/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/array-crafted/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:47:09,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:47:09,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:47:09,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:47:09,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:47:09,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:47:09,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:47:09,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:47:09,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:47:09,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:47:09,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:47:09,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:47:09,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:47:09,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:47:09,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:47:09,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:47:09,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:47:09,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:47:09,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:47:09,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:47:09,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:47:09,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:47:09,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:47:09,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:47:09,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:47:09,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:47:09,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:47:09,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:47:09,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:47:09,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:47:09,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:47:09,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:47:09,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:47:09,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:47:09,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:47:09,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:47:09,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:47:09,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:47:09,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:47:09,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:47:09,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:47:09,899 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 [2020-10-28 08:47:09,930 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:47:09,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:47:09,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:47:09,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:47:09,933 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:47:09,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:47:09,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:47:09,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:47:09,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:47:09,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:47:09,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:47:09,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:47:09,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:47:09,935 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:47:09,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:47:09,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:47:09,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:47:09,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:47:09,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:47:09,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:47:09,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:47:09,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:47:09,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:47:09,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:47:09,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:47:09,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:47:09,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:47:09,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:47:09,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:47:09,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:47:10,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:47:10,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:47:10,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:47:10,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:47:10,390 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:47:10,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2020-10-28 08:47:10,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbc159a09/7617f816a63647d28f17ed1189334f87/FLAG3e38579f1 [2020-10-28 08:47:11,108 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:47:11,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2020-10-28 08:47:11,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbc159a09/7617f816a63647d28f17ed1189334f87/FLAG3e38579f1 [2020-10-28 08:47:11,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbc159a09/7617f816a63647d28f17ed1189334f87 [2020-10-28 08:47:11,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:47:11,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:47:11,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:11,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:47:11,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:47:11,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@696d964b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11, skipping insertion in model container [2020-10-28 08:47:11,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:47:11,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:47:11,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:11,729 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:47:11,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:11,778 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:47:11,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11 WrapperNode [2020-10-28 08:47:11,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:11,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:47:11,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:47:11,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:47:11,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (1/1) ... [2020-10-28 08:47:11,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:47:11,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:47:11,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:47:11,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:47:11,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (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 [2020-10-28 08:47:11,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:47:11,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:47:11,932 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:47:11,933 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:47:11,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:47:11,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:47:11,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:47:11,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:47:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:47:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:47:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:47:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:47:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-28 08:47:11,935 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 08:47:11,935 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:47:11,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 08:47:11,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:47:11,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:47:11,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:47:11,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:47:11,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:47:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:47:12,567 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:47:12,567 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:47:12,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:12 BoogieIcfgContainer [2020-10-28 08:47:12,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:47:12,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:47:12,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:47:12,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:47:12,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:47:11" (1/3) ... [2020-10-28 08:47:12,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5948a549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:12, skipping insertion in model container [2020-10-28 08:47:12,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:11" (2/3) ... [2020-10-28 08:47:12,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5948a549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:12, skipping insertion in model container [2020-10-28 08:47:12,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:12" (3/3) ... [2020-10-28 08:47:12,619 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2020-10-28 08:47:12,649 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:47:12,663 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:47:12,715 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:47:12,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:47:12,757 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:47:12,758 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:47:12,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:47:12,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:47:12,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:47:12,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:47:12,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:47:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 08:47:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:47:12,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:12,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:12,795 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1679398581, now seen corresponding path program 1 times [2020-10-28 08:47:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:12,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32816791] [2020-10-28 08:47:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:13,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:13,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:13,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:13,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:13,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:13,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:14,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:14,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:47:14,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:47:14,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-28 08:47:14,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:14,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:14,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:14,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:47:14,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:14,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:47:14,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:14,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:14,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:14,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:14,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:14,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:47:14,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:14,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:14,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:14,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:14,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:14,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:47:14,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32816791] [2020-10-28 