/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-fpi/condn.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:14:17,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:14:17,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:14:17,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:14:17,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:14:17,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:14:17,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:14:17,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:14:17,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:14:17,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:14:17,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:14:17,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:14:17,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:14:17,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:14:17,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:14:17,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:14:17,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:14:17,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:14:17,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:14:17,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:14:17,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:14:17,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:14:17,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:14:17,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:14:17,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:14:17,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:14:17,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:14:17,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:14:17,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:14:17,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:14:17,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:14:17,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:14:17,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:14:17,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:14:17,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:14:17,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:14:17,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:14:17,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:14:17,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:14:17,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:14:17,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:14:17,939 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 09:14:17,965 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:14:17,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:14:17,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:14:17,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:14:17,968 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:14:17,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:14:17,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:14:17,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:14:17,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:14:17,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:14:17,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:14:17,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:14:17,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:14:17,970 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:14:17,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:14:17,970 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:14:17,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:14:17,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:14:17,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:14:17,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:14:17,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:14:17,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:14:17,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:14:17,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:14:17,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:14:17,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:14:17,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:14:17,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:14:17,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:14:17,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:14:18,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:14:18,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:14:18,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:14:18,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:14:18,469 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:14:18,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condn.c [2020-10-28 09:14:18,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60c0c65a6/105755ef217f4a4d8a66b07535ee8669/FLAGf7e34d62f [2020-10-28 09:14:19,263 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:14:19,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condn.c [2020-10-28 09:14:19,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60c0c65a6/105755ef217f4a4d8a66b07535ee8669/FLAGf7e34d62f [2020-10-28 09:14:19,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60c0c65a6/105755ef217f4a4d8a66b07535ee8669 [2020-10-28 09:14:19,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:14:19,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:14:19,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:14:19,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:14:19,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:14:19,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e99a53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19, skipping insertion in model container [2020-10-28 09:14:19,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:14:19,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:14:19,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:14:19,880 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:14:19,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:14:19,920 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:14:19,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19 WrapperNode [2020-10-28 09:14:19,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:14:19,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:14:19,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:14:19,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:14:19,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (1/1) ... [2020-10-28 09:14:19,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:14:19,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:14:19,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:14:19,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:14:19,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (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 09:14:20,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:14:20,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:14:20,045 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:14:20,045 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:14:20,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:14:20,045 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:14:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:14:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:14:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:14:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:14:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:14:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:14:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:14:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:14:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:14:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:14:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:14:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:14:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:14:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:14:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:14:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:14:20,576 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:14:20,576 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:14:20,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:14:20 BoogieIcfgContainer [2020-10-28 09:14:20,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:14:20,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:14:20,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:14:20,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:14:20,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:14:19" (1/3) ... [2020-10-28 09:14:20,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6878c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:14:20, skipping insertion in model container [2020-10-28 09:14:20,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:14:19" (2/3) ... [2020-10-28 09:14:20,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6878c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:14:20, skipping insertion in model container [2020-10-28 09:14:20,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:14:20" (3/3) ... [2020-10-28 09:14:20,588 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2020-10-28 09:14:20,601 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:14:20,607 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:14:20,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:14:20,656 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:14:20,656 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:14:20,656 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:14:20,656 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:14:20,656 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:14:20,657 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:14:20,657 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:14:20,657 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:14:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-28 09:14:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:14:20,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:20,687 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] [2020-10-28 09:14:20,688 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:20,695 INFO L82 PathProgramCache]: Analyzing trace with hash -603566119, now seen corresponding path program 1 times [2020-10-28 09:14:20,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:20,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306108707] [2020-10-28 09:14:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:21,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:14:21,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:14:21,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-28 09:14:21,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:21,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:21,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:14:21,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:21,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:14:21,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:21,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:21,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:21,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:21,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:14:21,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:21,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:21,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:21,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:21,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:21,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:21,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:21,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:21,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:21,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:21,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:21,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 09:14:21,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:21,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:21,964 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 09:14:21,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306108707] [2020-10-28 09:14:21,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:14:21,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:14:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953205545] [2020-10-28 09:14:21,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:14:21,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:21,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:14:21,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:14:21,993 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-28 09:14:22,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:22,120 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-28 09:14:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:14:22,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-28 09:14:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:22,131 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:14:22,131 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:14:22,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 09:14:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:14:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 09:14:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:14:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 09:14:22,218 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-28 09:14:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:22,220 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 09:14:22,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:14:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 09:14:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:14:22,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:22,222 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] [2020-10-28 09:14:22,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:14:22,224 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:22,227 INFO L82 PathProgramCache]: Analyzing trace with hash 689239426, now seen corresponding path program 1 times [2020-10-28 09:14:22,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:22,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464695918] [2020-10-28 09:14:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:22,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:22,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:14:22,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:14:22,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-28 09:14:22,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:22,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:14:22,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:14:22,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:14:22,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:14:22,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:22,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:22,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:22,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:14:22,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:22,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:22,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:22,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:22,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:22,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:22,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:22,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:22,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:22,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:22,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:22,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:22,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:22,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:22,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:22,945 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 09:14:22,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464695918] [2020-10-28 09:14:22,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:14:22,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:14:22,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599172904] [2020-10-28 09:14:22,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:14:22,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:22,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:14:22,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:14:22,950 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-10-28 09:14:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:23,119 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-28 09:14:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:14:23,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 09:14:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:23,122 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:14:23,122 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 09:14:23,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:14:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 09:14:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-28 09:14:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 09:14:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-28 09:14:23,134 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 23 [2020-10-28 09:14:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:23,135 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-28 09:14:23,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:14:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-28 09:14:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:14:23,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:23,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:23,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:14:23,137 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:23,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:23,138 INFO L82 PathProgramCache]: Analyzing trace with hash 493588519, now seen corresponding path program 1 times [2020-10-28 09:14:23,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:23,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449990434] [2020-10-28 09:14:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:23,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:23,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:23,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:23,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:14:23,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:23,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-28 09:14:23,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:23,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:14:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:14:23,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:24,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:24,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:24,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:24,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:24,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:24,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:14:24,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:24,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:24,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:24,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:24,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:24,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:24,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:24,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:24,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:24,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:14:24,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:24,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:24,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:14:24,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449990434] [2020-10-28 