:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:31,658 INFO L481 AbstractCegarLoop]: Abstraction has 1265 states and 1566 transitions. [2020-10-29 10:04:31,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 10:04:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1566 transitions. [2020-10-29 10:04:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 10:04:31,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:31,661 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:04:31,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 10:04:31,661 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:31,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1130285863, now seen corresponding path program 10 times [2020-10-29 10:04:31,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:31,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533185392] [2020-10-29 10:04:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:31,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:31,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:31,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:32,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:32,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:32,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:33,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:34,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:34,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:35,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:35,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:36,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:36,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 10:04:36,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 10:04:36,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 10:04:36,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:36,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:36,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 10:04:36,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 10:04:36,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 10:04:36,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:37,553 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-29 10:04:37,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:04:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:37,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:37,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:37,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:04:37,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:04:37,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:04:37,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:37,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:37,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:04:37,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:04:37,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:04:37,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-29 10:04:37,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533185392] [2020-10-29 10:04:37,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:04:37,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 10:04:37,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575834571] [2020-10-29 10:04:37,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 10:04:37,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:04:37,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 10:04:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:04:37,651 INFO L87 Difference]: Start difference. First operand 1265 states and 1566 transitions. Second operand 14 states. [2020-10-29 10:04:38,403 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2020-10-29 10:04:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:39,877 INFO L93 Difference]: Finished difference Result 2876 states and 3618 transitions. [2020-10-29 10:04:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 10:04:39,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-29 10:04:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:39,885 INFO L225 Difference]: With dead ends: 2876 [2020-10-29 10:04:39,885 INFO L226 Difference]: Without dead ends: 2401 [2020-10-29 10:04:39,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-29 10:04:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2020-10-29 10:04:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 1905. [2020-10-29 10:04:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1905 states. [2020-10-29 10:04:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2421 transitions. [2020-10-29 10:04:40,316 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2421 transitions. Word has length 68 [2020-10-29 10:04:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:40,316 INFO L481 AbstractCegarLoop]: Abstraction has 1905 states and 2421 transitions. [2020-10-29 10:04:40,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 10:04:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2421 transitions. [2020-10-29 10:04:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 10:04:40,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:40,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:04:40,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 10:04:40,321 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1580229657, now seen corresponding path program 11 times [2020-10-29 10:04:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:40,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025137286] [2020-10-29 10:04:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:40,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:40,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:40,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:40,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:41,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:41,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:42,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:43,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:43,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:43,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:43,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:45,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 10:04:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:45,705 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2020-10-29 10:04:45,846 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 28 [2020-10-29 10:04:46,300 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 33 [2020-10-29 10:04:46,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:04:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:46,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:46,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:46,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:04:46,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:04:46,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:04:46,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:46,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:46,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:04:46,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:04:46,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:04:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-29 10:04:46,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025137286] [2020-10-29 10:04:46,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:04:46,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 10:04:46,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968438171] [2020-10-29 10:04:46,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 10:04:46,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:04:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 10:04:46,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-29 10:04:46,410 INFO L87 Difference]: Start difference. First operand 1905 states and 2421 transitions. Second operand 15 states. [2020-10-29 10:04:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:48,555 INFO L93 Difference]: Finished difference Result 2675 states and 3336 transitions. [2020-10-29 10:04:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 10:04:48,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-29 10:04:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:48,564 INFO L225 Difference]: With dead ends: 2675 [2020-10-29 10:04:48,564 INFO L226 Difference]: Without dead ends: 2542 [2020-10-29 10:04:48,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-10-29 10:04:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2020-10-29 10:04:48,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2065. [2020-10-29 10:04:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-10-29 10:04:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2605 transitions. [2020-10-29 10:04:49,001 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2605 transitions. Word has length 68 [2020-10-29 10:04:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:49,001 INFO L481 AbstractCegarLoop]: Abstraction has 2065 states and 2605 transitions. [2020-10-29 10:04:49,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 10:04:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2605 transitions. [2020-10-29 10:04:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 10:04:49,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:49,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:04:49,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 10:04:49,006 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:49,007 INFO L82 PathProgramCache]: Analyzing trace with hash 42200541, now seen corresponding path program 12 times [2020-10-29 10:04:49,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:49,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846850533] [2020-10-29 10:04:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:49,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:49,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:50,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:50,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:50,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:50,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:54,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:54,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 10:04:54,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 10:04:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 10:04:54,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:54,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 10:04:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 10:04:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 10:04:54,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:54,688 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-29 10:04:54,845 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-29 10:04:54,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:04:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:54,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:54,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:04:54,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:04:54,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:04:54,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:04:54,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:04:54,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:04:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:04:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:04:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:04:54,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:04:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-29 10:04:54,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846850533] [2020-10-29 10:04:54,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:04:54,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 10:04:54,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794992072] [2020-10-29 10:04:54,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 10:04:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:04:54,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 10:04:54,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-29 10:04:54,942 INFO L87 Difference]: Start difference. First operand 2065 states and 2605 transitions. Second operand 15 states. [2020-10-29 10:04:57,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:04:57,255 INFO L93 Difference]: Finished difference Result 4203 states and 5256 transitions. [2020-10-29 10:04:57,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 10:04:57,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-29 10:04:57,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:04:57,267 INFO L225 Difference]: With dead ends: 4203 [2020-10-29 10:04:57,267 INFO L226 Difference]: Without dead ends: 3640 [2020-10-29 10:04:57,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-10-29 10:04:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3640 states. [2020-10-29 10:04:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3640 to 2716. [2020-10-29 10:04:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2716 states. [2020-10-29 10:04:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3428 transitions. [2020-10-29 10:04:57,933 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3428 transitions. Word has length 68 [2020-10-29 10:04:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:04:57,933 INFO L481 AbstractCegarLoop]: Abstraction has 2716 states and 3428 transitions. [2020-10-29 10:04:57,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 10:04:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3428 transitions. [2020-10-29 10:04:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 