08:47:14,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:14,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:47:14,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169527360] [2020-10-28 08:47:14,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:47:14,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:47:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:14,475 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-28 08:47:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:14,653 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-10-28 08:47:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:47:14,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 08:47:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:14,665 INFO L225 Difference]: With dead ends: 62 [2020-10-28 08:47:14,665 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 08:47:14,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 08:47:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 08:47:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 08:47:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-28 08:47:14,719 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-10-28 08:47:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:14,720 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-28 08:47:14,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:47:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-28 08:47:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:47:14,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:14,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:14,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:47:14,722 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash -359303743, now seen corresponding path program 1 times [2020-10-28 08:47:14,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:14,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201912781] [2020-10-28 08:47:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:14,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:14,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:14,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:14,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:15,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:15,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:15,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:47:15,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:47:15,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-28 08:47:15,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:15,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:47:15,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:15,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:47:15,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:15,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:15,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:15,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:15,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:15,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:15,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:47:15,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:15,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:15,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:15,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:47:15,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201912781] [2020-10-28 08:47:15,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:15,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:47:15,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942045170] [2020-10-28 08:47:15,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:47:15,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:47:15,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:15,860 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-10-28 08:47:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:16,130 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-28 08:47:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:47:16,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 08:47:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:16,132 INFO L225 Difference]: With dead ends: 55 [2020-10-28 08:47:16,132 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 08:47:16,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:47:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 08:47:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-28 08:47:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 08:47:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 08:47:16,145 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2020-10-28 08:47:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:16,145 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 08:47:16,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:47:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 08:47:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:47:16,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:16,147 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, 1] [2020-10-28 08:47:16,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:47:16,147 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1073664907, now seen corresponding path program 1 times [2020-10-28 08:47:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690175608] [2020-10-28 08:47:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:16,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:16,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:16,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:16,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:16,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:17,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:18,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:18,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:18,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:19,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:21,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:47:21,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:47:21,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:47:21,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:21,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:47:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:47:21,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:21,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:21,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:21,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:21,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:47:21,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:21,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:21,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:21,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:21,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:21,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:47:21,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690175608] [2020-10-28 08:47:21,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:21,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:47:21,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520767637] [2020-10-28 08:47:21,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:47:21,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:47:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:47:21,282 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-28 08:47:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:21,526 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-28 08:47:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:47:21,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-28 08:47:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:21,528 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:47:21,528 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:47:21,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:47:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:47:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:47:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:47:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-28 08:47:21,540 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2020-10-28 08:47:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:21,541 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-28 08:47:21,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:47:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-28 08:47:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:47:21,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:21,545 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:47:21,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:47:21,546 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:21,547 INFO L82 PathProgramCache]: Analyzing trace with hash 169491669, now seen corresponding path program 2 times [2020-10-28 08:47:21,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:21,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961434920] [2020-10-28 08:47:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:21,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:22,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:24,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:26,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:26,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:47:26,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:47:26,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5230 [2020-10-28 08:47:26,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:26,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:26,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:47:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:26,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:47:26,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:28,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:28,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:28,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:28,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:28,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:28,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:47:28,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:28,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:28,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:28,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:28,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:28,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:47:28,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961434920] [2020-10-28 08:47:28,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:28,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:47:28,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855962546] [2020-10-28 08:47:28,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:47:28,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:28,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:47:28,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:47:28,103 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 23 states. [2020-10-28 08:47:28,335 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-28 08:47:28,936 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-28 08:47:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:30,758 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-10-28 08:47:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:47:30,758 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-28 08:47:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:30,760 INFO L225 Difference]: With dead ends: 77 [2020-10-28 08:47:30,760 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:47:30,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 08:47:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:47:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-28 08:47:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 08:47:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-28 08:47:30,776 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 41 [2020-10-28 08:47:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:30,776 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-28 