09:14:24,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:24,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:14:24,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620813006] [2020-10-28 09:14:24,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:14:24,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:24,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:14:24,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:14:24,070 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 14 states. [2020-10-28 09:14:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:25,107 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-28 09:14:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:14:25,107 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-28 09:14:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:25,114 INFO L225 Difference]: With dead ends: 86 [2020-10-28 09:14:25,114 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 09:14:25,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:14:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 09:14:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2020-10-28 09:14:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 09:14:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-28 09:14:25,158 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 28 [2020-10-28 09:14:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:25,159 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-28 09:14:25,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:14:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-28 09:14:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:14:25,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:25,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:25,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:14:25,165 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash 100561509, now seen corresponding path program 1 times [2020-10-28 09:14:25,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:25,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47060306] [2020-10-28 09:14:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:25,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:25,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:25,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:25,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:14:25,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:25,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-28 09:14:25,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:25,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:25,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:14:25,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 09:14:25,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:14:25,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:25,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:25,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:25,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:25,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:25,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:14:25,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:25,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:25,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:25,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:25,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:25,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:25,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:25,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:25,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:25,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:25,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:25,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:14:25,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47060306] [2020-10-28 09:14:25,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:25,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:14:25,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985968178] [2020-10-28 09:14:25,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:14:25,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:25,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:14:25,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:14:25,802 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-10-28 09:14:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:26,292 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-28 09:14:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:14:26,294 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-28 09:14:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:26,299 INFO L225 Difference]: With dead ends: 79 [2020-10-28 09:14:26,299 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:14:26,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:14:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:14:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2020-10-28 09:14:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 09:14:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-28 09:14:26,329 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 28 [2020-10-28 09:14:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:26,329 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-28 09:14:26,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:14:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-28 09:14:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:14:26,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:26,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:26,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:14:26,333 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:26,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1667586818, now seen corresponding path program 1 times [2020-10-28 09:14:26,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:26,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141334757] [2020-10-28 09:14:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:26,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:26,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:26,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:27,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:28,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:28,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:14:28,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:14:28,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2486 [2020-10-28 09:14:28,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:28,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:14:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 09:14:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:14:28,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:29,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:29,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:29,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:29,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:29,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:29,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:14:29,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:29,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:29,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:29,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:29,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:29,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:29,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:29,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:29,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:29,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:29,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:29,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:29,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:29,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:29,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:29,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:29,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:14:29,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141334757] [2020-10-28 09:14:29,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:29,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:14:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310625953] [2020-10-28 09:14:29,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:14:29,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:29,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:14:29,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:14:29,085 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 11 states. [2020-10-28 09:14:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:29,703 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-28 09:14:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:14:29,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-28 09:14:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:29,709 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:14:29,709 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:14:29,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:14:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:14:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 50. [2020-10-28 09:14:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 09:14:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-28 09:14:29,738 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 31 [2020-10-28 09:14:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:29,739 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-28 09:14:29,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:14:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-28 09:14:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:14:29,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:29,743 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:29,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:14:29,743 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1710270799, now seen corresponding path program 1 times [2020-10-28 09:14:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:29,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152643462] [2020-10-28 09:14:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:29,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:29,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:30,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:30,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:14:30,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:30,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-28 09:14:30,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:30,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:14:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:14:30,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:30,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:30,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:30,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:30,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:30,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:30,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:14:30,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:30,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:30,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:30,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:30,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:30,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:30,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:30,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:30,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:30,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:30,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:30,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:30,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:30,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:30,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:30,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:30,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:30,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 09:14:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:30,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:30,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:30,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:30,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:30,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:14:30,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:30,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:30,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:30,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:30,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:30,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:14:30,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152643462] [2020-10-28 09:14:30,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:30,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:14:30,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278674784] [2020-10-28 09:14:30,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:14:30,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:14:30,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:14:30,700 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2020-10-28 09:14:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:31,023 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2020-10-28 09:14:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:14:31,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:14:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:31,026 INFO L225 Difference]: With dead ends: 95 [2020-10-28 09:14:31,026 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 09:14:31,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:14:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 09:14:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-28 09:14:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 09:14:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-28 09:14:31,047 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2020-10-28 09:14:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:31,047 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-28 09:14:31,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:14:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-28 09:14:31,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:14:31,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:31,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:31,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:14:31,053 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2146708784, now seen corresponding path program 1 times [2020-10-28 09:14:31,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:31,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343422622] [2020-10-28 09:14:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:31,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:32,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:32,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:14:32,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:32,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-28 09:14:32,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:32,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:14:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:14:32,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:32,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:32,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:32,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:32,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:32,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:32,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:14:32,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:32,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:32,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:32,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:32,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:32,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:32,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:32,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:32,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:32,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:32,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:32,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:32,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:32,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:32,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:14:32,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 09:14:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:32,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:32,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:32,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:32,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:32,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:14:32,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:32,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:32,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:14:32,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343422622] [2020-10-28 09:14:32,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:32,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:14:32,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331811992] [2020-10-28 09:14:32,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:14:32,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:14:32,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:14:32,592 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 16 states. [2020-10-28 09:14:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:33,981 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2020-10-28 09:14:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:14:33,981 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 09:14:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:33,983 INFO L225 Difference]: With dead ends: 120 [2020-10-28 09:14:33,985 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:14:33,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:14:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:14:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2020-10-28 09:14:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:14:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-28 09:14:34,013 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 41 [2020-10-28 09:14:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:34,013 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-28 09:14:34,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:14:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-28 09:14:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:14:34,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:34,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:34,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:14:34,017 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash 154113806, now seen corresponding path program 1 times [2020-10-28 09:14:34,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:34,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529955076] [2020-10-28 09:14:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:34,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:34,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:35,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:14:35,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:14:35,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-28 