10:04:57,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:04:57,938 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:04:57,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 10:04:57,938 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:04:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:04:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash -776882433, now seen corresponding path program 13 times [2020-10-29 10:04:57,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:04:57,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045217223] [2020-10-29 10:04:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:04:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:04:57,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:57,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:58,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:04:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:00,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:00,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:00,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:00,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:02,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:02,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:02,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:03,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:05:03,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 10:05:03,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 10:05:03,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-29 10:05:03,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:05:03,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:05:03,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:05:03,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 10:05:03,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 10:05:03,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:05:03,472 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-29 10:05:03,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:05:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:05:03,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:03,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:05:03,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:05:03,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:05:03,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:05:03,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:05:03,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:05:03,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:05:03,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:05:03,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:05:03,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:05:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 10:05:03,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045217223] [2020-10-29 10:05:03,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:05:03,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 10:05:03,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133308881] [2020-10-29 10:05:03,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 10:05:03,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:05:03,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 10:05:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:05:03,578 INFO L87 Difference]: Start difference. First operand 2716 states and 3428 transitions. Second operand 12 states. [2020-10-29 10:05:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:05:05,046 INFO L93 Difference]: Finished difference Result 3385 states and 4276 transitions. [2020-10-29 10:05:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:05:05,047 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-29 10:05:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:05:05,058 INFO L225 Difference]: With dead ends: 3385 [2020-10-29 10:05:05,058 INFO L226 Difference]: Without dead ends: 3172 [2020-10-29 10:05:05,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-29 10:05:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2020-10-29 10:05:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 2433. [2020-10-29 10:05:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2020-10-29 10:05:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3075 transitions. [2020-10-29 10:05:05,628 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3075 transitions. Word has length 69 [2020-10-29 10:05:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:05:05,628 INFO L481 AbstractCegarLoop]: Abstraction has 2433 states and 3075 transitions. [2020-10-29 10:05:05,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 10:05:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3075 transitions. [2020-10-29 10:05:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 10:05:05,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:05:05,632 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:05:05,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 10:05:05,632 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:05:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:05:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash 369529412, now seen corresponding path program 14 times [2020-10-29 10:05:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:05:05,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293793203] [2020-10-29 10:05:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:05:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:05:05,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:05,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:05,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:05,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:05,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:06,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:07,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:07,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:08,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:08,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:09,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:10,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:05:10,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 10:05:10,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 10:05:10,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 10:05:10,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:05:10,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:05:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:05:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:05:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 10:05:10,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:05:10,897 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2020-10-29 10:05:11,057 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 42 [2020-10-29 10:05:11,362 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 45 [2020-10-29 10:05:11,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:05:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:05:11,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:11,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:05:11,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:05:11,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:05:11,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:05:11,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:05:11,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:05:11,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:05:11,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:05:11,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:05:11,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:05:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-29 10:05:11,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293793203] [2020-10-29 10:05:11,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:05:11,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 10:05:11,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728173296] [2020-10-29 10:05:11,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 10:05:11,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:05:11,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 10:05:11,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:05:11,444 INFO L87 Difference]: Start difference. First operand 2433 states and 3075 transitions. Second operand 9 states. [2020-10-29 10:05:11,666 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-29 10:05:12,058 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-29 10:05:12,206 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-29 10:05:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:05:12,948 INFO L93 Difference]: Finished difference Result 3921 states and 4936 transitions. [2020-10-29 10:05:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 10:05:12,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-29 10:05:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:05:12,961 INFO L225 Difference]: With dead ends: 3921 [2020-10-29 10:05:12,961 INFO L226 Difference]: Without dead ends: 2565 [2020-10-29 10:05:12,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:05:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2020-10-29 10:05:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2452. [2020-10-29 10:05:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2020-10-29 10:05:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3019 transitions. [2020-10-29 10:05:13,545 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3019 transitions. Word has length 71 [2020-10-29 10:05:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:05:13,545 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 3019 transitions. [2020-10-29 10:05:13,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 10:05:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3019 transitions. [2020-10-29 10:05:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 10:05:13,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:05:13,551 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:05:13,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 10:05:13,551 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:05:13,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:05:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2012825732, now seen corresponding path program 15 times [2020-10-29 10:05:13,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:05:13,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703927347] [2020-10-29 10:05:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:05:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:05:13,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:13,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:13,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:13,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:14,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:14,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:14,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:14,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:15,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:15,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:16,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:18,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:05:18,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 10:05:18,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 10:05:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 10:05:18,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:05:18,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:05:18,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 10:05:18,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 10:05:18,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 10:05:18,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:05:18,779 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2020-10-29 10:05:18,903 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2020-10-29 10:05:19,030 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-10-29 10:05:19,362 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 39 [2020-10-29 10:05:19,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:05:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:05:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:05:19,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:05:19,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:05:19,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:05:19,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 10:05:19,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:05:19,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:05:19,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:05:19,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:05:19,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:05:19,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:05:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 24 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-29 10:05:19,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703927347] [2020-10-29 10:05:19,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:05:19,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 10:05:19,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869919049] [2020-10-29 10:05:19,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 10:05:19,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:05:19,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 10:05:19,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:05:19,449 INFO L87 Difference]: Start difference. First operand 2452 states and 3019 transitions. Second operand 13 states.