08:47:30,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:47:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-28 08:47:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:47:30,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:30,778 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:47:30,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:47:30,779 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash -92060713, now seen corresponding path program 3 times [2020-10-28 08:47:30,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:30,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773747410] [2020-10-28 08:47:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:30,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:30,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:35,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:35,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:47:35,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:47:35,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:47:35,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:35,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:47:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:47:35,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:35,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:35,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:35,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:35,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:35,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:35,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:47:35,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:35,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:35,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:35,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:35,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:35,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:47:35,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773747410] [2020-10-28 08:47:35,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:35,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:47:35,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689626058] [2020-10-28 08:47:35,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:47:35,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:35,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:47:35,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:47:35,999 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 10 states. [2020-10-28 08:47:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:36,463 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-28 08:47:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:47:36,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-28 08:47:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:36,465 INFO L225 Difference]: With dead ends: 125 [2020-10-28 08:47:36,466 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 08:47:36,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:47:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 08:47:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2020-10-28 08:47:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:47:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-28 08:47:36,489 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 43 [2020-10-28 08:47:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:36,491 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-28 08:47:36,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:47:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-28 08:47:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:47:36,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:36,495 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:47:36,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:47:36,496 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash 638925081, now seen corresponding path program 4 times [2020-10-28 08:47:36,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:36,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367926327] [2020-10-28 08:47:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:36,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:38,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:39,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:41,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:47:41,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:47:41,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:47:41,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:41,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:47:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:47:41,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:41,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:41,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:41,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:41,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:41,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:47:41,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:41,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:41,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:41,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 08:47:41,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367926327] [2020-10-28 08:47:41,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:41,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:47:41,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027463156] [2020-10-28 08:47:41,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:47:41,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:41,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:47:41,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:47:41,679 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 10 states. [2020-10-28 08:47:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:42,098 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-28 08:47:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:47:42,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 08:47:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:42,101 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:47:42,101 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 08:47:42,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:47:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 08:47:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 08:47:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:47:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-28 08:47:42,118 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2020-10-28 08:47:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:42,119 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-28 08:47:42,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:47:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-28 08:47:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 08:47:42,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:42,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:42,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:47:42,122 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash -22589025, now seen corresponding path program 5 times [2020-10-28 08:47:42,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:42,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921973246] [2020-10-28 08:47:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:42,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:43,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:43,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:45,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:46,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:47,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:47,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 08:47:47,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:47:47,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:47:47,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:47,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:47,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:47:47,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:47,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 08:47:47,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:49,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:49,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:49,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:49,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:49,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:47:49,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:49,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:49,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:47:49,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921973246] [2020-10-28 08:47:49,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:49,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:47:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760930434] [2020-10-28 08:47:49,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:47:49,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:47:49,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:47:49,166 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 31 states. [2020-10-28 08:47:49,442 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 08:47:50,513 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-28 08:47:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:53,178 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2020-10-28 08:47:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 08:47:53,178 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2020-10-28 08:47:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:53,181 INFO L225 Difference]: With dead ends: 88 [2020-10-28 08:47:53,181 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:47:53,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 08:47:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:47:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-28 08:47:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 08:47:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-10-28 08:47:53,197 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 51 [2020-10-28 08:47:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:53,197 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-10-28 08:47:53,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:47:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-10-28 08:47:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:47:53,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:53,199 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:53,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:47:53,199 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:53,199 INFO L82 PathProgramCache]: Analyzing trace with hash 791895585, now seen corresponding path program 6 times [2020-10-28 08:47:53,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:53,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554030734] [2020-10-28 08:47:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:53,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:53,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:53,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:54,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:58,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:47:58,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:47:58,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:47:58,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:58,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:58,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:47:58,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:58,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:47:58,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:58,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:58,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:58,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:58,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:58,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:58,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:47:58,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:58,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:58,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:58,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:58,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:58,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 