09:14:35,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:35,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:14:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:14:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:35,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:35,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:35,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:35,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:35,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:35,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:35,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:35,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:35,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:35,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:35,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:35,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:35,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:35,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:35,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:35,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:35,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:35,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:35,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:35,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:35,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:35,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:35,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 09:14:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:35,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:35,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:35,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:35,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:35,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:14:35,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:35,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:14:35,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529955076] [2020-10-28 09:14:35,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:35,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:14:35,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414425645] [2020-10-28 09:14:35,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:14:35,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:35,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:14:35,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:14:35,707 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 15 states. [2020-10-28 09:14:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:36,849 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2020-10-28 09:14:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:14:36,850 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 09:14:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:36,852 INFO L225 Difference]: With dead ends: 128 [2020-10-28 09:14:36,853 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 09:14:36,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:14:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 09:14:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 66. [2020-10-28 09:14:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:14:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-28 09:14:36,868 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 41 [2020-10-28 09:14:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:36,870 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-28 09:14:36,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:14:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-28 09:14:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:14:36,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:36,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:36,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:14:36,872 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1220327853, now seen corresponding path program 2 times [2020-10-28 09:14:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:36,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001434337] [2020-10-28 09:14:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:36,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:37,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:39,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:39,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 09:14:39,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:14:39,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2150 [2020-10-28 09:14:39,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:39,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:14:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:14:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:14:39,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:39,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:39,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:39,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:39,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:39,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:39,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:14:39,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:39,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:39,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:39,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:39,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:39,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:39,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:39,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:39,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:39,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:39,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:39,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:39,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:39,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:39,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:39,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:14:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:39,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:39,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:39,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:39,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:39,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:39,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:39,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:39,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:39,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:39,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:39,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 09:14:39,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001434337] [2020-10-28 09:14:39,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:39,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:14:39,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574071828] [2020-10-28 09:14:39,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:14:39,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:39,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:14:39,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:14:39,268 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 12 states. [2020-10-28 09:14:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:39,998 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2020-10-28 09:14:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:14:39,999 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-28 09:14:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:40,001 INFO L225 Difference]: With dead ends: 116 [2020-10-28 09:14:40,002 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 09:14:40,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:14:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 09:14:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2020-10-28 09:14:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:14:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2020-10-28 09:14:40,020 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 46 [2020-10-28 09:14:40,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:40,020 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2020-10-28 09:14:40,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:14:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2020-10-28 09:14:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:14:40,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:40,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:40,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:14:40,023 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:40,024 INFO L82 PathProgramCache]: Analyzing trace with hash -773816853, now seen corresponding path program 2 times [2020-10-28 09:14:40,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:40,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368516825] [2020-10-28 09:14:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:40,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:40,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:40,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:42,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:42,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 09:14:42,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:14:42,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2320 [2020-10-28 09:14:42,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:42,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:14:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:14:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:14:42,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:42,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:42,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:42,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:42,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:42,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:42,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:14:42,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:42,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:42,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:42,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:42,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:42,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:42,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:42,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:42,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:42,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:42,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:42,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:42,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:42,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:42,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:14:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:42,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:42,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:42,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:42,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:42,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:42,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:42,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:42,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:14:42,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368516825] [2020-10-28 09:14:42,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:42,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:14:42,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29866532] [2020-10-28 09:14:42,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:14:42,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:14:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:14:42,604 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand 13 states. [2020-10-28 09:14:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:43,525 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2020-10-28 09:14:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:14:43,525 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-28 09:14:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:43,527 INFO L225 Difference]: With dead ends: 120 [2020-10-28 09:14:43,527 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:14:43,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:14:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:14:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 52. [2020-10-28 09:14:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:14:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-28 09:14:43,540 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 46 [2020-10-28 09:14:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:43,540 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-28 09:14:43,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:14:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-28 09:14:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:14:43,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:43,542 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:43,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:14:43,542 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash 624455354, now seen corresponding path program 3 times [2020-10-28 09:14:43,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:43,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252646796] [2020-10-28 09:14:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:43,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:44,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:44,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:14:44,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:44,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-28 09:14:44,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:44,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:14:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:14:44,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:44,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:44,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:44,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:44,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:44,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:44,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:44,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:44,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:44,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:44,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:44,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:44,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:44,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:44,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:44,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:44,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:44,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:44,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:44,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:44,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:44,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:44,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:44,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 09:14:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:44,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:44,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:44,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:44,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:44,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:14:44,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:44,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:44,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:44,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 09:14:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:44,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:44,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:44,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:44,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:44,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:44,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:44,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:44,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:14:44,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252646796] [2020-10-28 09:14:44,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:44,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:14:44,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825421290] [2020-10-28 09:14:44,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:14:44,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:44,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:14:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:14:44,929 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 10 states. [2020-10-28 09:14:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:45,326 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-10-28 09:14:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:14:45,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-28 09:14:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:45,328 INFO L225 Difference]: With dead ends: 121 [2020-10-28 09:14:45,328 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 09:14:45,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:14:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 09:14:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-10-28 09:14:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:14:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-28 09:14:45,350 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 49 [2020-10-28 09:14:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:45,350 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-28 09:14:45,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:14:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-28 09:14:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:14:45,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:45,352 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:45,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:14:45,353 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:45,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1195956073, now seen corresponding path program 4 times [2020-10-28 09:14:45,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:45,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722239983] [2020-10-28 09:14:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:45,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:45,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:47,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:47,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:14:47,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:47,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2293 [2020-10-28 09:14:47,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:47,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:14:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:14:47,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:47,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:47,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:47,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:47,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:47,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:47,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:47,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:47,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:47,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:47,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:48,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:48,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:48,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:48,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:48,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:48,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:48,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:48,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:48,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:48,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:14:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:48,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:48,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:48,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:14:48,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:48,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:48,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:48,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:48,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:48,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:14:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:48,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:48,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:48,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:14:48,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:48,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:14:48,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722239983] [2020-10-28 