08:47:58,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554030734] [2020-10-28 08:47:58,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:58,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:47:58,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843127299] [2020-10-28 08:47:58,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:47:58,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:58,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:47:58,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:47:58,399 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 12 states. [2020-10-28 08:47:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:58,931 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-10-28 08:47:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:47:58,931 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-28 08:47:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:58,933 INFO L225 Difference]: With dead ends: 153 [2020-10-28 08:47:58,933 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 08:47:58,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:47:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 08:47:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-10-28 08:47:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 08:47:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-28 08:47:58,968 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 53 [2020-10-28 08:47:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:58,969 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-28 08:47:58,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:47:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-28 08:47:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:47:58,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:58,970 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:47:58,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:47:58,971 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:58,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1991760099, now seen corresponding path program 7 times [2020-10-28 08:47:58,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:58,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545284012] [2020-10-28 08:47:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:59,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:59,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:59,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:00,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:00,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:04,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:04,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:48:04,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:48:04,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:48:04,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:04,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:48:04,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:04,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:04,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:04,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:04,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:04,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:04,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:04,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:04,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:04,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:04,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 08:48:04,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545284012] [2020-10-28 08:48:04,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:04,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:04,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501488535] [2020-10-28 08:48:04,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:04,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:04,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:04,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:04,197 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-28 08:48:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:04,717 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-28 08:48:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:48:04,717 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-28 08:48:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:04,718 INFO L225 Difference]: With dead ends: 84 [2020-10-28 08:48:04,719 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 08:48:04,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:48:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 08:48:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 08:48:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:48:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-28 08:48:04,747 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2020-10-28 08:48:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:04,748 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-28 08:48:04,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-28 08:48:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:48:04,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:04,751 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:04,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:48:04,751 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:04,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1839353367, now seen corresponding path program 8 times [2020-10-28 08:48:04,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:04,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787385138] [2020-10-28 08:48:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:04,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:07,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:07,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:09,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:09,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 08:48:09,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:48:09,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:48:09,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:09,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:09,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 08:48:09,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:09,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 08:48:09,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:13,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:13,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:13,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:13,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:13,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:13,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:13,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:13,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:13,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:13,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:13,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:48:13,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787385138] [2020-10-28 08:48:13,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:13,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 08:48:13,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288693376] [2020-10-28 08:48:13,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 08:48:13,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:13,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 08:48:13,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 08:48:13,383 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 46 states. [2020-10-28 08:48:14,023 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-28 08:48:14,890 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-28 08:48:16,177 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-28 08:48:17,361 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-28 08:48:18,601 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-10-28 08:48:19,402 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-28 08:48:19,627 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-28 08:48:20,246 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-28 08:48:20,549 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-28 08:48:20,858 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-28 08:48:21,277 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-28 08:48:21,581 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-28 08:48:21,995 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-10-28 08:48:22,368 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 08:48:22,686 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 51 [2020-10-28 08:48:23,257 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-28 08:48:23,882 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-10-28 08:48:24,481 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-10-28 08:48:25,170 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-28 08:48:25,584 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-28 08:48:26,129 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-10-28 08:48:26,631 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-10-28 08:48:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:27,061 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2020-10-28 08:48:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-28 08:48:27,062 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 61 [2020-10-28 08:48:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:27,066 INFO L225 Difference]: With dead ends: 141 [2020-10-28 08:48:27,066 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 08:48:27,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=913, Invalid=8593, Unknown=0, NotChecked=0, Total=9506 [2020-10-28 08:48:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 08:48:27,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2020-10-28 08:48:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:48:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-10-28 08:48:27,110 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 61 [2020-10-28 08:48:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:27,110 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-10-28 08:48:27,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 08:48:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-10-28 08:48:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:48:27,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:27,112 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:27,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:48:27,116 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1826874347, now seen corresponding path program 9 times [2020-10-28 08:48:27,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:27,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505642932] [2020-10-28 08:48:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:27,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:27,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:27,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:28,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:32,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:32,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:48:32,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:48:32,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:48:32,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:32,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:32,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:48:32,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:32,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:48:32,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:32,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:32,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:32,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:32,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 