09:14:48,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:48,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:14:48,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431440849] [2020-10-28 09:14:48,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:14:48,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:48,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:14:48,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:14:48,051 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 18 states. [2020-10-28 09:14:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:49,933 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2020-10-28 09:14:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:14:49,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-28 09:14:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:49,936 INFO L225 Difference]: With dead ends: 173 [2020-10-28 09:14:49,936 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 09:14:49,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:14:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 09:14:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2020-10-28 09:14:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:14:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-28 09:14:49,964 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 54 [2020-10-28 09:14:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:49,966 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-28 09:14:49,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:14:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-28 09:14:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:14:49,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:49,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 09:14:49,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:14:49,968 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1133916459, now seen corresponding path program 3 times [2020-10-28 09:14:49,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:49,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714923424] [2020-10-28 09:14:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:50,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:50,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:50,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:52,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:52,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:14:52,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:14:52,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2421 [2020-10-28 09:14:52,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:52,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:14:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:52,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:14:52,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:52,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:52,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:52,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:52,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:52,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:52,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:14:52,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:52,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:52,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:52,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:52,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:52,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:52,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:52,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:52,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:52,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:14:52,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:52,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:52,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:52,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:52,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:52,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:52,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:14:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:52,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:52,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:52,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:52,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:52,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:14:52,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:52,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:52,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:52,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:14:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:52,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:52,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:52,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:52,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:52,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:14:52,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:52,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:52,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:52,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:52,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:52,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:14:52,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714923424] [2020-10-28 09:14:52,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:52,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:14:52,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158829478] [2020-10-28 09:14:52,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:14:52,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:52,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:14:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:14:52,755 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 17 states. [2020-10-28 09:14:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:54,201 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2020-10-28 09:14:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:14:54,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-28 09:14:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:54,204 INFO L225 Difference]: With dead ends: 121 [2020-10-28 09:14:54,204 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 09:14:54,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:14:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 09:14:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-10-28 09:14:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 09:14:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-28 09:14:54,216 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 54 [2020-10-28 09:14:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:54,217 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-28 09:14:54,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:14:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-28 09:14:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:14:54,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:54,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:54,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:14:54,218 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:54,219 INFO L82 PathProgramCache]: Analyzing trace with hash 492871198, now seen corresponding path program 5 times [2020-10-28 09:14:54,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:54,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398869803] [2020-10-28 09:14:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:54,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:54,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:54,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:58,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:58,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:14:58,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:14:58,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4285 [2020-10-28 09:14:58,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:58,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:58,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:14:58,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:14:58,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:14:58,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:59,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:59,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:59,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:59,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:59,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:14:59,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:59,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:59,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:59,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:59,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:59,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:59,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:14:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:59,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:59,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:59,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:59,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:59,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:59,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:59,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:59,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:59,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:59,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:59,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:59,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:14:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:59,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:59,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:59,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:59,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:14:59,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:59,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:59,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:59,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:14:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:59,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:59,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:59,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:59,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:59,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:14:59,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:59,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:14:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:14:59,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:14:59,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398869803] [2020-10-28 09:14:59,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:59,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:14:59,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072234202] [2020-10-28 09:14:59,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:14:59,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:14:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:14:59,371 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 22 states. [2020-10-28 09:15:01,192 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-28 09:15:01,987 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-28 09:15:02,701 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-28 09:15:02,903 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-28 09:15:03,151 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-28 09:15:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:03,192 INFO L93 Difference]: Finished difference Result 141 states and 165 transitions. [2020-10-28 09:15:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 09:15:03,193 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-28 09:15:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:03,195 INFO L225 Difference]: With dead ends: 141 [2020-10-28 09:15:03,195 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:15:03,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=612, Invalid=2928, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:15:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:15:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 83. [2020-10-28 09:15:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:15:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-28 09:15:03,220 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 59 [2020-10-28 09:15:03,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:03,220 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-28 09:15:03,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:15:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-28 09:15:03,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:15:03,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:03,221 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:03,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:15:03,222 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:03,222 INFO L82 PathProgramCache]: Analyzing trace with hash 554910812, now seen corresponding path program 4 times [2020-10-28 09:15:03,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:03,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813393696] [2020-10-28 09:15:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:03,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:03,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:03,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:07,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:07,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:15:07,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:15:07,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4527 [2020-10-28 09:15:07,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:07,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:07,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:15:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:15:07,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:08,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:08,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:08,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:08,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:08,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 09:15:08,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:08,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:08,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:08,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:08,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:08,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:08,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:08,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:08,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:08,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:08,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:08,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:08,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:08,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:15:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:08,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:08,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:08,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:08,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:15:08,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:08,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:08,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:08,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:15:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:08,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:08,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:08,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:08,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:08,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:15:08,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:08,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:08,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:08,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:15:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813393696] [2020-10-28 09:15:08,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:08,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:15:08,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099059600] [2020-10-28 09:15:08,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:15:08,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:08,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:15:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:15:08,764 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 22 states. [2020-10-28 09:15:11,273 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-28 09:15:12,570 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 09:15:12,806 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 09:15:13,510 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-28 09:15:13,833 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 09:15:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:14,059 INFO L93 Difference]: Finished difference Result 189 states and 218 transitions. [2020-10-28 09:15:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-28 09:15:14,061 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-28 09:15:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:14,063 INFO L225 Difference]: With dead ends: 189 [2020-10-28 09:15:14,063 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 09:15:14,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1073, Invalid=5569, Unknown=0, NotChecked=0, Total=6642 [2020-10-28 09:15:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 09:15:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2020-10-28 09:15:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:15:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2020-10-28 09:15:14,082 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 59 [2020-10-28 09:15:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:14,082 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2020-10-28 09:15:14,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:15:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2020-10-28 09:15:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:15:14,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:14,083 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:14,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:15:14,084 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1879074592, now seen corresponding path program 5 times [2020-10-28 09:15:14,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:14,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651775434] [2020-10-28 