08:48:32,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505642932] [2020-10-28 08:48:32,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:32,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:48:32,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480375068] [2020-10-28 08:48:32,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:48:32,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:32,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:48:32,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:48:32,349 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 14 states. [2020-10-28 08:48:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:33,019 INFO L93 Difference]: Finished difference Result 183 states and 199 transitions. [2020-10-28 08:48:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:48:33,019 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-28 08:48:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:33,021 INFO L225 Difference]: With dead ends: 183 [2020-10-28 08:48:33,021 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 08:48:33,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:48:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 08:48:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2020-10-28 08:48:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 08:48:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-28 08:48:33,040 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 63 [2020-10-28 08:48:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:33,040 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-28 08:48:33,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:48:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-28 08:48:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:48:33,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:33,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:33,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:48:33,044 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1230019371, now seen corresponding path program 10 times [2020-10-28 08:48:33,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:33,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247437364] [2020-10-28 08:48:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:33,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:33,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:34,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:38,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:38,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:48:38,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:48:38,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:48:38,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:38,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:48:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 08:48:38,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:38,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:38,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:38,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:38,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:38,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:38,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:38,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:38,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:38,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:38,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:38,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:38,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:48:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 08:48:38,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247437364] [2020-10-28 08:48:38,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:38,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:48:38,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547167156] [2020-10-28 08:48:38,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:48:38,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:38,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:48:38,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:48:38,326 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 14 states. [2020-10-28 08:48:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:39,199 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-10-28 08:48:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:48:39,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-28 08:48:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:39,201 INFO L225 Difference]: With dead ends: 108 [2020-10-28 08:48:39,201 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 08:48:39,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:48:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 08:48:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 08:48:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 08:48:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-28 08:48:39,219 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2020-10-28 08:48:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:39,221 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-28 08:48:39,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:48:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-28 08:48:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:48:39,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:39,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:39,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:48:39,223 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash 585956787, now seen corresponding path program 11 times [2020-10-28 08:48:39,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:39,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602555285] [2020-10-28 08:48:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:39,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:39,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:40,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:41,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:42,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:43,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:44,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:44,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 08:48:44,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:48:44,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 08:48:44,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:44,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 08:48:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 08:48:44,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:48,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:48,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:48,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:48,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:48,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:48:48,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:48,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:48,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:48,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:48,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:48,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:48:48,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602555285] [2020-10-28 08:48:48,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:48,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 08:48:48,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868961633] [2020-10-28 08:48:48,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 08:48:48,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:48,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 08:48:48,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1974, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 08:48:48,395 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 46 states. [2020-10-28 08:48:48,757 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-28 08:48:49,381 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-28 08:48:51,170 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 112 [2020-10-28 08:48:51,975 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-28 08:48:53,551 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-28 08:48:55,420 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-28 08:48:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:57,334 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-10-28 08:48:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 08:48:57,335 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 71 [2020-10-28 08:48:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:57,336 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:48:57,336 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 08:48:57,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=303, Invalid=5247, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 08:48:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 08:48:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2020-10-28 08:48:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 08:48:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-10-28 08:48:57,357 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 71 [2020-10-28 08:48:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:57,358 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-10-28 08:48:57,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 08:48:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-10-28 08:48:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:48:57,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:57,366 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:57,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:48:57,366 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:57,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1797491403, now seen corresponding path program 12 times [2020-10-28 08:48:57,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:57,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120474055] [2020-10-28 08:48:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:57,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:57,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:57,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:59,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:02,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:02,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:49:02,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:49:02,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:49:02,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:02,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:02,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:49:02,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:02,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:49:02,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:02,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:02,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:02,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:02,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:02,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:02,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:49:02,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:02,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:02,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:02,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:02,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:02,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:49:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-28 08:49:02,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120474055] [2020-10-28 08:49:02,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:02,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:49:02,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824925514] [2020-10-28 08:49:02,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:49:02,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:02,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:49:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:49:02,703 