09:15:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:14,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:14,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:14,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:15,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:18,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:18,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:15:18,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:15:18,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4674 [2020-10-28 09:15:18,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:18,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:15:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:15:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:19,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:19,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:19,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:19,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:19,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:19,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:19,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:19,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:19,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:19,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:19,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:19,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:19,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:19,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:19,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:19,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:19,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:19,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:19,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:19,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:19,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:19,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:15:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:19,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:19,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:19,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:19,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:19,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:15:19,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:19,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:19,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:19,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:19,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:19,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:19,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:15:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:19,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:19,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:19,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:19,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:19,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:15:19,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:19,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:19,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:19,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:19,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 09:15:19,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651775434] [2020-10-28 09:15:19,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:19,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:15:19,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085044581] [2020-10-28 09:15:19,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:15:19,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:19,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:15:19,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:15:19,418 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 21 states. [2020-10-28 09:15:22,316 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-28 09:15:23,564 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-28 09:15:23,758 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-28 09:15:24,467 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 09:15:24,828 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-28 09:15:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:25,025 INFO L93 Difference]: Finished difference Result 189 states and 217 transitions. [2020-10-28 09:15:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-28 09:15:25,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-28 09:15:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:25,029 INFO L225 Difference]: With dead ends: 189 [2020-10-28 09:15:25,029 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 09:15:25,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1042, Invalid=5764, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 09:15:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 09:15:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 78. [2020-10-28 09:15:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:15:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-28 09:15:25,047 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 59 [2020-10-28 09:15:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:25,048 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-28 09:15:25,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:15:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-28 09:15:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:15:25,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:25,051 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:25,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:15:25,051 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1941114206, now seen corresponding path program 6 times [2020-10-28 09:15:25,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:25,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782548292] [2020-10-28 09:15:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:25,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:25,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:25,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:25,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:27,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2755 [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:15:27,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:28,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:28,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:28,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:28,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:28,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:15:28,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:28,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:28,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:28,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:28,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:28,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:28,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:28,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:28,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:28,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:28,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:28,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:28,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:15:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:28,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:28,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:28,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:28,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:15:28,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:28,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:28,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:28,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:28,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:28,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:28,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:15:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:28,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:28,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:28,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:28,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:28,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:28,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:28,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:28,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:28,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:28,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:28,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 09:15:28,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782548292] [2020-10-28 09:15:28,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:28,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:15:28,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613435716] [2020-10-28 09:15:28,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:15:28,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:28,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:15:28,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:15:28,565 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 21 states. [2020-10-28 09:15:29,996 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-28 09:15:30,750 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-28 09:15:31,325 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 09:15:31,472 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-28 09:15:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:31,948 INFO L93 Difference]: Finished difference Result 188 states and 216 transitions. [2020-10-28 09:15:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 09:15:31,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-28 09:15:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:31,951 INFO L225 Difference]: With dead ends: 188 [2020-10-28 09:15:31,951 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 09:15:31,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=653, Invalid=3007, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 09:15:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 09:15:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 67. [2020-10-28 09:15:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:15:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-28 09:15:31,964 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 59 [2020-10-28 09:15:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:31,964 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-28 09:15:31,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:15:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-28 09:15:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:15:31,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:31,965 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:31,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:15:31,966 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 294398784, now seen corresponding path program 6 times [2020-10-28 09:15:31,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:31,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682432859] [2020-10-28 09:15:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:31,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:32,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:33,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:33,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:35,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:15:35,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:15:35,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3702 [2020-10-28 09:15:35,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:35,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:35,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:15:35,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:15:35,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:15:35,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:35,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:35,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:35,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:35,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:35,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:35,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:35,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:35,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:35,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:35,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:35,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:35,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:35,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:35,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:35,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:35,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:35,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:35,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:35,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:35,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:15:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:35,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:35,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:35,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:35,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:35,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:35,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:35,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:35,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:35,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:15:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:35,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:35,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:35,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:35,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:35,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:35,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:35,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:35,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:35,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:35,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:35,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 09:15:36,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682432859] [2020-10-28 09:15:36,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:36,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:15:36,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572947994] [2020-10-28 09:15:36,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:15:36,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:36,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:15:36,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:15:36,006 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 14 states. [2020-10-28 09:15:37,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:37,038 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-10-28 09:15:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:15:37,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-28 09:15:37,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:37,040 INFO L225 Difference]: With dead ends: 102 [2020-10-28 09:15:37,040 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:15:37,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:15:37,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:15:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-28 09:15:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:15:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-28 09:15:37,061 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 61 [2020-10-28 09:15:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:37,061 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-28 09:15:37,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:15:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-28 09:15:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:15:37,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:37,062 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:37,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:15:37,063 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:37,063 INFO L82 PathProgramCache]: Analyzing trace with hash 356438398, now seen corresponding path program 7 times [2020-10-28 09:15:37,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:37,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911202538] [2020-10-28 09:15:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:37,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:37,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:39,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:39,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:39,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:15:39,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:15:39,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2648 [2020-10-28 09:15:39,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:39,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:39,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:15:39,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:15:39,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:15:39,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:40,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:40,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:40,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:40,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:40,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:40,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:40,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:40,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:40,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:40,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:40,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:40,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:40,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:40,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:40,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:40,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:40,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:15:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:40,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:40,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:40,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:40,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:40,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:40,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:40,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:40,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:15:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:40,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:40,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:40,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:40,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:40,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:40,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:40,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-28 09:15:40,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911202538] [2020-10-28 09:15:40,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:40,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:15:40,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059165097] [2020-10-28 09:15:40,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:15:40,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:40,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:15:40,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:15:40,068 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 15 states. [2020-10-28 09:15:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:41,346 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2020-10-28 09:15:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:15:41,346 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-28 09:15:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:41,348 