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 16 states. [2020-10-28 08:49:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:03,638 INFO L93 Difference]: Finished difference Result 209 states and 225 transitions. [2020-10-28 08:49:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:49:03,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-28 08:49:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:03,640 INFO L225 Difference]: With dead ends: 209 [2020-10-28 08:49:03,641 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 08:49:03,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:49:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 08:49:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2020-10-28 08:49:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 08:49:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-10-28 08:49:03,662 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 73 [2020-10-28 08:49:03,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:03,662 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-10-28 08:49:03,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:49:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-10-28 08:49:03,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:49:03,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:03,663 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:03,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:49:03,663 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:03,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1083398903, now seen corresponding path program 13 times [2020-10-28 08:49:03,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:03,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284434798] [2020-10-28 08:49:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:03,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:03,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:03,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:05,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:05,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:06,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:08,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:08,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:49:08,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:49:08,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:49:08,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:08,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:08,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:49:08,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:08,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 08:49:08,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:08,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:09,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:09,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:09,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:09,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:09,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:49:09,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:09,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:09,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 08:49:09,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284434798] [2020-10-28 08:49:09,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:09,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:49:09,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690951785] [2020-10-28 08:49:09,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:49:09,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:09,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:49:09,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:49:09,027 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 16 states. [2020-10-28 08:49:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:10,112 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-28 08:49:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:49:10,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-28 08:49:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:10,115 INFO L225 Difference]: With dead ends: 112 [2020-10-28 08:49:10,115 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:49:10,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:49:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:49:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-28 08:49:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 08:49:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-28 08:49:10,133 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2020-10-28 08:49:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:10,133 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-28 08:49:10,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:49:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-28 08:49:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:49:10,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:10,135 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:10,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:49:10,135 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1594043139, now seen corresponding path program 14 times [2020-10-28 08:49:10,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:10,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827873583] [2020-10-28 08:49:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:10,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:10,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:12,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:13,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:15,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:15,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:15,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:49:15,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:49:15,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5572 [2020-10-28 08:49:15,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:15,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-28 08:49:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 08:49:15,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:17,490 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-28 08:49:17,713 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-28 08:49:17,929 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-28 08:49:21,830 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-28 08:49:22,085 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-28 08:49:24,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:24,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:24,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:24,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:24,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:49:24,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:24,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:24,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:24,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:24,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:49:24,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827873583] [2020-10-28 08:49:24,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:24,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-28 08:49:24,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250516896] [2020-10-28 08:49:24,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-28 08:49:24,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:24,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-28 08:49:24,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=3316, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 08:49:24,642 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 62 states. [2020-10-28 08:49:25,250 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 39 [2020-10-28 08:49:25,946 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-28 08:49:26,344 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-28 08:49:26,803 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 08:49:27,809 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-10-28 08:49:28,248 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-28 08:49:28,630 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 08:49:29,058 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-28 08:49:29,611 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2020-10-28 08:49:29,948 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-28 08:49:30,251 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-28 08:49:30,791 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-10-28 08:49:31,128 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 08:49:31,760 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-10-28 08:49:32,067 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-28 08:49:32,668 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-28 08:49:34,123 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-10-28 08:49:34,635 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-10-28 08:49:35,320 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-28 08:49:36,023 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-10-28 08:49:36,778 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 08:49:37,120 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-28 08:49:37,485 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 08:49:37,836 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-28 08:49:38,540 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-10-28 08:49:38,919 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 08:49:39,369 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-28 08:49:39,649 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 08:49:40,198 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-28 08:49:41,066 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2020-10-28 08:49:41,510 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-28 08:49:42,133 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-28 08:49:42,592 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-28 08:49:43,265 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-28 08:49:43,834 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-28 08:49:44,441 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-28 08:49:45,041 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-10-28 08:49:45,542 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2020-10-28 08:49:46,027 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2020-10-28 08:49:46,497 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2020-10-28 08:49:47,383 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2020-10-28 08:49:47,904 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 63 [2020-10-28 08:49:48,512 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-28 08:49:49,474 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-28 08:49:51,686 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2020-10-28 08:49:52,034 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2020-10-28 08:49:52,406 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-28 08:49:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:49:53,686 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2020-10-28 08:49:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-10-28 08:49:53,688 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 81 [2020-10-28 08:49:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:49:53,690 INFO L225 Difference]: With dead ends: 188 [2020-10-28 08:49:53,690 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:49:53,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3342 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=1782, Invalid=12498, Unknown=0, NotChecked=0, Total=14280 [2020-10-28 08:49:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:49:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2020-10-28 08:49:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 08:49:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 121 transitions. [2020-10-28 08:49:53,712 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 121 