INFO L225 Difference]: With dead ends: 109 [2020-10-28 09:15:41,348 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 09:15:41,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:15:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 09:15:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2020-10-28 09:15:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:15:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-10-28 09:15:41,360 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 61 [2020-10-28 09:15:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:41,361 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-10-28 09:15:41,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:15:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-10-28 09:15:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:15:41,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:41,362 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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] [2020-10-28 09:15:41,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:15:41,362 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1697556694, now seen corresponding path program 7 times [2020-10-28 09:15:41,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:41,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425638324] [2020-10-28 09:15:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:41,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:41,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:44,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:44,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:15:44,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:15:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3387 [2020-10-28 09:15:44,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:44,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:44,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:15:44,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:15:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:15:44,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:45,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:45,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:45,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:45,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:45,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:45,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:45,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:45,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:45,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:45,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:45,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:45,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:45,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:45,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:45,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:45,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:45,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:45,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:45,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:45,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:45,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:45,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:15:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:45,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:45,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:45,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:45,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:45,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:45,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:45,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:45,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:45,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:15:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:45,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:45,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:45,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:45,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:45,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:45,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:45,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:45,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:45,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:45,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:45,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:45,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:15:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:45,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:45,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:45,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:45,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:45,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:45,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:45,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:45,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-28 09:15:45,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425638324] [2020-10-28 09:15:45,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:45,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:15:45,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740088006] [2020-10-28 09:15:45,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:15:45,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:15:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:15:45,145 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 16 states. [2020-10-28 09:15:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:46,391 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2020-10-28 09:15:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:15:46,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-28 09:15:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:46,397 INFO L225 Difference]: With dead ends: 117 [2020-10-28 09:15:46,397 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 09:15:46,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:15:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 09:15:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-10-28 09:15:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 09:15:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-10-28 09:15:46,419 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 69 [2020-10-28 09:15:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:46,419 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-10-28 09:15:46,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:15:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-10-28 09:15:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:15:46,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:46,420 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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 09:15:46,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:15:46,420 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:46,421 INFO L82 PathProgramCache]: Analyzing trace with hash 353427304, now seen corresponding path program 8 times [2020-10-28 09:15:46,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:46,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42664438] [2020-10-28 09:15:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3054 [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:49,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:49,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:49,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:49,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:49,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:49,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:49,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:49,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:49,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:49,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:49,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:49,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:49,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:49,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:49,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:49,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:49,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:49,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:15:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:49,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:49,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:49,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:49,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:15:49,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:49,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:49,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:49,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:15:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:49,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:49,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:49,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:15:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:49,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:49,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:49,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-28 09:15:49,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42664438] [2020-10-28 09:15:49,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:49,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:15:49,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820619347] [2020-10-28 09:15:49,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:15:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:15:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:15:49,778 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 15 states. [2020-10-28 09:15:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:51,173 INFO L93 Difference]: Finished difference Result 143 states and 163 transitions. [2020-10-28 09:15:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:15:51,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-28 09:15:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:51,175 INFO L225 Difference]: With dead ends: 143 [2020-10-28 09:15:51,176 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 09:15:51,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:15:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 09:15:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2020-10-28 09:15:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 09:15:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-10-28 09:15:51,196 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2020-10-28 09:15:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:51,197 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-10-28 09:15:51,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:15:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-10-28 09:15:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:15:51,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:51,198 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 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 09:15:51,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:15:51,201 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:51,202 INFO L82 PathProgramCache]: Analyzing trace with hash 338023003, now seen corresponding path program 9 times [2020-10-28 09:15:51,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:51,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942033728] [2020-10-28 09:15:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:51,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:55,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4106 [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:15:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:56,187 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-28 09:15:56,361 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-28 09:15:56,541 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-28 09:15:56,716 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-28 09:15:56,911 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-28 09:15:57,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:57,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:57,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:57,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:57,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:57,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:57,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:57,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:57,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:57,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:57,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:57,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:57,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:57,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:57,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:57,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:57,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:57,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:57,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:57,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:57,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:15:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:57,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:57,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:57,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:57,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:57,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:15:57,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:57,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:57,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:57,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:15:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:57,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:57,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:57,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:57,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:15:57,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:57,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:57,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:15:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:57,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:57,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:57,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:57,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:57,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:15:57,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:57,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:57,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 09:15:57,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942033728] [2020-10-28 09:15:57,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:57,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:15:57,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008145735] [2020-10-28 09:15:57,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:15:57,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:15:57,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:15:57,241 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 26 states. [2020-10-28 09:15:59,973 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-28 09:16:00,369 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-28 09:16:00,693 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-28 09:16:01,562 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-28 09:16:01,949 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-28 09:16:02,287 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-28 09:16:02,676 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-10-28 09:16:03,471 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-28 09:16:03,752 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-28 09:16:04,070 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-28 09:16:04,342 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-28 09:16:04,872 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-28 09:16:05,190 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-28 09:16:05,545 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-28 09:16:05,904 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-28 09:16:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:06,230 INFO L93 Difference]: Finished difference Result 262 states and 321 transitions. [2020-10-28 09:16:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-28 09:16:06,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-10-28 09:16:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:06,237 INFO L225 Difference]: With dead ends: 262 [2020-10-28 09:16:06,237 INFO L226 Difference]: Without dead ends: 208 [2020-10-28 09:16:06,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2519 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1293, Invalid=6717, Unknown=0, NotChecked=0, Total=8010 [2020-10-28 09:16:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-28 09:16:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 139. [2020-10-28 09:16:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 09:16:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2020-10-28 09:16:06,264 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 72 [2020-10-28 09:16:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:06,264 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2020-10-28 09:16:06,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:16:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2020-10-28 09:16:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:16:06,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:06,266 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 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 09:16:06,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:16:06,266 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:06,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1520685959, now seen corresponding path program 10 times [2020-10-28 09:16:06,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:06,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104534957] [2020-10-28 09:16:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:06,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:06,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:08,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:11,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:11,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:16:11,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:16:11,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:16:11,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:11,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:11,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:16:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:16:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:16:11,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:11,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:11,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:11,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:11,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:11,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:11,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:11,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:11,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:11,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:11,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:11,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:11,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:11,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:11,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:11,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:11,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:11,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:11,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:16:11,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:11,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:11,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:11,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:11,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:11,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:11,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:16:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:11,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:11,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:11,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:16:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:11,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:11,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:11,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:11,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:11,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:11,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:11,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:11,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:16:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:11,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:11,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:11,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:11,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:11,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:11,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:11,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:11,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 09:16:11,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104534957] [2020-10-28 09:16:11,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:11,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:16:11,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934192113] [2020-10-28 09:16:11,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:16:11,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:11,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:16:11,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:16:11,723 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand 17 states. [2020-10-28 09:16:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:13,691 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2020-10-28 09:16:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:16:13,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-10-28 09:16:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:13,693 INFO L225 Difference]: With dead ends: 187 [2020-10-28 09:16:13,693 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 09:16:13,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:16:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 09:16:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 105. [2020-10-28 09:16:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 09:16:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2020-10-28 09:16:13,714 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 74 [2020-10-28 09:16:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:13,715 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2020-10-28 09:16:13,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:16:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2020-10-28 09:16:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:16:13,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:13,716 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 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] [2020-10-28 09:16:13,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:16:13,716 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1674821194, now seen corresponding path program 8 times [2020-10-28 09:16:13,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:13,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391515367] [2020-10-28 09:16:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:13,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:16,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:17,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:16:18,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:18,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:18,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:18,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:18,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:18,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:18,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:18,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:18,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:18,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 09:16:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:18,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:18,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 09:16:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:18,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:18,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:18,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:16:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:18,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:18,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:18,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 09:16:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:18,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:18,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:18,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 09:16:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391515367] [2020-10-28 09:16:18,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:18,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:16:18,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998396445] [2020-10-28 09:16:18,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:16:18,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:16:18,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:16:18,982 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 14 states. [2020-10-28 09:16:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:19,641 INFO L93 Difference]: Finished difference Result 175 states and 198 transitions. [2020-10-28 09:16:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:16:19,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-28 09:16:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:19,645 INFO L225 Difference]: With dead ends: 175 [2020-10-28 09:16:19,645 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 09:16:19,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 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 09:16:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 09:16:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2020-10-28 09:16:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 09:16:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2020-10-28 09:16:19,662 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 79 [2020-10-28 09:16:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:19,662 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2020-10-28 09:16:19,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:16:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2020-10-28 09:16:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:16:19,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:19,663 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:19,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:16:19,664 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:19,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1900886087, now seen corresponding path program 11 times [2020-10-28 09:16:19,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:19,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263016388] [2020-10-28 09:16:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:19,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:19,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:19,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:24,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:24,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:16:24,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:16:24,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:16:24,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:24,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:24,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:16:24,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:24,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 09:16:24,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:25,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:25,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:25,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:25,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:25,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:25,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:25,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:25,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:25,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:25,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:25,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:25,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:25,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:25,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:25,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:25,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:25,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:16:25,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:25,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:25,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:25,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:25,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:25,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:16:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:25,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:25,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:25,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:25,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:25,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:25,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:25,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:25,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:25,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:16:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:25,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:25,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:25,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:25,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:25,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:25,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:25,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:25,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:25,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:25,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:25,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:25,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:16:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:25,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:25,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:25,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:25,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:25,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:25,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:25,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:25,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:25,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:25,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:25,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:25,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:16:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:25,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:25,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:25,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:25,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:25,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:25,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:25,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:25,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 36 proven. 52 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:16:25,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263016388] [2020-10-28 09:16:25,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:25,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:16:25,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483865483] [2020-10-28 09:16:25,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:16:25,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:25,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:16:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:16:25,769 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 24 states. [2020-10-28 09:16:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:28,239 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2020-10-28 09:16:28,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 09:16:28,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 80 [2020-10-28 09:16:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:28,242 INFO L225 Difference]: With dead ends: 167 [2020-10-28 09:16:28,242 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:16:28,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=550, Invalid=2206, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:16:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:16:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-28 09:16:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 09:16:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2020-10-28 09:16:28,261 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 80 [2020-10-28 09:16:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:28,262 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2020-10-28 09:16:28,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:16:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2020-10-28 09:16:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:16:28,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:28,263 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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] [2020-10-28 09:16:28,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:16:28,264 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:28,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1753045723, now seen corresponding path program 9 times [2020-10-28 09:16:28,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:28,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124194096] [2020-10-28 09:16:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:28,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:28,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:30,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:33,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:33,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 09:16:33,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:16:33,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:16:33,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:33,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:16:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:16:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:16:33,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:33,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:33,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:33,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:33,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:33,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:33,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:33,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:33,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:33,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:33,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:33,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:33,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:33,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:33,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:33,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:33,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:33,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:33,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:16:33,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:33,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:33,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:33,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:33,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:33,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:33,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:16:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:33,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:33,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:33,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:33,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:33,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:33,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:33,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:33,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:33,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:16:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:33,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:33,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:33,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:33,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:33,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:33,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:33,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:33,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:33,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:33,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:33,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:16:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:33,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:33,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:33,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:33,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:33,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:33,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:33,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:33,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:33,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:16:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:33,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:33,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:33,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:33,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:33,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:33,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:33,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:33,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 09:16:33,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124194096] [2020-10-28 09:16:33,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:33,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:16:33,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935224003] [2020-10-28 09:16:33,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:16:33,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:33,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:16:33,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:16:33,720 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 18 states. [2020-10-28 09:16:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:35,436 