transitions. Word has length 81 [2020-10-28 08:49:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:49:53,712 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 121 transitions. [2020-10-28 08:49:53,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-28 08:49:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 121 transitions. [2020-10-28 08:49:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:49:53,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:49:53,714 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:49:53,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:49:53,714 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:49:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:49:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash -44256769, now seen corresponding path program 15 times [2020-10-28 08:49:53,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:49:53,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580219854] [2020-10-28 08:49:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:49:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:53,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:53,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:53,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:58,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:49:58,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:59,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:59,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:59,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:59,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:59,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:59,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:49:59,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:59,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:59,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 08:49:59,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580219854] [2020-10-28 08:49:59,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:59,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:49:59,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014946526] [2020-10-28 08:49:59,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:49:59,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:59,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:49:59,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:49:59,272 INFO L87 Difference]: Start difference. First operand 115 states and 121 transitions. Second operand 18 states. [2020-10-28 08:50:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:00,718 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2020-10-28 08:50:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:50:00,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-28 08:50:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:00,724 INFO L225 Difference]: With dead ends: 237 [2020-10-28 08:50:00,724 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 08:50:00,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:50:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 08:50:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-10-28 08:50:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 08:50:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2020-10-28 08:50:00,743 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 83 [2020-10-28 08:50:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:00,743 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2020-10-28 08:50:00,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:50:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2020-10-28 08:50:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:50:00,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:00,744 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:00,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:50:00,745 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash -506427073, now seen corresponding path program 16 times [2020-10-28 08:50:00,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:00,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700351390] [2020-10-28 08:50:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:00,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:00,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:03,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:05,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:05,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:50:05,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:50:05,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:50:05,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:05,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:05,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:50:05,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:50:05,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 08:50:05,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:06,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:06,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:06,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:06,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 08:50:06,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700351390] [2020-10-28 08:50:06,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:06,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:50:06,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663312150] [2020-10-28 08:50:06,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:50:06,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:50:06,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:50:06,199 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand 18 states. [2020-10-28 08:50:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:50:08,072 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2020-10-28 08:50:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:50:08,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-28 08:50:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:50:08,075 INFO L225 Difference]: With dead ends: 140 [2020-10-28 08:50:08,075 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 08:50:08,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:50:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 08:50:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-28 08:50:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 08:50:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-28 08:50:08,090 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2020-10-28 08:50:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:50:08,090 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-28 08:50:08,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:50:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-28 08:50:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:50:08,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:50:08,092 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:50:08,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:50:08,092 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:50:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:50:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1171466297, now seen corresponding path program 17 times [2020-10-28 08:50:08,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:50:08,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712987381] [2020-10-28 08:50:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:50:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:08,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:09,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:12,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:13,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:13,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:50:13,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:50:13,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5462 [2020-10-28 08:50:13,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:13,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-28 08:50:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:50:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 08:50:13,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:15,465 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-28 08:50:15,726 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-28 08:50:16,293 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-28 08:50:16,539 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 08:50:16,841 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-28 08:50:17,124 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-28 08:50:17,378 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-28 08:50:17,608 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-28 08:50:17,828 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 08:50:18,095 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-28 08:50:18,323 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-28 08:50:18,548 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-28 08:50:19,246 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-28 08:50:19,749 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-28 08:50:20,040 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-28 08:50:20,314 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 08:50:20,600 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-28 08:50:20,930 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-28 08:50:21,283 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-28 08:50:22,448 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-28 08:50:22,863 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-28 08:50:23,302 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-28 08:50:28,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:50:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:50:28,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:50:28,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:50:28,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:50:28,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:50:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:50:28,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:50:28,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:50:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:50:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:50:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:50:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:50:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 6 proven. 190 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:50:28,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712987381] [2020-10-28 08:50:28,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:50:28,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-28 08:50:28,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405836324] [2020-10-28 08:50:28,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-28 08:50:28,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:50:28,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-28 08:50:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3993, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 08:50:28,305 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 65 states. [2020-10-28 08:50:29,619 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-28 08:50:30,159 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-28 08:50:33,947 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-28 08:50:35,179 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 67 [2020-10-28 08:50:35,668 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-28 08:50:38,684 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 170 DAG size of output: 138 [2020-10-28 08:50:42,483 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 156 DAG size of output: 121 [2020-10-28 08:50:43,006 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-28 08:50:44,620 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 123 [2020-10-28 08:50:45,799 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-10-28 08:50:47,079 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2020-10-28 08:50:48,332 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102