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2020-10-28 09:16:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:16:35,437 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-28 09:16:35,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:35,439 INFO L225 Difference]: With dead ends: 164 [2020-10-28 09:16:35,439 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 09:16:35,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:16:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 09:16:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2020-10-28 09:16:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 09:16:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2020-10-28 09:16:35,461 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 82 [2020-10-28 09:16:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:35,461 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2020-10-28 09:16:35,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:16:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2020-10-28 09:16:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:16:35,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:35,463 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 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 09:16:35,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:16:35,463 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1504899229, now seen corresponding path program 12 times [2020-10-28 09:16:35,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:35,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087078397] [2020-10-28 09:16:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:35,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:36,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 09:16:40,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:16:40,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:16:40,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:16:40,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:16:40,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:16:40,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:40,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:40,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:40,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:40,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:40,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:40,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:40,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:40,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:40,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:40,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:40,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:40,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:40,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:40,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:40,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:16:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:40,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:40,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:40,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:40,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:40,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:40,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:40,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:40,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:16:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:40,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:40,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:40,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:40,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:40,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:40,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:16:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:40,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:40,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:40,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:40,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:40,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:40,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:40,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:40,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:16:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:40,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:40,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:40,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:40,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:40,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 09:16:40,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087078397] [2020-10-28 09:16:40,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:40,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:16:40,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877509477] [2020-10-28 09:16:40,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:16:40,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:16:40,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:16:40,860 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand 17 states. [2020-10-28 09:16:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:42,765 INFO L93 Difference]: Finished difference Result 207 states and 244 transitions. [2020-10-28 09:16:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:16:42,766 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-28 09:16:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:42,768 INFO L225 Difference]: With dead ends: 207 [2020-10-28 09:16:42,768 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 09:16:42,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:16:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 09:16:42,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 155. [2020-10-28 09:16:42,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 09:16:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 186 transitions. [2020-10-28 09:16:42,812 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 186 transitions. Word has length 82 [2020-10-28 09:16:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:42,812 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 186 transitions. [2020-10-28 09:16:42,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:16:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 186 transitions. [2020-10-28 09:16:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:16:42,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:42,814 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 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 09:16:42,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:16:42,814 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:42,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:42,814 INFO L82 PathProgramCache]: Analyzing trace with hash 275399060, now seen corresponding path program 13 times [2020-10-28 09:16:42,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:42,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118485236] [2020-10-28 09:16:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:42,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:43,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:47,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:47,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 09:16:47,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:16:47,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:16:47,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:47,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:47,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:16:47,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:47,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 09:16:47,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:48,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:48,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:16:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:48,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:16:48,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:48,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:48,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:16:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:48,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:48,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:48,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:48,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:16:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:48,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:48,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 09:16:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-28 09:16:48,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118485236] [2020-10-28 09:16:48,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:48,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:16:48,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043243987] [2020-10-28 09:16:48,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:16:48,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:48,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:16:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:16:48,683 INFO L87 Difference]: Start difference. First operand 155 states and 186 transitions. Second operand 26 states. [2020-10-28 09:16:52,185 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-28 09:16:52,470 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-28 09:16:53,344 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-28 09:16:54,569 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 09:16:54,767 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-28 09:16:55,417 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-28 09:16:55,759 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 09:16:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:55,985 INFO L93 Difference]: Finished difference Result 426 states and 514 transitions. [2020-10-28 09:16:55,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-28 09:16:55,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2020-10-28 09:16:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:55,990 INFO L225 Difference]: With dead ends: 426 [2020-10-28 09:16:55,990 INFO L226 Difference]: Without dead ends: 368 [2020-10-28 09:16:55,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3989 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1812, Invalid=9530, Unknown=0, NotChecked=0, Total=11342 [2020-10-28 09:16:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-28 09:16:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 195. [2020-10-28 09:16:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-28 09:16:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 242 transitions. [2020-10-28 09:16:56,032 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 242 transitions. Word has length 85 [2020-10-28 09:16:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:56,033 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 242 transitions. [2020-10-28 09:16:56,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:16:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 242 transitions. [2020-10-28 09:16:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 09:16:56,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:56,034 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 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 09:16:56,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:16:56,035 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash 399755318, now seen corresponding path program 14 times [2020-10-28 09:16:56,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:56,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047738937] [2020-10-28 09:16:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:56,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:58,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:17:01,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:17:01,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:17:01,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:17:01,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 09:17:01,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 09:17:01,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:01,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:01,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:01,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:01,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:01,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:01,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:01,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:01,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:01,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:17:01,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:01,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:01,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:01,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:01,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 09:17:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:01,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:01,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:01,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:17:01,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:17:01,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:01,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:17:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:01,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:01,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:01,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:17:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:17:01,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:01,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 09:17:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:01,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:01,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:01,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:17:01,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:01,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:17:01,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:01,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-28 09:17:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:01,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:01,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:01,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:17:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:17:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-28 09:17:01,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047738937] [2020-10-28 09:17:01,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:01,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:17:01,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208651050] [2020-10-28 09:17:01,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:17:01,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:17:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:17:01,561 INFO L87 Difference]: Start difference. First operand 195 states and 242 transitions. Second operand 19 states. [2020-10-28 09:17:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:04,258 INFO L93 Difference]: Finished difference Result 254 states and 308 transitions. [2020-10-28 09:17:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:17:04,259 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-10-28 09:17:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:04,262 INFO L225 Difference]: With dead ends: 254 [2020-10-28 09:17:04,262 INFO L226 Difference]: Without dead ends: 251 [2020-10-28 09:17:04,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:17:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-28 09:17:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 143. [2020-10-28 09:17:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 09:17:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 169 transitions. [2020-10-28 09:17:04,288 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 169 transitions. Word has length 87 [2020-10-28 09:17:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:04,289 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 169 transitions. [2020-10-28 09:17:04,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:17:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 169 transitions. [2020-10-28 09:17:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 09:17:04,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:04,290 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:04,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:17:04,290 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1948380962, now seen corresponding path program 15 times [2020-10-28 09:17:04,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:04,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588543492] [2020-10-28 09:17:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:04,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:05,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:05,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:06,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:06,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:06,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:06,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:06,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:07,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:09,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:17:09,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:17:09,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:17:09,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:09,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:09,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:17:09,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:09,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:17:09,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:09,331 ERROR L253 erpolLogProxyWrapper]: Interpolant 31 not inductive [2020-10-28 09:17:09,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:17:09,335 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-28 09:17:09,351 INFO L168 Benchmark]: Toolchain (without parser) took 169718.51 ms. Allocated memory was 151.0 MB in the beginning and 706.7 MB in the end (delta: 555.7 MB). Free memory was 125.9 MB in the beginning and 459.1 MB in the end (delta: -333.2 MB). Peak memory consumption was 430.7 MB. Max. memory is 8.0 GB. [2020-10-28 09:17:09,351 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 09:17:09,352 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 09:17:09,352 INFO L168 Benchmark]: Boogie Preprocessor took 40.07 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 114.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 09:17:09,353 INFO L168 Benchmark]: RCFGBuilder took 614.92 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 131.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. [2020-10-28 09:17:09,353 INFO L168 Benchmark]: TraceAbstraction took 168769.96 ms. Allocated memory was 151.0 MB in the beginning and 706.7 MB in the end (delta: 555.7 MB). Free memory was 131.2 MB in the beginning and 459.1 MB in the end (delta: -327.9 MB). Peak memory consumption was 435.0 MB. Max. memory is 8.0 GB. [2020-10-28 09:17:09,357 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 282.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.07 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 114.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 614.92 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 131.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 168769.96 ms. Allocated memory was 151.0 MB in the beginning and 706.7 MB in the end (delta: 555.7 MB). Free memory was 131.2 MB in the beginning and 459.1 MB in the end (delta: -327.9 MB). Peak memory consumption was 435.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...